{"title":"Microwave Acid Digestion\/Acc.","description":"\u003cp\u003eMicrowave Acid Digestion\/Accessories\u003c\/p\u003e","products":[{"product_id":"screw-cap-for-parr-4781-4782-acid-digestion-vessels-parr-322ac","title":"Screw Cap for PARR 4781\/4782 Acid Digestion Vessels, PARR 322AC","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111601897787,"sku":"PAR-322AC-EA","price":305.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-322AC.png?v=1784720171"},{"product_id":"body-parr-microwave-digestion-vessel-45-ml-4782-parr-323ac2","title":"Body, PARR Microwave Digestion Vessel, 45 mL [4782], PARR 323AC2","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111601930555,"sku":"PAR-323AC2-EA","price":205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-323AC2.png?v=1784720172"},{"product_id":"plate-bottom-parr-microwave-digestion-vessel-parr-324ac2","title":"Plate, Bottom, PARR Microwave Digestion Vessel, PARR 324AC2","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111601963323,"sku":"PAR-324AC2-EA","price":42.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-324AC2.png?v=1784720174"},{"product_id":"relief-disc-microwave-digestion-vessel-parr-330ac","title":"Relief Disc, Microwave Digestion Vessel, PARR 330AC","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111601996091,"sku":"PAR-330AC-EA","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-330AC.png?v=1784720175"},{"product_id":"pressure-plate-top-for-parr-microvave-digestion-vessel-parr-331ac","title":"Pressure Plate, Top, for PARR Microvave Digestion Vessel PARR 331AC","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111602061627,"sku":"PAR-331AC-EA","price":54.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-331AC.png?v=1784720176"},{"product_id":"teflon-screw-for-parr-acid-digestion-vessel-parr-331acfhuc","title":"Teflon Screw, for PARR Acid Digestion Vessel, PARR 331ACFHUC","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111602127163,"sku":"PAR-331ACFHUC-EA","price":28.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-331ACFHUC_4a11d035-a063-4bb9-8169-2ebff1205dab.png?v=1784720178"},{"product_id":"general-purpose-acid-digestion-vessel-45-ml-250-degrees-c-1800-psig-parr-instruments-4744","title":"General Purpose Acid Digestion Vessel, 45 mL, 250 degrees C, 1800 psig, Parr Instruments 4744","description":"\u003cp\u003e\u003cstrong\u003eParr Instruments® General Purpose Acid Digestion Vessel, 45 mL, 250 degrees C, 1800 psig, 4744\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures: \u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e4744 is 45 mL modification of 23 mL, 4749 PTFE lined vessel designed for users who want additional capacity in this popular model\u003c\/li\u003e \u003cli\u003eMade with same closure as the 23 mL vessel, using similar thick-walled PTFE cup, 3-3\/4 inches deep inside, with broad flanged seal\u003c\/li\u003e \u003cli\u003eSafety blow out protection is provided with blow-off disc that will release pressure through an opening in cover\u003c\/li\u003e \u003cli\u003eVessel is sealed by turning screw cap down until it is hand tight, then tightening the cap not more than one-eighth turn with hook spanner\u003c\/li\u003e \u003cli\u003eSpanner and holding fixture required for this operation are same as used with the 4749 Vessel—these accessories must be purchased separately\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e \u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111602979131,"sku":"PAR-4744-EA","price":850.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-4744.png?v=1784720207"},{"product_id":"microwave-acid-digestion-vessel-23-ml-parr-instruments-4781","title":"Microwave Acid Digestion Vessel, 23 mL, Parr Instruments, 4781","description":"\u003cp\u003e\u003cstrong\u003eParr Instruments® Microwave Acid Digestion Vessel, 23 mL, 4781\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:  \u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eFast digestion times — many materials requiring exposures of less than one minute to obtain complete dissolution\u003c\/li\u003e \u003cli\u003eRapid cycle time allows for step digestions either by addition of acid in several steps or using different acids in steps to dissolve inorganics once organic matrix is destroyed\u003c\/li\u003e \u003cli\u003eTemperatures to 250 °C\u003c\/li\u003e \u003cli\u003ePressures to 1200 psi\u003c\/li\u003e \u003cli\u003eComplete containment of volatiles\u003c\/li\u003e \u003cli\u003eFreedom from metal contamination with high strength polymer vessels\u003c\/li\u003e \u003cli\u003eChemically-inert vessels in which microwave heating can be used for rapid sample dissolution in sealed vessel\u003c\/li\u003e \u003cli\u003eCan be placed directly in microwave oven for specific, high speed heating to drastically reduce time required to dissolve or digest analytical sample\u003c\/li\u003e \u003cli\u003eMade in two sizes that can be heated in any of commercial microwave ovens regularly offered for household use — no specially constructed and\/or vented ovens required\u003c\/li\u003e \u003cli\u003eHigh strength design provides much more vigorous action than can be obtained with open-cup microwave digestion systems which are restricted to lower temperatures and pressures\u003c\/li\u003e \u003cli\u003eNo loss of volatile matter from these sealed vessels and microwave oven is not exposed to corrosive acid fumes\u003c\/li\u003e \u003cli\u003eSeveral safety features built into vessel construction \u003cul\u003e \u003cli\u003eSelf-sealed with PTFE O-ring\u003c\/li\u003e \u003cli\u003eOver-pressure prevented by compressible relief disc that operates in conjunction with O-ring cup seal — disc releases support to O-ring at approximately 1500 psi allowing O-ring to blow out\u003c\/li\u003e \u003cli\u003ePressure indicator is by retaining screw, which is normally flush with top of vessel cap, will protrude above top surface as pressure increases at approximate rate of 1\/32 inch for each 500 psi\u003c\/li\u003e \u003cli\u003eOuter body and screw cap made of microwave-transparent polymer maintains good strength up to about 150 °C — outside body seldom reaches above 50 °C thanks to its insulating power which keeps heat inside vessel\u003c\/li\u003e \u003c\/ul\u003e \u003c\/li\u003e \u003c\/ul\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111603110203,"sku":"PAR-4781-EA","price":805.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-4781.png?v=1784720212"},{"product_id":"microwave-acid-digestion-vessel-45-ml-parr-4782","title":"Microwave Acid Digestion Vessel, 45 mL, PARR 4782","description":"\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eParr Microwave Acid Digestion Vessels provide:\u003c\/h3\u003e\n\u003cul style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; list-style-image: none; list-style-position: outside; list-style-type: disc; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px; margin: 0px 0px 1.5em 3em;\"\u003e\n\u003cli style=\"box-sizing: inherit;\"\u003eFast digestion times.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit;\"\u003eTemperatures to 250 °C.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit;\"\u003ePressures to 1200 psi.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit;\"\u003eComplete containment of volatiles.\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit;\"\u003eFreedom from metal contamination.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eMicrowave Digestion Vessels\u003c\/h3\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eIn addition to unique acid digestion vessels, Parr offers a line of chemically-inert vessels in which microwave heating can be used for rapid sample dissolution in a sealed vessel. These vessels can be placed directly in a microwave oven for specific, high speed heating to drastically reduce the time required to dissolve or digest an analytical sample. They are made in two sizes that can be heated in any of the commercial microwave ovens regularly offered for household use. Specially constructed and\/or vented ovens are not required.\u003c\/p\u003e\n\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eSpeed Analytical Procedures\u003c\/h3\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eThe aggressive digestion action produced at the higher temperatures and pressures generated in these vessels result in remarkably short digestion times, with many materials requiring exposures of less than one minute to obtain complete dissolution. Their unique, high strength design provides a much more vigorous action than can be obtained with open-cup microwave digestion systems which are restricted to lower temperatures and pressures. In addition, there is no loss of volatile matter from these sealed vessels, and the sensitive parts of a microwave oven are not subjected to corrosive acid fumes.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eThe rapid cycle time (approximately 20 to 30 minutes, including time for cooling) offered by this procedure allows digestions to be carried out in multiple steps, if desired, either for analytical or safety reasons. Acid can be added in several steps, or different acids can be added to dissolve inorganics after an organic matrix has been destroyed.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eEqually important in the list of advantages offered by these vessels is the elimination of all metal from the vessel structure. With all body parts made of a high strength polymer there are no metal parts subject to corrosion, as with metal jacketed vessels, and no possible sources of metallic ion contamination.\u003c\/p\u003e\n\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eUnique Safety Features\u003c\/h3\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eSeveral unique sealing and safety features have been incorporated into the design of these vessels. The PTFE sample cup is closed with a self- sealing, PTFE O-ring that eliminates the need to pre-load the cup in order to secure a tight seal. This also eliminates the effects of differential thermal expansion during heating and cooling cycles while providing a chemically inert, all PTFE system.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eFor overpressure protection, the closure in these vessels includes a compressible relief disc that operates in conjunction with the O-ring cup seal to release any excessive pressure if it should develop to a point at which it might destroy the vessel and oven. When pressure in the vessel reaches approximately 1500 psi, the relief disc will be compressed sufficiently to release the support for the O-ring. At this point, the unsupported O-ring will blow out, releasing pressure from within the cup. In most cases all parts of the vessel except the O-ring will be reuseable after this event if they are promptly and carefully cleaned and inspected following the pressure release.\u003c\/p\u003e\n\u003ch4 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eA Built-In Pressure Indicator\u003c\/h4\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eAs pressure in the sample cup increases and the relief disc is compressed, a retaining screw, which is normally flush with the top of the vessel cap, will protrude above the top surface. The head of this screw will rise approximately 1\/32 inch for each 500 psi of pressure in the vessel. Thus, by monitoring the extension of the screw head, the user will have a visual estimation of the pressure within the vessel.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eThis release mechanism has been designed to protect against the relatively gradual pressure build-up that can result from overheating the contents of the vessel. But no relief mechanism can protect against the destructive forces produced by materials that detonate or explode within a vessel of this type.\u003c\/p\u003e\n\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eA Microwave Transparent Body\u003c\/h3\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eThe body and screw cap for these vessels are made of a microwave-transparent polymer which has good mechanical strength at temperatures up to 150 °C, and which serves also as an excellent heat insulator for the PTFE sample cup. Since heating is developed internally within the cup, temperatures in the outer, high strength body will seldom exceed 50 °C.\u003c\/p\u003e\n\u003ch3 style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 18.73px; font-style: normal; font-variant: normal; font-weight: bold; letter-spacing: normal; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003ePressure and Temperature Limits\u003c\/h3\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eWorking pressures up to 1200 psi (8.27 Mpa) and reactant temperatures up to 250 °C can be developed safely in these vessels, but these limits must not be exceeded. Obviously, it is much easier to specify these limits than it is to describe how to ensure that they are carefully observed, since there is no pressure gage on these vessels and no internal temperature probe. Actually, the 1200 psi pressure rating assumes that the containment parts of the vessel will always remain at temperatures below 50 °C. This will normally be the case, since microwave energy is directed into the sample itself and not into the containment vessel. Although high temperatures are developed within the sample, this is accomplished without the introduction of large amounts of heat. The energy that is directed into the sample is rapidly dissipated into the PTFE cup and the outer vessel. The vessel itself will become warm to the touch as the contents cool, but it should not reach temperatures above 50 °C.\u003c\/p\u003e\n\u003cp style=\"box-sizing: inherit; color: #404040; font-family: \u0026amp;quot; source sans pro\u0026amp;quot;,san-serif; font-size: 16px; font-style: normal; font-variant: normal; font-weight: 400; letter-spacing: normal; margin-bottom: 1.5em; orphans: 2; text-align: left; text-decoration: none; text-indent: 0px; text-transform: none; -webkit-text-stroke-width: 0px; white-space: normal; word-spacing: 0px;\"\u003eUsers can get a preliminary estimate of the effective heating rate of their microwave oven by heating a small amount of the sample and its digestion medium in an open PTFE cup, and observing the time required to bring the medium to boiling. Most domestic ovens will generate internal temperatures in the range of 200 °C within one minute when using the 4781 or 4782 Vessel. More powerful units will be significantly faster. After removing the vessel from the oven it normally will cool down to ambient temperature within 20 or 30 minutes with forced air circulation. Excessive deformation of the cup, its sealing ring, or significant acid leakage are clear indications that excessive temperatures and\/or pressures are being generated.\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111603142971,"sku":"PAR-4782-EA","price":895.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-4782_330a545c-476c-4607-ab5a-c49166ca0cf2.png?v=1784720213"},{"product_id":"replacement-ptfe-cup-with-cover-23-ml-for-use-with-par-4749-acid-digestion-vessel-parr-instruments-a280ac","title":"Replacement PTFE Cup with Cover, 23 mL for Use with PAR-4749 Acid Digestion Vessel, Parr Instruments, A280AC","description":"\u003cp\u003e\u003cstrong\u003eParr Instrument Company® Replacement PTFE Cup with Cover, 23 mL for Use with PAR-4749 Acid Digestion Vessel, A280AC\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWe are proud suppliers of Parr instruments, replacement parts, accessories and consumables\u003c\/li\u003e\n\u003cli\u003ePlease contact one of our knowledgeable sales team for assistance if you do not see what you need\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111603929403,"sku":"PAR-A280AC-EA","price":160.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-A280AC_9b90049f-e621-4b72-a4ad-a6383d41aae6.png?v=1784720235"},{"product_id":"replacement-ptfe-cup-with-cover-45-ml-for-use-with-par-4744-acid-digestion-vessel-parr-instruments-a280ac2","title":"Replacement PTFE Cup with Cover, 45 mL for Use with PAR-4744 Acid Digestion Vessel, Parr Instruments, A280AC2","description":"\u003cp\u003e\u003cstrong\u003eParr Instrument Company® Replacement PTFE Cup with Cover, 45 mL for Use with PAR-4744 Acid Digestion Vessel, A280AC2\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eWe are proud suppliers of Parr instruments, replacement parts, accessories and consumables\u003c\/li\u003e\n\u003cli\u003ePlease contact one of our knowledgeable sales team for assistance if you do not see what you need\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111603994939,"sku":"PAR-A280AC2-EA","price":205.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-A280AC2.png?v=1784720236"},{"product_id":"replacement-ptfe-cup-with-cover-125-ml-for-4748-acid-digestion-vessel-parr-instruments-a305ac","title":"Replacement PTFE Cup with Cover, 125 mL, for 4748 Acid Digestion Vessel, Parr Instruments, A305AC","description":"\u003cp\u003e\u003cstrong\u003eParr Instruments® Replacement PTFE Cup with Cover, 125 mL, for 4748 Acid Digestion Vessel, A305AC\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMade from Polytetrafluoroethylene (PTFE) which has unique properties that include nonreactivity, hydrophobicity, low coefficient of friction, and good insulating properties\u003c\/li\u003e \u003c\/ul\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111604027707,"sku":"PAR-A305AC-EA","price":405.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-A305AC.png?v=1784720237"},{"product_id":"cup-cover-and-o-ring-for-45-ml-acid-digestion-vessel-ptfe-parr-a328ac2","title":"Cup, Cover and O-Ring for 45 mL Acid Digestion Vessel, PTFE, PARR A328AC2","description":"\u003cp\u003eThank you for visiting our website.  We offer more than 100,000 products.  If you do not see what you are looking for or need more information on a product, contact our knowledgeable sales team at preiser@preiser.com or call (800) 624-8285. We are constantly adding more products and updated information about the products on the website.\u003c\/p\u003e\u003cp\u003e\u003c\/p\u003e","brand":"Parr Instrument Company","offers":[{"title":"EA (1)","offer_id":51111604093243,"sku":"PAR-A328AC2-EA","price":158.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/files\/PAR-A328AC2_5a0dc7b4-1876-4a7b-a5a4-95c330a76a1a.png?v=1784720241"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0921\/2041\/6571\/collections\/3010804.jpg?v=1761685009","url":"https:\/\/preiser.com\/collections\/microwave-acid-digestion-acc.oembed","provider":"Preiser Scientific","version":"1.0","type":"link"}