Pretreatment Oxidizing Solution, 500 mL, Hanna Instruments, HI7092L

Hanna Instruments® Pretreatment Oxidizing Solution, 500 mL, HI7092L

Features:

• Appearance:  colorless liquid
• CAS Nos.: 
  • Sodium Hypochlorite:  7681-52-9
• Pretreatment for ORP electrodes
• Air tight seal to ensure quality
• Expiration date and lot number stamped on bottle
• ORP (Oxidation Reduction Potential) electrodes are used to measure chemical reaction in which one species is being oxidized and another is being reduced
• Loss of electrons by element or compound is known as oxidation reaction while gaining of electrons by element or compound is known as reduction reaction
• For example, plating companies that have hexavalent chromium (Cr⁶⁺) in their wastewater must reduce it to a safer trivalent chromium (Cr³⁺) form
• This reduction reaction occurs in presence of a strong reductant such as sodium metabisulfite
• Addition of reductant must be measured with an ORP electrode to ensure that there is an adequate reducing potential
• Reducing pretreatment solution prior to taking a measurement provides for a faster response time in a reducing environment
• To use, soak the ORP electrode in the pretreatment solution for 15 minutes prior to use
• As a general rule, if mV reading corresponding to the pH measurement is lower than value in table below, HI7091L (92-1624-33) reducing pretreatment solution is used
• If mV reading corresponding to pH measurement is higher than value in table below, HI7092L (92-1624-32) oxidizing pretreatment should be used