ORP Test and Pretreatment Solution Bottles Code Description Size Certificate of Analysis HI7021L 240 mV ORP solution for platinum and gold electrodes 500 mL on request HI7021M 240 mV ORP solution for platinum and gold electrodes 230 mL on request HI7022L 470 mV ORP solution for platinum and gold electrodes 500 mL on request HI70224L 470 mV ORP solution for platinum and gold electrodes 500 mL (Pool Line) on request HI7022M 470 mV ORP solution for platinum and gold electrodes 230 mL on request HI7091L reducing pretreatment solution (2 components) 500 mL + 14g (set) HI7092L oxidizing pretreatment solution for ORP electrodes 500 mL HI7092M oxidizing pretreatment solution for ORP electrodes 250 mL Sample Preparation Solution Bottles Code Description Size HI7051M soil sample preparation solution 230 mL HI7051L soil sample preparation solution 500 mL HI70960 preparation solution for solid or semi-solid samples 30 mL ORP and Sample Preparation Solutions • Safety Data Sheets · Safety data sheets for all Hanna solutions are available at hannainst.com or upon request. • Expiration date · The production batch number and expiration date are reported on all Hanna calibration solutions. • Air-tight bottles · Air-tight bottle with tamper-proof seal of freshness to ensure quality. ORP Test and Pretreatment Solutions ORP standard solutions allows users to test the precision of ORP electrodes. For example, by immersing the electrode in HI7021 solution, the reading should be at 240 mV (@25°C/77°F). If the reading is outside the indicated interval, clean and condition your ORP electrode in Hanna pretreatment solution. Use HI7092 for oxidizing or HI7091 for reducing pretreatment. Soil Sample Preparation Solution HI7051 Soil Sample Preparation Solution is an electrolyte solution used in the measurement of soil pH. The pH of soil is most commonly measured as either a water slurry or electrolyte slurry, where a set ratio of soil:solvent (solvent is water or electrolyte solution) is chosen; common ratios used for soil pH are 1:1, 1:2, or 1:5, where more solvent than soil is used when soils-to-beanalyzed contain high amounts of organic matter or clay. Use of an electrolyte solution is usually preferred as it is less affected by soil electrolyte concentration and provides a more consistent measurement for soils whose salt content may fluctuate as a result of seasonal conditions or crop residues. Using the HI7051 solution prior to taking a measurement provides for a more accurate pH reading of soil samples. ORP Test and Pretreatment Solution Sachets Code Description Size Package Certificate of Analysis HI70022P 470 mV ORP solution for platinum and gold electrodes 20 mL 25 pcs. • HI700224P 470 mV ORP solution for platinum and gold electrodes 20 mL (Pool Line) 25 pcs. • 2 pH 2.170 | www.hannainst.com solutions
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