Alkalinity/Hardness, Drinking Water QC Knowns, Environmental Reference Materials, Inorganics, Water Chemistry CRMs Hardness QC #QCI-145 A 250mL ready to use CRM for determination of Calcium( 30-90ppm), Magnesium (2-20ppm), calcium hardness (75-225ppm) and total hardness ( 83-307ppm). Each concentrations listed on lot COA. read more This product is available for purchase on our new website at zeptometrix.com. Order online today or call our team at +1.800.274.5487. Catalog Number: QCI-145 Options 250 mL, 4 x 250 mL Related products Quick View Add to cart Compare Environmental Reference Materials Total Residual Chlorine Concentrate CRM 0.100 mg/L #QCI-183 Quick View Add to cart Compare Environmental Reference Materials Total Residual Chlorine Concentrate CRM 0.050 mg/L #QCI-182 Quick View Add to cart Compare Environmental Wastewater Standards Multi-Analyte Solids CRM #QCI-171 Quick View Add to cart Compare Environmental Reference Materials Demand QC Concentrate CRM #QCI-026
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