Alkalinity/Hardness, Drinking Water QC Knowns, Environmental Reference Materials, Inorganics, Water Chemistry CRMs Hardness QC #QCI-145 $70.00 – $247.00 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 Options Choose an option250 mL4 x 250 mLClear Add to cart Compare Catalog Number: QCI-145 Options 250 mL, 4 x 250 mL Related products Quick View Choose Options Compare $45.00 – $102.00 Environmental Reference Materials Silver – HNO3 #TM-023L Quick View Choose Options Compare $45.00 – $102.00 Environmental Reference Materials Copper – ICP CRM #TM-009L Quick View Choose Options Compare $45.00 – $102.00 Environmental Reference Materials Beryllium CRM #TM-005L Quick View Choose Options Compare $45.00 – $102.00 Environmental Reference Materials Strontium – HNO3 #TM-016L
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