价格：面议
0
联系人：
电话：
地址：
产品规格：
产品数量：
包装说明：
关 键 词：Cr6+
行 业：
发布时间：2010-12-20
Chromium (VI) Ion NO.273 Cr6+ Performance Measuring Range 0.5 to 50 mg/L Sampling Time 2 minutes Detecting Limit 0.4 mg/L Colour Change White → Yellow Reaction Principle Cr6+ + Pb(CH3COO)2 → PbCrO4 Shelf Life 3 Years Corrections for temperature & humidity Water temperature correction is necessary Store the tubes at cool and dark place. Possible coexisting substances and their interferences (NOTE) Substance Concentration Interference Change colour by itself to Cl- 20 mg/L + No CH3COO- 20 mg/L + No NO3- 30 mg/L + No S2- 0.5 mg/L Unclear Brown (0.5 mg/L ) SO42- 10 mg/L + No PO43- 5 mg/L + No
