MSDS (Material Safety Data Sheet)
EM Quant® Chromate Test, Catalog No. 10012Test strips and reagent for the detection and semi-quantitative determination of chromate ions GeneralThe Chromate Test can be used to monitor waste water discharged from electroplating and pickling plants, tanneries, etc. and for rapidly and reliably determining chromium salts in many industrial processes. Principle of the MethodThe basis of the test is a redox reaction between chromate ions and diphenylcarbazide. In an acidic solution, chromate ions oxidize diphenylcarbazide to diphenylcarbazone and this in turn to diphenylcarbadiazone. Chromium(III) ions thus formed react with the enol form of diphenylcarbazone to produce a red-violet complex. Graduation0 - 3 - 10 - 30 - 100mg/l (ppm) CrO42- Directions
NoteCr3+ ions can also be determined with the chromate (Cr6+) test if they are oxidized to chromate by the following method: Safety PrecautionsKeep the reagent (25% sulfuric acid) away from the skin. In the event of contact, rinse well immediately with plenty of water. Seek immediate medical attention of substance enters the eye. Influence of AnionsThe determination is not disturbed by less than 1000mg/l Br-, BrO3-, Cl-, ClO3-, ClO4-, CN-, F-, I-, N3-, NO2-, NO3-, OCN- , PO43-, SCN- , SeO32- , SO42-, S2O82-, WO42-, acetate, citrate, oxalate, succinate or tartrate. [Fe(CN)6]4-, S2-, SO32-, S2O42-, S2O52- and ascorbate reduce CrO4O2- to Cr3+ (see Note). Influence of CationsThe determination is not disturbed by less than 1000mg/l Ag+, Al3+, Ba2+, Be2+, Ca2+, Cd2+, Ce3+, Co2+, Cr3+, Mg2+, Mn2+, Ni2+, Ni2+, Rb+, Sr2+, Ti4+, Ti+, Zn2+, or Zr4+ Elimination of InterferenceProceed as follows with 5ml of the solution to be tested: Standard (1000 mg/l)19780 Chromate Standard Solutions, 500ml |
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