Chromium, Hexavalent
Chromium, Hexavalent
ChromiumHex_AVPP_Other_DCH_Eng_Ody.fm Page 5 of 6
Summary of Method
Hexavalent chromium is determined by the 1,5-Diphenylcarbohydrazide
method using a single dry powder formulation called ChromaVer 3 Chromium
Reagent. This reagent contains an acidic buffer combined with
1,5-Diphenylcarbohydrazide, which reacts to give a purple color when
hexavalent chromium is present. Test results are measured at 540 nm.
Required Reagents
Quantity Required
Description per test Unit Cat. No.
ChromaVer
®
3 Chromium Reagent Powder Pillows ..........................1 pillow........... 100/pkg.............12710-99
or
ChromaVer
®
3 AccuVac
®
Ampuls .........................................................1 ampule......... 25/pkg...............25050-25
Water, deionized ................................................................................................................. 4 liters ....................272-56
Required Apparatus
Sample Cells, 10-mL, w/cap...................................................................2 ....................... 6/pkg.................24276-06
Beaker, 50-mL ...........................................................................................1 ....................... each.................... 500-41H
Required Standards
Chromium, Hexavalent Standard Solution, 10-mL Voluette
®
Ampules,
12.5-mg/L Cr
6+
............................................................................................................. 16/pkg...............14256-10
Chromium, Hexavalent Standard Solution, Chromium, Standard Solution,
50.0-mg/L Cr
6+
............................................................................................................. 100 mL............... 810-42H
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