Hach 59530-16, Instruction Manual

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Zinc,
continued
Summary of Method
Zinc and other metals in the sample are complexed with cyanide. The addition of
cyclohexanone causes a selective release of zinc. The zinc then reacts with
2-carboxy-2'-hydroxy-5'-sulfoformazyl benzene (Zincon) indicator to form a
blue-colored species. The blue color is masked by the brown color from the
excess indicator. The intensity of the blue color is proportional to the amount of
zinc present.
Reagents and Apparatus
Required Reagents
Description Cat. No.
Zinc Reagent Set (100 tests) ............................................................................24293-00
Includes:
(1) Cyclohexanone, 100 mL MDB
(1) ZincoVer® 5 Reagent Powder Pillows, 100/pkg
Required Apparatus
Cylinder, graduated mixing, 25-mL ................................................. each .....20886-40