Specification of DO TEST KIT CHEMETRICS K7512 TeST KIT

Oxygen, dissolved — CHEMets® Visual Kit

Catalog No.: K-7512

Range: 1-12 ppm

MDL: 1 ppm

Method: Indigo Carmine

30 tests

The dissolved oxygen test kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Comparator, 25 mL sample cup, and instructions. 

The Indigo Carmine Method

References: ASTM D 888-87, Dissolved Oxygen in Water, Test Method A. Gilbert, T. W., Behymer, T. D.,Castañeda, H. B., “Determination of Dissolved Oxygen

in Natural and Wastewaters,” American Laboratory, March 1982, pp. 119-134.

Test kits for environmental and drinking water applications (ppm range) employ the indigo carmine method.

The reduced form of indigo carmine reacts with D.O. to form a blue product. The indigo carmine methodology is not subject to interferences from temperature, salinity,

or dissolved gases such as sulfide, which plague users of D.O. meters. Results are expressed as ppm (mg/L) O2.