LCK337 Nickel Cuvette Test, 0.1-6.0 mg/L Ni

13mm LCK337 Cuvette test measures 0.1-6.0 mg/L Ni and 0.12-7.20 mg/L Ni in wastewater and drinking water. The product uses dimethylglyoxime method (DIN 38406-E11). Article LCK337 can be used to evaluate up to 25 tests. The product may be evaluated using following instruments: DR3900, DR6000, DR1900, DR2800, DR3800 and DR5000.

Before you start take into account the following:

• Undissolved nickel or nickel contained in complexes may be determined after digestion using Crack-Set LCW902. 
• It is required to dilute the sample with distilled water, if the wastewater and drinking water sample contains nickel concentrations that exceed the measuring range.

Procedure for Ni determination

Pipet 2.0 mL of sample and close the cuvette. Invert the content of the cuvette a few times until the freeze-dried contents are eventually dissolved. After that open the cuvette and add 0.2 mL of solution A using pipette. Then close the cuvette and invert a few times. After 3 minutes, clean the cuvette from the outside and perform the sample analysis.

Summary of method

In the presence of an oxidizing agent, nickel ions enter into reaction with dimethylglyoxime in alkaline solution and form orange-brown complex. The color must be evaluated using Hach spectrophotometer.

Sample preparation

For the long-term preservation of the wastewater and drinking water sample, add nitric acid to reduce the pH to <2. The water sample containing nickel must be stored in container made of glass, polyethylene or borosilicate glass. LCK337 Cuvette test storage conditions are from 15 °C to 25 °C.