How should the sample blank be prepared for the Nickel TNTplus Vial Test (0.1-6.0 mg/L Ni)?

Document ID

Document ID TE7247

Published Date

Published Date 04/16/2019
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Question
How should the sample blank be prepared for the Nickel TNTplus Vial Test (0.1-6.0 mg/L Ni)?
Summary
Sample blank for Nickel TNT856
Answer
To determine the sample blank for Nickel TNTplus Vial Test (0.1-6.0 mg/L Ni) (Product # TNT856), run the procedure as written in method 10220, but substitute 0.2 mL of deionized water in place of the 0.2 mL of Solution A in step 3. Use the red stopper to cap the sample vial. The value obtained in step 6 is then subtracted from the value obtained on the original sample to give the corrected sample concentration.

Alternatively, samples that contain only turbidity may be first filtered through a membrane filter and then analyzed. Report the results as soluble nickel.

Samples without color or turbidity do not require sample blanks.

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