How do you prepare 1000 ppm sodium nitrite?

1. Weigh 0,1 g of dry ultra pure sodium nitrite (NaNO2) on a metrologically checked analytical balance.

2. Dissolve the weighed sodium nitrite in 1oo mL distilled water in a 1 L volumetric flask.

3. Put the volumetric flask in a water bath at 20 0C and maintain at this temperature 30 min.

4. Add slowly distilled water up to the mark.

5. Put the cap on the flask and stir vigorously 1 min.

6. Transfer the solution in a glass or plastic container.

7. Attach a label with: name and concentration of the solution, data, name of the operator.