YSI 9300 Photometer User Manual
Page 130
Test Procedure
1
Fill test tube with sample to the 10 ml mark.
2
Add one Nickeltest No 1 tablet, crush and mix to dissolve. Ensure tablet is
completely dissolved before proceeding.
3
If iron is thought to be present in the sample, add one level spoonful of
Nickeltest PR powder and mix.
4
Add one Nickeltest No 2 tablet, crush and mix to dissolve.
5
Stand for two minutes to allow full color development.
6
Select Phot 53 on photometer.
7
Take photometer reading in usual manner (see photometer instructions).
8
The result is displayed as mg/l Ni.
Interferences
1
The presence of cobalt at 0.5 mg/l gives a positive response in the test.
2
The presence of significant levels of EDTA (at least 25 mg/l) complexes
nickel and reduces response in the test. Complexing agents used in water
treatment, such as polyphosphates, do not affect the results.
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