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Summary of Method
Required Reagents
Description
Nickel Reagent Set (100 Tests) .......................................................................................................................26516-00
Includes:
(2) EDTA Reagent Powder Pillows.................................................. 2 pillows ......... 100/pkg...............7005-99
(2) Phthalate-Phosphate Reagent Powder Pillows........................ 2 pillows ......... 100/pkg.............26151-99
(1) PAN Indicator Solution, 0.3% ..................................................... 1 mL ................ 100 mL MDB.....21502-32
Water, deionized ....................................................................................... 25 mL .............. 4 liters ....................272-56
Required Apparatus
Sample Cells, 10-mL, w/cap................................................................... 2 ....................... 6/pkg.................24276-06
Required Standards
Nickel Standard Solution, 1000-mg/L Ni (NIST) .......................................................... 100 mL...............14176-42
Nickel Standard Solution, 50-mg/L Ni (NIST), 10-mL Ampules................................ 16/pkg...............25576-10
Nickel_PP_Other_PAN_Eng_Ody.fm
After buffering the sample and masking any Fe
nickel is reacted with 1-(2-Pyridylazo)-2-Naphthol indicator. The indicator forms
complexes with most metals present. After color development, EDTA is added to
destroy all metal-PAN complexes except nickel and cobalt. The instrument
automatically adjusts for cobalt interference by measuring the absorbance of the
sample at both 560 nm and 620 nm. This method is unique because both nickel
and cobalt can be determined on the same sample.
3+
with pyrophosphate, the
Quantity Required
per test
Unit
Nickel
Cat. No.
Nickel
Page 5 of 6
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