COBALT
PAN METHOD · CODE 4851
QUANTITY CONTENTS CODE
60 mL *Cobalt Buffer *4852-H
60 mL *Cobalt Indicator Reagent *4853-H
30 mL *Stabilizer Solution *4854-G
2 Pipet, 1.0 mL, plastic 0354
1 Pipet, 0.5 mL, plastic 0353
Cobalt rarely occurs in natural water. It is used in the manufacture of alloys
to increase corrosion resistance and strength. It is found in wastewaters as a
corrosion by-product.
APPLICATION: Industrial wastewater.
RANGE: 0.00–2.00 ppm Cobalt
MDL: 0.04 ppm
METHOD: PAN (1-[2-Pyridylazo]-2-Naphthol) forms a greenish
complex with Cobalt (Co
+2
) at a pH of 5.
SAMPLE HANDLING
& PRESERVATION:
Store samples in acid-washed plastic bottles. Adjust
pH to less than 2 with nitric acid. Adjust sample pH to 5
before testing.
INTERFERENCES: Iron (+2) and high concentrations of heavy metals.
SMART3 Test Procedures 11.10 COBALT
Test Procedures
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