Can sulfide interfere with Copper methods?

Document ID

Document ID TE262

Version

Version 4.0

Status

Status Published

Published Date

Published Date 10/02/2018
Question
Can sulfide interfere with Copper methods?
Summary
Sulfide interference in copper measurement
Answer
Sulfide can interfere, but the concentration of sulfide is not documented. To treat this interference perform a digestion or follow the sulfide pretreatment steps explained below:

Measure 25mL of sample into a 50mL beaker. Swirling constantly, add Bromine Water, 30 g/L, 29 mL (Product # 221120) drop-wise until a yellow color remains. Swirling constantly, add Phenol Solution, 30 g/L, 29 mL (Product # 211220) drop-wise just until the yellow color disappears (more than likely, only one drop will be needed). Use the test procedure to measure the concentration of the treated sample.

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