For any of the Sulfide methods, is there a way to remove a turbidity interference?

Document ID

Document ID TE6834

Published Date

Published Date 27/05/2017
Question
For any of the Sulfide methods, is there a way to remove a turbidity interference?
Summary
Turbidity interference removal in Sulfide methods
Answer
For any of the available Sulfide Methods, turbidity can be corrected with a prepared sulfide free blank. The procedure removes the sulfide from the sample but does not remove the turbidity or background color. The interference from turbidity or color will be corrected when the instrument is set to zero with this solution. The procedures is as follows:

1) Measure 25 mL of sample into a 50-mL Erlenmeyer flask.
2) Add Bromine Water, 30 g/L, 29mL (Catalog Number/Order Code 221120) by drops with constant swirling until a yellow color remains.
3) Add Phenol Solution, 30 g/L, 29mL (Catalog Number/Order Code 211220) by drops with constant swirling until the yellow color is removed.
4) Use this solution to replace the deionized water blank in the test procedure.