What is the correct test to use if the sample water contains condensed phosphates?

Document ID

Document ID TE367

Published Date

Published Date 09/10/2020
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Question
What is the correct test to use if the sample water contains condensed phosphates?
Summary
Testing phosphorous when the water contains condensed phosphates
Answer
Phosphates which are condensed (meta-, pyro-, and polyphosphates) are inorganic and must be hydrolyzed to orthophosphate using acid and heat. The Hach method 8180 utilizes an acid persulfate digestion followed by PhosVer® 3 chemistry and should be used for condensed phosphates.

This procedure can be found at www.hach.com/WAH

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