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Why we add ammonium molybdate to phosphorus solution at 450 nm ?

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Question added by Ahmed Seddik Aadli , chemistry lecturer , the Aluminium Technical Industrial Institution - Qena
Date Posted: 2014/07/06
Bilal Alkhizzi
by Bilal Alkhizzi , Administrative Manager , Itqan Medical Center

Ammonium molybdate reacts with phosphate to yield phosphomolybdate, which is a coloured complex that is easy to quantify spectrophotometrically by applying the Beer-Lambert law.

 

There are several other procedures that use this principle, but suggest to use wavelengths of,, and nm.

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