MadSci Network: Chemistry

Subject: Nitrate Test for Water

Date: Tue Jul 28 22:12:36 1998
Posted by Julia Wilson
Grade level: grad (science)
School: University of Manitoba
City: No city entered. State/Province: No state entered.
Country: No country entered.
Area of science: Chemistry
ID: 901681956.Ch

Does anyone know anything about the chemistry behind a the 
diphenylamine/KCl test for nitrates in water?  I work in an analytical 
lab and we have been trying unsuccessfully for three weeks to get the 
test to work.  A 0.2ppm and 0.3ppm standard solution is not turning 
blue.  No significant absorbance is found spectrophotometrically 

Thanks for your help in advance!

Re: Nitrate Test for Water

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