[Determination of trace ammonia in indoor air by ninhydrin spectrophotometry].


OBJECTIVE To develop a new spectrophotometric method to detect trace ammonia in indoor air. METHODS Ammonia in the air was absorbed by 0.01 mol/L sulfuric acid in a bubbling absorption tube. With 95 degrees C of water bath and pH 5.5-6.0 of buffer solution of acetic acid-sodium acetate, the ammonium in the solution reacted with ninhydrin at the presence… (More)


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@article{Li2008DeterminationOT, title={[Determination of trace ammonia in indoor air by ninhydrin spectrophotometry].}, author={Yang Li and Yi Liu and Cheng-jun Sun}, journal={Sichuan da xue xue bao. Yi xue ban = Journal of Sichuan University. Medical science edition}, year={2008}, volume={39 4}, pages={664-6} }