Sensitive colorimetric determination of ammonium ion in water by laser photothermal detection
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 116 (1) , 77-79
- https://doi.org/10.1039/an9911600077
Abstract
Photothermal beam deflection was combined with the established and proven indophenol colorimetric method for the measurement of trace amounts of ammonium ion in water. A 7 mW 632 nm He–Ne laser and a 4 mW 780 nm Al–Ga–As semiconductor laser provided a limit of detection below 0.25 mmol m–3.Keywords
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