1980 Volume 9 Issue 6 Pages 737-738
An improved gas chromatographic method is presented for the determination of trace amount of nitrite ion (NO2−) in water. The method is based on the Sandmeyer reaction, i.e., the diazotization of p-bromoaniline by NO2− followed by reaction with CuCl in hydrochloric acid to form p-bromochlorobenzene. The derivative is determined by gas chromatography, employing an electron capture detector. The detection limit for NO2− is 0.5 ng/ml (ppb).
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