Determination of ammonium sulfamate in air using ion chromatography

A sampling and analysis method has been deveoped and validated for ammonium sulfamate (ammate), NH+4 [NH2SO-3], in air samples. Airborne particulate ammate is efficiently collected using a mixed cellulose ester membrane filter, extracted from the filter using distilled water and determined in the extract by analysis for the sulfamate ion using ion chromatography. The method was validated over the concentration range of 6.35-27.3 mg/m3 at near ambient conditions, using laboratory generated air samples. The average recovery of the total method is 100+/- 6% at the 95% confidence level.