Determination of atmospheric isocyanate concentrations by high-performance thin-layer chromatography using 1-(2-pyridyl)piperazine reagent
ANALYSTANALYST Pub Date: DOI: 10.1039/AN9810600085
Abstract
A high-performance thin-layer chromatographic method is described for the determination of both aliphatic and aromatic isocyanates and their oligomers in air. The test atmosphere is drawn through a 2 × 10–4M solution of 1-(2-pyridyl)piperazine in toluene at a sampling rate of 1 l min–1 for 5–20 min. The sample solution is concentrated to 100 or 200 μl of which 1–5 μl are applied to a thin-layer plate, eluted and detected with iodoplatinate reagent. The sample spots may be measured visually or using a scanning densitometer. Concentrations down to 0.0003 p.p.m. (2 μg m–3) can be determined.
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CAS no.: 89640-58-4
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