| Autor: |
Jean Morvan, Alain Laplanche, Christophe Maris, Marianne Bloquel |
| Rok vydání: |
1999 |
| Předmět: |
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| Zdroj: |
Journal of Chromatography A. 846:331-339 |
| ISSN: |
0021-9673 |
| DOI: |
10.1016/s0021-9673(99)00403-3 |
| Popis: |
Static headspace preconcentration was developed for the gas chromatographic analysis of aliphatic amines in aqueous samples. A liquid–gas ratio of 1, an incubation temperature of 80°C (15 min), a pH of 13.7 and a mixture of salts (NaCl and K2SO4) at saturation concentration gave a maximal headspace amine concentration. C1–C4 volatile aliphatic amines were separated on a specific PoraPLOT Amines capillary column. The detection limit was 0.2 μg/l for secondary and tertiary amines using a nitrogen–phosphorus detector. Primary amines were detected at higher concentrations (from 10 μg/l to 3000 μg/l). This polar capillary column required the systematic addition of ammonia to the sample (0.05 M concentration) in order to obtain a good repeatability (RSD=0.6–6.4%). This technique has been applied successfully for the monitoring of amine concentration at sub-μg/m3 level in a compost treatment plant using absorption sampling in a hydrochloric acid solution. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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