Purge-trap Gas Chromatography and Mass Spectrometric Method for Analysis of Isoprene in Natural Waters
10.11895/j.issn.0253-3820.140974
- VernacularTitle:吹扫捕集-气相色谱-质谱联用测定天然水体中异戊二烯的研究
- Author:
Honghai ZHANG
;
Jianlong LI
;
Guipeng YANG
;
Yuchen SONG
;
Na JIN
- Publication Type:Journal Article
- Keywords:
Isoprene;
Purge and trap system;
Gas chromatography-mass spectrometry;
Natural water
- From:
Chinese Journal of Analytical Chemistry
2015;(3):333-337
- CountryChina
- Language:Chinese
-
Abstract:
Gas chromatography with mass spectrum detector ( GC-MSD) coupled with purge-and-trap system was set up to analyze the concentration of isoprene in natural waters. The best experimental conditions were established, including purge gas flow rate ( 50 mL/min ) , purge time ( 15 min ) , the optimum capillary column ( Rt-Alumina BOND/KCl) and the appropriate condition of temperature programming. When analyzing isoprene in natural waters, the precision was <4% (n=6), the detection limit was 0. 5 pmol/L and the recovery was 91%-102%. The preservative experiment showed that there was no obvious variation in sample concentrations of isoprene within 60 days. The concentrations of isoprene measured with the method ranged from 60 . 8 to 278 . 7 pmol/L in the Jiaozhou Bay and its adjacent river estuaries and from 44 . 7 to 77 . 2 pmol/L in Yellow River estuary, which was in good accord with those results reported in literatures in other coastal waters. In conclusion, the analytical method could meet the requirements of the analysis of concentration of isoprene in natural waters.
