scholarly journals Determination of Mercury in Real Water Samples Using in situ Derivatization Followed by Sol-Gel-Solid-Phase Microextraction with Gas Chromatography-Flame Ionization Detection

2012 ◽  
Vol 52 (1) ◽  
pp. 81-87 ◽  
Author(s):  
A. Sarafraz-Yazdi ◽  
E. Fatehyan ◽  
A. Amiri
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Sol Gel ◽  
Flame Ionization Detection ◽  
Real Water Samples ◽  
Flame Ionization ◽  
In Situ Derivatization

scholarly journals Determination of Volatile Residual Solvents in Traditional Chinese Medicines by Headspace Solid-Phase Microextraction and Cryogenic Gas Chromatography with Flame Ionization Detection

2003 ◽  
Vol 86 (3) ◽  
pp. 461-466
Author(s):  
Jiemin Liu ◽  
Qunfang Zhou ◽  
Guibin Jiang ◽  
Jingfu Liu ◽  
Jiyan Liu ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Traditional Chinese Medicines ◽  
Flame Ionization Detection ◽  
Chinese Medicines ◽  
Headspace Solid Phase Microextraction ◽  
Residual Solvents ◽  
Flame Ionization

Abstract A method based on headspace solid-phase microextraction and cryogenic gas chromatography with flame ionization detection was developed for the determination of volatile residual solvents in traditional Chinese medicines. A laboratory-made cryogenic chromatographic system was used for the separation of 15 kinds of residual solvents. During the analysis, a 65 μm PDMS/DVB fiber was used to extract the residual solvents, the extraction time was controlled at 0°C for 15 min, and the NaCl content of the sample was maintained at 30%. The limits of detection ranged from 0.08 (for octane) to 5000 μg/L (for ethanol), and the relative standard deviations were <8%. The recoveries from spiked samples ranged from 88 to 112%. Trace levels of residual solvents in several traditional Chinese medicines were effectively identified and quantified.

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