Title of article :
The evaluation of recovery rate associated with the use of thermal desorption systems for the analysis of atmospheric reduced sulfur compounds (RSC) using the GC/PFPD method
Author/Authors :
Kim، نويسنده , , Ki-Hyun and Ju، نويسنده , , Do-Weon and Joo، نويسنده , , Sang-Woo، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2005
Pages :
5
From page :
955
To page :
959
Abstract :
In this work, the recovery rate (RR) of preconcentration technique was examined using a combination of the Peltier cooling (PC) and thermal desorption (TD) system for the gas chromatographic (GC) analysis of reduced sulfur compounds (RSC) in air. The possible loss or gain of analytes resulting from the use of the PC/TD system was estimated by analyzing equimolar standards (10 ppm) of four S compounds including H2S, CH3SH, DMS, and DMDS in two different manners: (1) by injecting directly the four S compounds into the GC via injector and (2) by introducing them through the PC/TD system. When a series of tests were conducted on different types of gas media (ultrapure air versus N2) and across varying relative humidity (RH), it was found that the RR values for the four S compounds vary from 80 to 110% range. The overall results of our study thus indicate that the RR for the PC/TD system is fairly good and that subtle differences in their RR values may reflect the combined effects of different factors investigated in this study such as types of gas media, RH change, and properties of target analytes (e.g., recovery rate of the least (H2S) versus the highest compound (DMDS)).
Keywords :
Reduced sulfur compound (RSC) , Peltier , Recovery rate , thermal desorption , Hydrogen sulfide , GC/PFPD
Journal title :
Talanta
Serial Year :
2005
Journal title :
Talanta
Record number :
1674687
Link To Document :
بازگشت