Determination of benzene, toluene, ethylbenzene and xylene in field and laboratory by means of cold fiber SPME equipped with thermoelectric cooler and GC/FID method

Abstract

A simple and effective cooling device based on a thermoelectric cooler was applied to cool the SPME fi ber. The device was used for quantitative extraction of aromatic hydrocarbons in the air. Several factors such as coating temperature, extraction temperature and relative humidity in the laboratory setting were optimized. Comparison of the results between the cold fi ber SPME (CF-SPME) and NIOSH 1501 method on standard test atmosphere indicated a satisfactory agreement. The CF-SPME and SPME method were also compared. The results revealed that CF-SPME has the most appropriate outcome for the extraction of aromatic hydrocarbons from the ambient air. The cold fi ber SPME technique showed good results for several validation parameters. Under the optimized conditions, the limits of detection (LOD) and the limits of quantifi cation (LOQ) ranged from 0.00019 to 0.00033 and 0.0006 to 0.001 ng ml -1 , respectively. The intra-day relative standard deviation (RSD) showed ranging from 4.8 to 10.5%.

Development of Cold Fiber Head Space Solid-Phase Microextraction for Analysis of 2,5 Hexandion in Urine

“…The thermoelectric cooler (TEC) was used to cool the SPME fiber. Detailed information on the design and structure of the thermoelectric cooler has been published elsewhere [25,26]. The temperature of fiber in TEC cooler was controlled by a fan and heat-dissipating silicon-oil based thermal grease.…”

“…A new thermoelectric cooler (TEC) was introduced to cool the SPME fiber for determination of hexanal, nonanal, and undecanal in rice samples and then applied to determination of BTEX in ambient air [25,26]. The cooler can control the fiber temperature, has no moving parts, and it is small, lightweight, easy to move around the laboratory and environmentally safe.…”