Selected concentration techniques for gas chromatographic analysis of environmental samples

Rapid recognition of isomers of monochlorobiphenyls at trace levels by surface-enhanced Raman scattering using Ag nanorods as a substrate

“…and cause severe health problems when they exceed the critical dose [1][2][3]. Currently, a combination of high-resolution gas chromatography and mass spectrometry is widely used as a powerful means for the detection of these compounds; this method is, however, expensive and time-consuming, and is not always able to distinguish isomers [4][5][6][7].…”

Optimization and application of accelerated solvent extraction for rapid quantification of PCBs in food packaging materials using GC-ECD

“…For gas chromatography, an electron capture detector (ECD) was selected due to high sensitivity and precision (Li, Zhang, & Zhang, 2008;Namiesnik & Zygmunt, 2002;Rezaei, Bidari, & Birjandi, 2008;Tang, Chen, & Shao, 2004). However, in the case of impurities coexisting, samples have to be pretreated prior to GC analysis.…”

Detection of poultry spoilage markers from headspace analysis with cryoadsorption on a short alumina PLOT column

“…Static methods typically involve pressurising a vial containing the sample and then sampling with either a gas-tight syringe, a multiport sampling valve, or with solid phase microextraction (SPME) (Pawliszyn, 1997;Wercinski, 1999). Dynamic methods typically involve applying a flow of carrier, or sweep, gas to the vial containing the sample and passing the sweep gas (along with any VOCs in the headspace) out of the sample matrix and vial and through either a cryostat, adsorbent, or solvent to collect the VOCs (Bruno, 2009 (Boswell, 1999;Helmig, 1999;Ioffe et al, 1984;Namiesnik & Zygmut, 2002;Preito et al, 2000). Headspace analysis has been used by several research groups to investigate the VOCs emitted from meat, e.g., pork and poultry, under different packaging and storage conditions (Ahn, Nam, Du, & Jo, 2001;Olsen et al, 2005;Senter, Arnold, & Chew, 2000).…”