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- Author:
- Es-haghi, Ali; Baghernejad, Masoud; Bagheri, Habib
- Source:
- Analytica chimica acta 2012 v.742 pp. 17-21
- ISSN:
- 0003-2670
- Subject:
- air; coatings; correlation; derivatization; desorption; detection limit; gas chromatography-mass spectrometry; monitoring; phenol; polyethylene glycol; rapid methods; solid phase microextraction; temperature
- Abstract:
- ... A method based on solid-phase microextraction (SPME) followed by on-fiber derivatization and gas chromatography–mass spectrometry detection (GC–MS) for determination of phenol in air was developed. Three different types of SPME fibers, polar and non-polar poly(dimethylsiloxane) (PDMS) and polyethylene glycol (PEG) were synthesized using sol–gel technology and their feasibility to the sampling of p ...
- DOI:
- 10.1016/j.aca.2012.01.002
-
http://dx.doi.org/10.1016/j.aca.2012.01.002
- Author:
- Cochran, R.E.; Dongari, N.; Jeong, H.; Beránek, J.; Haddadi, S.; Shipp, J.; Kubátová, A.
- Source:
- Analytica chimica acta 2012 v.740 pp. 93-103
- ISSN:
- 0003-2670
- Subject:
- air; derivatization; gas chromatography-mass spectrometry; ionization; methane; monitoring; oxidation; particulates; polycyclic aromatic hydrocarbons; smoke; solid phase extraction; temperature
- Abstract:
- ... A sensitive method has been developed for the trace analysis of PAHs and their oxidation products (i.e., nitro-, oxy-, and hydroxy-PAHs) in air particulate matter (PM). Following PM extraction, PAHs, nitro-, oxy-, and hydroxy-PAHs were fractionated using solid phase extraction (SPE) based on their polarities. Gas chromatography–mass spectrometry (GC–MS) conditions were optimized, addressing inject ...
- DOI:
- 10.1016/j.aca.2012.05.050
-
http://dx.doi.org/10.1016/j.aca.2012.05.050
- Author:
- Tournebize, Aurélien; Wong-Wah-Chung, Pascal; Thérias, Sandrine; Bussière, Pierre-Olivier; Rivaton, Agnès; Caron, Thomas; Serein-Spirau, Françoise; Lère-Porte, Jean-Pierre; Montméat, Pierre; Gardette, Jean-Luc
- Source:
- Polymer degradation and stability 2012 v.97 no.8 pp. 1355-1365
- ISSN:
- 0141-3910
- Subject:
- air; chemical structure; derivatization; explosives; fluorescence; gas chromatography-mass spectrometry; headspace analysis; infrared spectroscopy; irradiation; oxidation; photoaging; photolysis; polymers; solid phase microextraction
- Abstract:
- ... This paper is devoted to the study of the photodegradation of pi-conjugated fluorescent materials used as chemical sensors for explosives detection. The selected pi-conjugated fluorescent material was a phenylene–ethynylene diimine with di-ether substituents (PH-DE-DI). A rapid disappearance of the fluorescence emission occurred when the material was exposed to solar light in ambient air. To under ...
- DOI:
- 10.1016/j.polymdegradstab.2012.05.026
-
http://dx.doi.org/10.1016/j.polymdegradstab.2012.05.026
- Author:
- Pang, Xiaobing; Lewis, Alastair C.
- Source:
- Analytical methods 2012 v.4 no.7 pp. 2013-2020
- ISSN:
- 1759-9679
- Subject:
- acetaldehyde; acetone; air; automation; calibration; derivatization; detection limit; formaldehyde; gas chromatography-mass spectrometry; heat transfer; hydrazones; mixing; mixing ratio; recycling; temperature
- Abstract:
- ... A microfluidic lab-on-chip derivatisation technique has been optimized to achieve a rapid, automated and sensitive determination of ambient gaseous formaldehyde when used in combination with GC-MS. The method used a Pyrex micro-reactor comprising three inlets and one outlet, gas and fluid splitting and combining channels, mixing junctions, and a 2.0 m long, 620 μm internal diameter reaction micro- ...
- DOI:
- 10.1039/c2ay25028d
-
http://dx.doi.org/10.1039/c2ay25028d
- Author:
- Terzic, Oliver; Swahn, Irvine; Cretu, Gheorghita; Palit, Meehir; Mallard, Gary
- Source:
- Journal of chromatography 2012 v.1225 pp. 182-192
- ISSN:
- 0021-9673
- Subject:
- air; cooling; derivatization; desorption; detection limit; gas chromatography-mass spectrometry; vapors
- Abstract:
- ... A sensitive gas chromatography–mass spectrometry (GC–MS) based analytical method was developed for detection of the chemical warfare agents (CWA) and related compounds in air/vapor samples. The method uses a Tenax TA packed GC liner as an air/vapor sampling tube and Programmable Temperature-Vaporization (PTV) GC inlet as the thermal desorber. This approach eliminates secondary focusing step and al ...
- DOI:
- 10.1016/j.chroma.2012.01.003
-
http://dx.doi.org/10.1016/j.chroma.2012.01.003