Free radical cross-linking in the preparation of non-extractable stationay phases for capillary gas chromatography

Wright, Bob W.; Peaden, Allan W.; Lee, Milton L.; Stark, Thomas

doi:10.1016/s0021-9673(00)83735-8

Cited by 149 publications

(57 citation statements)

References 22 publications

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“…1A. The mechanism of the coating process, therefore, is not the same as reported before [21,22,27]. In order to increase the surface area and expose most of the Table 2 Peak height repeatability data for analytes and their detection limits…”

Section: The Sol-gel Chemistry Involved In the Creation Of Coating Layermentioning

confidence: 99%

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Preparation of stir bars for sorptive extraction using sol–gel technology

Liu

Wang

Guan

2004

Journal of Chromatography A

106

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Section: The Sol-gel Chemistry Involved In the Creation Of Coating Layermentioning

confidence: 99%

“…To date, static coating technology [20,21] and sol-gel coating technology [22,23] are commonly used in SE. Compared to static coating technology, sol-gel technology may be much more suitable for the preparation of thick film.…”

Section: Introductionmentioning

confidence: 99%

Preparation of stir bars for sorptive extraction using sol–gel technology

Liu

Wang

Guan

2004

Journal of Chromatography A

106

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“…Detector purge flow was 40 ml/min argon/methane (95/5 v/v). The fused silica capillary column was deactivated with octamethylcyclotetrasiloxane [5] and coated with SF.54, which was cross-linked with azo-tertbutane [5]. Helium was used as the carrier gas.…”

Section: Gas Chromatographymentioning

confidence: 99%

Hexachlorobenzene and 1, 1-di(4-Chlorophenyl)-2,2-Dichloroethene in Serum of Uremic Patients and Healthy Persons: Determination by Capillary Gas Chromatography and Electron Capture Detection

Rutten

Schoots

Vanholder

et al. 1988

Nephron

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The concentrations of organochlorine pesticides in serum have been determined by GC and electron capture detection. Studies were performed in 7 nondialyzed, 10 dialyzed and 6 healthy persons. Only hexachlorobenzene (HCB) and 1, 1-di(4-chlorophenyl)-2,2-dichloroethene (pp’-DDE) were consistently present. No interference by other pesticides or polychlorinated biphenyls was found by checking with GC-MS. For the nondialyzed uremic patients the average HCB concentration was 16.2 nmol/l (σ = 6.7, n = 7), and the pp’-DDE level 26.4 nmol/l (σ = 31.4, n = 7). For the dialyzed uremic patients the average HCB level was 15.5 nmol/l (σ = 11.2, n = 10) before dialysis and 17.2 nmol/l (σ = 14.4, n = 8) after dialysis, the concentration of pp’-DDE was 27.0 nmol/l (σ = 38.4, n = 10) before dialysis and 28.0 nmol/l (σ = 37.4, n = 8) after dialysis. For the healthy persons the average concentration of HCB was 7.7 nmol/l (σ = 1.8, n = 6) and the concentration of pp’-DDE was 20.1 nmol/l (σ = 10.4, n = 6). HCB concentrations were significantly higher in serum of dialyzed and nondialyzed uremic patients than in controls (Wilcoxon’s test).

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“…One major challenging area of microextraction devices is the sorbent coating technology that often use a dilute solution of pristine polymer to form a thin surface film on the substrate followed by a free radical cross-linking reaction to immobilize the film [17,18]. The weak physical adhesion of the polymer to the substrate results in a number of the unwanted phenomena such as high phase bleeding, washing away of the polymer with organic solvent, long extraction equilibrium time, limited selectivity, poor extraction reproducibility, and swelling of the sorbent when exposed to organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Fabric Phase Sorptive Extraction Explained

et al. 2017

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Abstract:The theory and working principle of fabric phase sorptive extraction (FPSE) is presented. FPSE innovatively integrates the benefits of sol-gel coating technology and the rich surface chemistry of cellulose/polyester/fiberglass fabrics, resulting in a microextraction device with very high sorbent loading in the form of an ultra-thin coating. This porous sorbent coating and the permeable substrate synergistically facilitate fast extraction equilibrium. The flexibility of the FPSE device allows its direct insertion into original, unmodified samples of different origin. Strong chemical bonding between the sol-gel sorbent and the fabric substrate permits the exposure of FPSE devices to any organic solvent for analyte back-extraction/elution. As a representative sorbent, sol-gel poly(ethylene glycol) coating was generated on cellulose substrates. Five (cm 2 ) segments of these coated fabrics were used as the FPSE devices for sample preparation using direct immersion mode. An important class of environmental pollutants-substituted phenols-was used as model compounds to evaluate the extraction performance of FPSE. The high primary contact surface area (PCSA) of the FPSE device and porous structure of the sol-gel coatings resulted in very high sample capacities and incredible extraction sensitivities in a relatively short period of time. Different extraction parameters were evaluated and optimized. The new extraction devices demonstrated part per trillion level detection limits for substitute phenols, a wide range of detection linearity, and good performance reproducibility.

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Free radical cross-linking in the preparation of non-extractable stationay phases for capillary gas chromatography

Cited by 149 publications

References 22 publications

Preparation of stir bars for sorptive extraction using sol–gel technology

Preparation of stir bars for sorptive extraction using sol–gel technology

Hexachlorobenzene and 1, 1-di(4-Chlorophenyl)-2,2-Dichloroethene in Serum of Uremic Patients and Healthy Persons: Determination by Capillary Gas Chromatography and Electron Capture Detection

Fabric Phase Sorptive Extraction Explained

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