New double-stage separation analysis method

Sugiyama, Kenkichi; Saito, Muneo; Hondo, Toshinobu; Senda, Masaaki

doi:10.1016/s0021-9673(01)83289-1

Cited by 117 publications

(17 citation statements)

References 38 publications

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“…SFE has been reviewed recently in the literature (2,3). The effect of added modifiers on supercritical CO, extraction of organic compounds from complex matrices has also been examined (5)(6)(7)10,11). Other supercritical fluids that have been used as extraction solvents include methanol (14), nitrous oxide (15), and ethane (15).…”

Section: Introductionmentioning

confidence: 99%

Supercritical fluid extraction of chlorpyrifos methyl from wheat at part per billion levels

Campbell

Meunier

Cortes

1989

J Microcolumn Separations

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Abstract. The use of supercritical fluid extraction (SFE) to recover pesticides from environmental matrices was investigated using chlorpyrifos methyl spiked on a wheat kernel substrate. Volume-based extraction recovery profiles were generated to determine the pressure, temperature, and fluid composition that yielded the maximum analyte recovery and minimum extraction time. On-line coupled microcolumn liquid chromatography-gas chromatography (LC-GC) with electron capture detection was used to effect cleanup of the extracts and to determine the recoveries of chlorpyrifos methyl.With unmodified CO, as the extraction solvent, we obtained only 65% recovery of chlorpyrifos methyl spiked at the 50 parts per billion (ppb) level on the wheat. The use of CO, mixed with 2% methanol, however, yielded recoveries averaging 97.8%, with a relative standard deviation of 4.0%. Extraction times were 10 min or less for a 1-g sample size. The use of PEEK sealing material in the extraction vessels and in the ferrules of the finger-tight fittings in the SFE system permitted rapid cycling between multiple samples and reliable, leak-free operation. This approach could significantly shorten the sample preparation time associated with pesticide residue analysis.

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Section: Introductionmentioning

confidence: 99%

Supercritical fluid extraction of chlorpyrifos methyl from wheat at part per billion levels

Campbell

Meunier

Cortes

1989

J Microcolumn Separations

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“…5 Since these studies were performed in view of analytical separation, they did not mean to recover sufficient amounts of extracts for further molecular spectroscopic analyses, such as infrared (IR) and nuclear magnetic resonance (NMR) spectrometry for identification.…”

Section: Fourier Transform Infraredmentioning

confidence: 99%

Infrared and Nuclear Magnetic Resonance Spectrometry of Caffeine in Roasted Coffee Beans after Separation by Preparative Supercritical Fluid Chromatography

Elisabeth

Yoshioka

Yamauchi³

et al. 1991

ANAL. SCI.

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“…Supercritical fluid extraction can be coupled to supercritical fluid chromatography using a series of switching valves and either a loop interface or an accumulator trap [257,260,[268][269][270][271][272][273]. In the loop interface the fluid from the extraction cell passes continuously through an injection loop and into a collection vessel.…”

Section: Supercritical Fluid Extractionmentioning

confidence: 99%

Sample Preparation for Chromatographic Analysis

Poole

1991

Chromatography Today

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New double-stage separation analysis method

Cited by 117 publications

References 38 publications

Supercritical fluid extraction of chlorpyrifos methyl from wheat at part per billion levels

Supercritical fluid extraction of chlorpyrifos methyl from wheat at part per billion levels

Infrared and Nuclear Magnetic Resonance Spectrometry of Caffeine in Roasted Coffee Beans after Separation by Preparative Supercritical Fluid Chromatography

Sample Preparation for Chromatographic Analysis

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