Continuous-flow extraction of organophosphorus pesticides coupled on-line with high-performance liquid chromatography

Farrán, Adriana; Pablo, Joan de; Hernández, Santiago

doi:10.1016/s0003-2670(00)84134-3

Cited by 15 publications

(3 citation statements)

References 18 publications

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“…Classical T-piece segmentors made of glass (7,8), fluoroplastics (9, 10), and combinations of hydrophilic and lipophilic materials, improved glass A8-T and A10-T fittings (7,11,12), and fluoroplastics T-pieces with Teflon tubing inserts (6,9,13) or enlarged outflow channel inner diameter (14,15) are the most widely used. Different configurations of Y (16,17) or W pieces (18-21) made of glass or fluoroplastics and four-way fittings (22) have also been recommended. Lately, a falling drop segmentor was applied (23) to overcome some of the disadvantages of other types.…”

Section: Discussionmentioning

confidence: 99%

Design of coaxial segmentors for liquid-liquid extraction/flow-injection analysis

Kubáň¹,

Danielsson²,

Ingman³

1990

Anal. Chem.

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Section: Discussionmentioning

confidence: 99%

Design of coaxial segmentors for liquid-liquid extraction/flow-injection analysis

Kubáň¹,

Danielsson²,

Ingman³

1990

Anal. Chem.

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“…Flow techniques have been employed for the continuous extraction of pesticides in combination with a liquid chromatograph and UV (6), diode-array (7), or mass spectrometric detection (8). A gas chromatograph is more difficult to couple to a continuous system than is a liquid chromatograph (HPLC); as an obvious result, there is scantier literature on the former type of coupling.…”

Section: Introductionmentioning

confidence: 99%

“…c Preconcentration factor for a sample volume of 50 mL.20749 ENVIRONMENTAL SCIENCE & TECHNOLOGY / VOL. 30, NO 6,. 1996…”

mentioning

confidence: 99%

On-Line Preconcentration and Gas Chromatographic Determination of N-Methylcarbamates and Their Degradation Products in Aqueous Samples

Ballesteros

Gallego

Valcárcel

1996

Environ. Sci. Technol.

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A continuous liquid-solid extraction system coupled to a gas chromatograph for the preconcentration and determination of N-methylcarbamates and their corresponding phenols in water is reported. Various sorbent materials were assessed, of which XAD-2 provided the best results in the preconcentration of propoxur, carbofuran, carbaryl, 2-isopropoxyphenol, 3-hydroxycarbofuran, and 1-naphthol. The proposed method is highly sensitive to trace levels of the analytes; it features detection limits between 0.7 and 1 µg/L, which are substantially lower than those afforded by flame ionization detection. Changes in three river water samples containing only carbamate pesticides or phenols and pesticides plus their hydrolysis products (phenols) at the microgram per liter level were studied under natural conditions over a 6-week period; the rate of degradation was lower for the N-methylcarbamates than for their respective phenols. The proposed continuous system was evaluated for environmental samples without detectable residues of pesticides.

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Electroanalytical determination of diazinon: Direct current and differential pulse polarography and adsorptive stripping voltammetry

et al. 1990

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Continuous-flow extraction of organophosphorus pesticides coupled on-line with high-performance liquid chromatography

Cited by 15 publications

References 18 publications

Design of coaxial segmentors for liquid-liquid extraction/flow-injection analysis

Design of coaxial segmentors for liquid-liquid extraction/flow-injection analysis

On-Line Preconcentration and Gas Chromatographic Determination of N-Methylcarbamates and Their Degradation Products in Aqueous Samples

Electroanalytical determination of diazinon: Direct current and differential pulse polarography and adsorptive stripping voltammetry

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