Determination of methyl carbamate residues using on-line coupling of HPLC with a post column fluorimetric labeling technique

Blass, W.

doi:10.1007/bf00322345

Cited by 18 publications

(1 citation statement)

References 4 publications

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“…19 Other chromatographic techniques frequently used for the determination of JV-methylcarbamates include TLC20 and HPLC. 21 Flow injection analysis (FIA) has been employed for the determination of carbaryl,22 carbofuran and malaoxon,23 and carbofuran, propoxur, and carbaryl,24 which were monitored with a conventional or diode array24 spectrophotometer. One method using continuous flow extraction for the determination of organophosphorus pesticides by HPLC with UV detection26 and MS characterization28 was reported by Farran et al Bruchet et al27 reported a method for continuous extraction and determination of different pesticides (between 10 and 100 ng/L) by GC-MS using a moving needle injection technique that allowed for injection volumes of up to 50 µ .…”

Section: Introductionmentioning

confidence: 99%

Automatic gas chromatographic determination of N-methylcarbamates in milk with electron capture detection

Ballesteros¹,

Gallego²,

Valcárcel³

1993

Anal. Chem.

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A new analytical method that combines on-line derivatization-extraction and gas-liquid chromatography for the determination of N-methylcarbamates is reported. The hydrolysis products of N-methylcarbamates (phenols) are derivatized and extracted in a continuous fashion using pentafluoropropionic anhydride (derivatizing reagent) in n-hexane as an extractant. The thermal instability of N-methylcarbamates is overcome by forming fluoro derivatives that can be identified and quantified at the nanogram per milliliter level with an ECD detector. Application of the proposed method to six mixtures of N-methylcarbamates yielded detection limits between 2 and 20 ng/mL and a relative standard deviation of 2.35-3.70%. Average recoveries of N-methylcarbamates added to cow's milk at concentrations between 50 ng/mL and 2 micrograms/mL ranged from 93.7 to 100.8%.

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Section: Introductionmentioning

confidence: 99%

Automatic gas chromatographic determination of N-methylcarbamates in milk with electron capture detection

Ballesteros¹,

Gallego²,

Valcárcel³

1993

Anal. Chem.

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The Spanish Pesticide Residue Monitoring Programme: Design and Results

Coscolla

Gamón

1997

Pestic. Sci.

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Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product

et al. 1997

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A differential pulse voltammetric method for the determination of fenobucarb is proposed. This N-methylcarbamate pesticide is hydrolyzed in alkaline medium (0.02 M NaOH during ten min), and the resulting product 2-sec-butylphenol is oxidized at the glassy carbon electrode giving rise to a peak at a potential near 750 mV (pH 3.5). The linear relationship between Ip and fenobucarb concentration was established up to 1 . 0 0~ M concentration, the detection limit was 3.68 x M concentration (n = 11, p = 0.05). The method has been satisfactorily applied to the analysis of water samples spiked with the pesticide.

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Determination of methyl carbamate residues using on-line coupling of HPLC with a post column fluorimetric labeling technique

Cited by 18 publications

References 4 publications

Automatic gas chromatographic determination of N-methylcarbamates in milk with electron capture detection

Automatic gas chromatographic determination of N-methylcarbamates in milk with electron capture detection

The Spanish Pesticide Residue Monitoring Programme: Design and Results

Differential pulse voltammetric determination of fenobucarb at the glassy carbon electrode, after its alkaline hydrolysis to a phenolic product

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