Determination of Nine Organophosphorus Pesticides in Cereals and Kidney Beans by Capillary Gas Chromatography with Flame Photometric Detection

Tang, Bo; Zhang, Jine; Zang, Liguo; Zhang, Yaozhong; Li, Xiangyang; Zhou, Li

doi:10.1093/chromsci/43.7.337

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…In the study of Hirara et al after multiple extractions of the sample with ACN and ethyl acetate, the lipid fraction was removed by addition of the mixture of ACN saturated with n-hexane and n-hexane saturated with ACN [17]. In a study conducted by Tang et al DCM was used for purification after acetone-water extraction of cereals and kidney beans prior to GC-NPD determination of nine OPPs [13].…”

Section: Methods Optimizationmentioning

confidence: 99%

“…(12) parathion, (13) bromophos -methyl, (14) chlorfenvinphos, (15) bromofos -ethyl, (16) fenamiphos, (17) ethion, (18) phosmet, (19) phosalone, (20) azinphos -methyl.…”

Section: Sample Preparationmentioning

confidence: 99%

“…A lot of different extraction and cleanup methods including multiple solvent extractions, supercritical fluid extraction (SFE), accelerated solvent extraction (ASE), gel permeation chromatography (GPC), solid phase extraction (SPE) were used in the determination of pesticides in cereals but there is no universal technique, which would be entirely better than the others in terms of all analytical scopes [13][14][15][16][17][18][19][20]. Many of the traditional procedures used to perform the extractions for these analyses are time consuming and solvent intensive [13,17].…”

Section: Introductionmentioning

confidence: 99%

“…Organophosphorus pesticides are usually determined by gas chromatography (GC) with flame photometric detection (FPD) [13,18], nitrogen-phosphorus detection (NPD) [14,15,21], mass spectrometry detection (MS) [16,17,[21][22][23][24][25], and liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection

Kostik¹,

Gjorgeska

Angelovska

2014

AJAC

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Abstract:The method for simultaneous determination of 20 organophosphorus pesticide residues in corn samples has been developed and validated. For the extraction of organophosporus pesticide residues from the samples, the accelerated solvent technique with the mixture of dichloromethane: acetone (1:1, V/V) was used. Clean up was done using liquid -liquid extraction with n -hexane, followed by solid phase extraction on primary secondary amine adsorbent, and elution with the mixture of acetone: toluene (65:35). The determination of the pesticides was carried out by gas chromatography with nitrogen phosphorus detection. Separation and quantitative determination of the analytes were performed on a fused silica capillary ZB-35 column (30 m x 0.25 mm i.d. x 0.25 µm, Phenomenex). The recovery was investigated in blank corn samples fortified with mevinphos, diazinon, dimethoate, bromofos-methyl, chlorfenvinphos, fenamiphos, ethion and phosalone at 5 ng/g, 10 ng/g, 15 ng/g , 20 ng/g and 25 ng/g, respectively and with methacrifos, phorate, etrimfos, parathion-methyl, pirimiphosmethyl, fenitrothion, chlorpyrifos, malathion, parathion, bromofos-ethyl, phosmet and azinphos-methyl at 10 ng/g, 20 ng/g, 30 ng/g, 40 ng/g and 50 ng/g, respectively. The recovery ranged from 76.0% to 112.0%. Repeatability expressed as relative standard deviation (RSD) was less than 8.2%. Linearity expressed as correlation coefficient (R 2 ) ranged from 0.9935 to 0.9996. Measurement uncertainty (U x ) was lower than 14.2% for all tested pesticides. The limits of quantification (LOQ) were bellow 5 ng/g for all tested pesticides. The satisfactory Z-score results of international proficiency tests confirm good analytical performances of the developed method.

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Section: Methods Optimizationmentioning

confidence: 99%

“…(12) parathion, (13) bromophos -methyl, (14) chlorfenvinphos, (15) bromofos -ethyl, (16) fenamiphos, (17) ethion, (18) phosmet, (19) phosalone, (20) azinphos -methyl.…”

Section: Sample Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection

Kostik¹,

Gjorgeska

Angelovska

2014

AJAC

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“…1) are examples of recent misused insecticides. There is scarce literature available concerning the development of analytical methodology for the analysis of these key compounds in pepper 7–9. Therefore, there is a need to develop and describe in detail such methods.…”

mentioning

confidence: 99%

Determination of selected non‐authorized insecticides in peppers by liquid chromatography time‐of‐flight mass spectrometry and tandem mass spectrometry

Mezcúa

Ferrer

García-Reyes

et al. 2008

Rapid Comm Mass Spectrometry

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In this work, two analytical methods based on liquid chromatography coupled to electrospray time-of-flight mass spectrometry (LC/ESI-TOFMS) and tandem mass spectrometry (LC/ESI-MS/MS) are described for the identification, confirmation and quantitation of three insecticides non-authorized in the European Union (nitenpyram, isocarbophos and isofenphos-methyl) but detected in recent monitoring programmes in pepper samples. The proposed methodologies involved a sample extraction procedure using liquid-liquid partition with acetonitrile followed by a cleanup step based on dispersive solid-phase extraction. Recovery studies performed on peppers spiked at different fortification levels (10 and 50 microg kg(-1)) yielded average recoveries in the range 76-100% with relative standard deviation (RSD) (%) values below 10%. Identification, confirmation and quantitation were carried out by LC/TOFMS and LC/MS/MS using a hybrid triple quadrupole linear ion trap (QqLIT) instrument in multiple-reaction monitoring (MRM) mode. The obtained limits of quantitation (LOQs) were in the range 0.1-5 microg kg(-1), depending on each individual technique. Finally, the proposed methods were successfully applied to the analysis of suspected pepper samples.

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Determination of Organophosphorus Pesticides Based on BDD Electrode Modified with Au/chitosan Fiber

Jin

Liu

Wei

2012

J Chinese Chemical Soc

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The Au/chitosan fiber was firstly prepared by electrospinning and chemical reduction method and used to modify BDD electrode for the detection of methyl parathion. The results indicated that Au/chitosan fibermodified BDD electrode could improve the electrocatalytic activity, accelerate response, enhance the sensitivity, and reduce the detection limit, as compared with the bare BDD electrode. The repeatability and stability of Au/chitosan fiber-modified BDD electrode was also studied. For the detection of methyl parathion in the apple juice samples, Au/chitosan fiber-modified BDD electrode obtained favorable results and ideal recovery rate. EXPERIMENTAL Chemicals and ApparatusMethyl parathion was obtained from Chengdu Bestreagent Co., Ltd., China. All other chemicals were analytical reagent grade. The supporting electrolyte was phosphate buffer solution (PBS, pH 5.9) prepared with Na 2 HPO 4 and KH 2 PO 4 . Electrochemical measurements were per-

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Determination of Nine Organophosphorus Pesticides in Cereals and Kidney Beans by Capillary Gas Chromatography with Flame Photometric Detection

Cited by 12 publications

References 15 publications

Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection

Development and Validation of a Method for the Simultaneous Determination of 20 Organophosphorus Pesticide Residues in Corn by Accelerated Solvent Extraction and Gas Chromatography with Nitrogen Phosphorus Detection

Determination of selected non‐authorized insecticides in peppers by liquid chromatography time‐of‐flight mass spectrometry and tandem mass spectrometry

Determination of Organophosphorus Pesticides Based on BDD Electrode Modified with Au/chitosan Fiber

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