Determination of Pesticide Residues in Rice Grain by Solvent Extraction, Column Cleanup, and Gas Chromatography-Electron Capture Detection

Uddin, Riaz; Iqbal, Sajid; Khan, Muhammad Farhanullah; Parveen, Zahida; Ahmed, Muhammad Farooq; Abbas, Muhammad

doi:10.1007/s00128-010-0178-7

Cited by 23 publications

(7 citation statements)

References 9 publications

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“…In the present study, extraction and cleanup steps were performed according to Uddin et al 2011, with some modifications in the cleanup step. Dry mixture of acidic alumina and activated charcoal was introduced into glass column with the help of aluminum foil instead of slurry of that mixture in dichloromethane to reduce the amount of DCM used in the cleanup step.…”

Section: Resultsmentioning

confidence: 99%

“…The spiked samples were kept for 24 h before extraction, for allowing time for insecticide penetration into the samples. The extraction and cleanup were undertaken as method described by Uddin et al (2011). For this, 4 g of ground wheat was placed in 50 mL centrifuging tube and shaken vigorously after addition of 40 mL mixture of acetone:methanol (1:1).…”

Section: Methodsmentioning

confidence: 99%

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Extraction, Cleanup, and Chromatographic Determination of Imidacloprid Residues in Wheat

Iqbal

Uddin

Saied

et al. 2012

Bull Environ Contam Toxicol

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This study presents an improved method for quantitative analysis of imidacloprid residues in wheat grain using high performance liquid chromatography. The study used chromatographic response (in terms of peak height) as a quantitative tool for determination instead of peak area. The peak height of imidacloprid showed a very good linear correlation (R(2) = 0.999) when compared with absolute values at six different concentrations. The limit of detection was found to be 0.01 μg/mL. The recovery of imidacloprid residues in spiked wheat grain at three levels (0.03, 0.05, and 0.1 μg/g) was in the range of 79%-88% with %RSD 5.72 at 0.05 μg/g (w/w) and between 87% and 93% with %RSD 3.55 at 0.1 μg/g (w/w). At 0.03 μg/g (w/w) level, recovery was not within the recommended range of 70%-110%. Therefore, the lowest limit of quantification for this method was found to be 0.05 μg/g.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Extraction, Cleanup, and Chromatographic Determination of Imidacloprid Residues in Wheat

Iqbal

Uddin

Saied

et al. 2012

Bull Environ Contam Toxicol

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“…To minimize the problem, protective insecticides are misused, which arises concern about the quality of the products that reach consumers' table (Prestes et al 2009). Consumers have increasingly demanded foods without pesticides residue (Dórea and Sobrinho 2004;Uddin et al 2011 oxidation, photochemical degradation and chemical oxidation have been studied to optimize pesticide residue degradation (Chiron et al 2000;Selma et al 2008). Recent studies have shown ozone gas efficiency in the removal of pesticide residues (Wu et al 2007) and mycotoxins in plant products (Inan et al 2007;Alencar et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Ozone as degradation agent of pesticide residues in stored rice grains

et al. 2017

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This work aimed to study the kinetics of bifenthrin and deltamethrin residues degradation in rice grains under exposure to ozone and evaluate the effect of ozonization on rice grains marketing standards. The grains sprayed with pesticides were exposed to ozone at a concentration of 3 mg L and continuous flow of 1.0 L min for defined periods of up to 10 h. Residues of pesticides were extracted from grains using solid liquid extraction method with low-temperature partition analyzed by gas chromatography with electron capture detection (SLE/LTP-GC/ECD). Data from residual concentrations of bifenthrin and deltamethrin, due to the ozone exposure period, were adjusted to kinetic models of zero order, first order and second order. It was observed that ozone was effective in the degradation bifenthrin and deltamethrin residues, removing 91.9% of bifenthrin and 92.7% of deltamethrin. The kinetic model that best fitted deltamethrin and bifenthrin residues degradation data by ozone, was the one of first order. The marketing standards evaluated were the water content and yield. It was observed the ozone did not alter the rice grains water content and yield.

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“…Recoveries of 80-120% were attained for most analytes, and the LOQs ranged from 10-50 ng/g. Solvent extraction to analyze for multiple pesticide residues in rice grains was reported by Uddin et al (2011). The recoveries were checked at 0.1 and 0.5 µg/g, and the average recoveries were 74%-111%.…”

confidence: 99%

Analytical Methods for Pesticide Residues

Liang

Bilon

Hay

2012

Water Environment Research

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A review of literature published in 2011 on analytical methods for pesticides are presented here in six sections: extraction methods, chromatographic or mass spectrometric techniques, spectrophotometric techniques, fluorescence methods, biochemical assays and immunoassays, and review articles. Because many of the research studies in the cited publications utilized more than one analytical method, the different sections should not be thought of as being mutually exclusive. Extraction Techniques Successful extraction techniques are crucial in many applications to enable the proper analyses of pesticides. The extraction techniques can be broadly classified as solid-or liquid-phase extraction or dispersion, with much overlap and other sub-categories. One common extraction technique used for analyzing pesticide residues is QuEChERS. Caldas, Bolzan, et al. (2011) developed a new method for the determination of clomazone, fipronil, tebuconazole, propiconazole, and azoxystrobin in samples of rice paddy soil, where pesticides from soil samples were extracted using a modified QuEChERS method using acidified acetonitrile followed by the addition of MgSO 4 and NaCl prior to the final determination by LC atmospheric chemical pressure ionization tandem MS. Recoveries of the spiked samples ranged between 70.3 and 120%, and the limits of quantification were between 10 and 50 µg/kg. Georgakopoulos et al. (2011) tested three lowfat baby food matrices that were fortified with 0.01-0.2 mg/kg of phorate, diazinon, chlorpyrifos and methidathion using a QuEChERS-like method and varying quantities of octadecyl (C(18)) sorbent. In meals containing vegetables (1.9% fat) and lamb (3.0% fat), 180-210 mg C(18) gave recoveries from 67.0% to 105.0% , and yogurt (4.5% fat) required 200-230 mg C(18) for similar recoveries. The QuEChERS method of sample preparation was used to analyze for buprofezin, carbofuran, endosulfan-alpha, endosulfan-beta, endosulfan sulfate, and monocrotophos in thirty-three tomato samples (Andrade et al., 2011). Samples were extracted with acetonitrile, followed by liquid-liquid partition with addition of MgSO 4 and NaCl then dSPE using primary secondary amine sorbent, resulting in recoveries ranging from 71 to 111%. Park, Choi, et al. (2011) developed a multiresidue method using QuEChERS extraction to analyze for 41 pesticide residues in cooked potatoes, radishes, and rice. The recoveries ranged between 68.6 and 130.0% for the majority of the tested pesticides, and the LODs and LOQs ranged between 0.004 and 0.3µg/kg and 0.0125 and 1.0 µg/kg, respectively. Xu, Wu, et al. (2011) validated the use of QuEChERS for the extraction of 15 organochlorine pesticides in completely different matrices of traditional

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Determination of Pesticide Residues in Rice Grain by Solvent Extraction, Column Cleanup, and Gas Chromatography-Electron Capture Detection

Cited by 23 publications

References 9 publications

Extraction, Cleanup, and Chromatographic Determination of Imidacloprid Residues in Wheat

Extraction, Cleanup, and Chromatographic Determination of Imidacloprid Residues in Wheat

Ozone as degradation agent of pesticide residues in stored rice grains

Analytical Methods for Pesticide Residues

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