Effects of water-soaking on the extraction of pesticide residue from powdered brown rice and wheat samples

Saka, Machiko; Iijima, Kazuaki; Koma, Yukiko; Fujita, Masahiro; Odanaka, Yoshitsugu; Kato, Yasuhiro

doi:10.1584/jpestics.31.431

Cited by 10 publications

(7 citation statements)

References 1 publication

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“…On the other hand, the significant difference was not observed for etofenprox and fenitrothion between water-soaking and without water-soaking. These results were also similar to Saka et al, [22] that is to say, water-soaking was more effective for the extraction of pesticides that have a lower logP (octanol-water partition coefficient) value (Fig. 1).…”

Section: The Results Of Homogenization and The Effect Of Water-soakinsupporting

confidence: 90%

“…As presented by Saka et al, [22] watersoaking was effective for the extraction also in our study. From Figure 2, there was a significant difference between the concentrations with water-soaking and without watersoaking for fthalide and isoprothiolane (t-test: p<0.05).…”

Section: The Results Of Homogenization and The Effect Of Water-soakinsupporting

confidence: 86%

“…Further, we also tested the influence of water-soaking to the extraction efficiency. Although this influence was studied by Saka et al, [22] it was necessary to test since the extraction behavior may vary by the kind of pesticides.…”

Section: The Results Of Homogenization and The Effect Of Water-soakinmentioning

confidence: 99%

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Evaluation of pressurized liquid extraction for the analysis of four pesticides in unpolished rice

Otake

Aoyagi

Matsuo

et al. 2008

Journal of Environmental Science and Health, Part B

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The aim of to evaluate efficiency of this study was extraction pressurized liquid extraction (PLE) for the analysis of four pesticides, fthalide, etofenprox, fenitrothion, and isoprothiolane, in unpolished rice by comparing with homogenization as a reference technique. The concentrations of four selected pesticides obtained by PLE with acetonitrile at 130 degrees C for 10 min x 2 cycles were comparable to those by homogenization with water-soaking. The repeatability of the analysis, represented as relative standard deviations (RSDs), were 1.4-3.6% (n = 3) for PLE at 130 degrees C and 1.2-3.8% (n = 3) for homogenization with water-soaking. Recovery yields of surrogates were 75-88% and 87-109% for PLE at 130 degrees C and homogenization with water-soaking, respectively, and these were satisfactory according to the method of positive list. This study suggested that PLE can be applied for the analysis of selected four pesticides in unpolished rice as well as homogenization with water-soaking.

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Section: The Results Of Homogenization and The Effect Of Water-soakinsupporting

confidence: 90%

Section: The Results Of Homogenization and The Effect Of Water-soakinsupporting

confidence: 86%

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Evaluation of pressurized liquid extraction for the analysis of four pesticides in unpolished rice

Otake

Aoyagi

Matsuo

et al. 2008

Journal of Environmental Science and Health, Part B

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“…For dry samples, such as brown rice, it is reportedly requred to inject water into samples before organic solvent extraction to cause the tissues to swell. 12,13) On the other hand, in this method, although a water injection was not used, good recovery was obtained by using a water-mixed solvent even in the extraction from brown rice. In our experiments without a water injection, the extraction efficiency of real residue from dry samples is quantitatively uncertain.…”

Section: Analysis Of Agricultural Productsmentioning

confidence: 97%

Determination of nitenpyram and its metabolites in agricultural products by using hydrophilic interaction liquid chromatography-tandem mass spectrometry

Yoshida

Murakawa²,

Toda

2013

J. Pestic. Sci.

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A simple and rapid method for the measurement of a neonicotinoid pesticide, nitenpyram, and its metabolites, CPMA and CPMF, was investigated. The three compounds were determined individually and simultaneously by simple ultrasonic extraction followed by hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS). Good chromatograms were obtained using a non-modified silica gel column. The calibration curves were straight (R 2 >0.999) for each compound; they were 0.002-2 mg/kg for 5 g of agricultural product sample with limits of detection (S/N=3) of 0.24-0.36 µg/kg (nitenpyram), 0.12-0.19 µg/kg (CPMA), and 0.13-0.18 µg/kg (CPMF). Good recoveries were obtained for sweet pepper, mandarin orange, onion, and brown rice (93.0-106.6% in recovery). For contaminated samples, data by the presented method agreed well with nitenpyram data by HPLC-UV and the total of CPMA and CPMF by derivatization followed by gas chromatography-flame thermionic detection.

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“…3.1. Extraction efficiencies of pesticide residue analysis in rice and wheat samples 14) The effects of water-soaking pretreatment of powdered dry cereal using brown rice and wheat samples on extraction efficiency were examined. The recovery of four pesticide residues (carbaryl, malathion, diazinon, and fenitrothion) detected in brown Residue concentration in a product (mg/kg)/residue concentration in raw sesame (mg/kg).…”

Section: Considerations For Extraction In Pesticide Residue Analysismentioning

confidence: 99%

Development and diffusion of practical technologies for pesticide residue analysis

Saka

2018

J. Pestic. Sci.

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We often encounter difficulties in analyzing pesticide residues in food, since the residue level to be measured is infinitesimal but the food samples may contain a variety of matrices, including interferences, for chromatographic analysis. Thus it is important to find out the key points to be checked in the extraction, purification, and determination steps of analysis. We have attempted to develop practical technologies for the analysis of pesticide residues in raw agricultural commodities based on the following studies: The effect of processing and cooking on pesticide residue levels in several crop samples (rice, wheat, soybean, and sesame) was investigated. The processing factor is useful to estimate the amount of exposure to each pesticide residue for risk assessment and is helpful in setting the maximum residue limits of processed foods. In addition, residue levels in the peel and pulp of watermelon, melon, and kiwi fruit samples were examined to confirm the differences in the distribution of residues. As a basic study, the effect of watersoaking pretreatment of powdered dry cereal on extraction efficiency was examined, and an optimal time for water-soaking was found. A recent study examined the ability of several new types of solid-phase extraction columns to remove matrices in brown rice samples and verified the effective purification method for each sample.

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Effects of water-soaking on the extraction of pesticide residue from powdered brown rice and wheat samples

Cited by 10 publications

References 1 publication

Evaluation of pressurized liquid extraction for the analysis of four pesticides in unpolished rice

Evaluation of pressurized liquid extraction for the analysis of four pesticides in unpolished rice

Determination of nitenpyram and its metabolites in agricultural products by using hydrophilic interaction liquid chromatography-tandem mass spectrometry

Development and diffusion of practical technologies for pesticide residue analysis

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