Pesticide Residues in Agricultural Products (F. Y. 1994-1996)

Akiyama, Yumi; Yoshioka, Naoki; Yano, Miho; Mitsuhashi, Takao; Takeda, Nobuhiro; Tsuji, Masahiko; Matsushita, Sumio

doi:10.3358/shokueishi.38.5_381

Cited by 8 publications

(8 citation statements)

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“…3,4) PSA is effective to remove fatty acids which generate large interfering peaks during GC/MS analysis, 5) but it also retains pesticides containing acidic functions, such as carboxyl, phenol, sulfonyl, etc. So these pesticides were not included in our multi-residue analysis.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, liquid chromatography/ timeof-flight mass spectrometry (LC/TOF-MS) gives accurate mass information and enables the detection of an unlimited Multi-residue screening method of acidic pesticides in agricultural products by liquid chromatography/ time of flight mass spectrometry number of compounds with high selectivity in full-scan acquisition mode. 8) In this study, we investigated the use of intermediate extracted solutions before PSA clean-up of our multi-residue method for the analysis of acidic pesticides in agricultural products by LC/TOF-MS. Dispersive solid-phase extraction (D-SPE) with GCB is a simple and rapid clean-up procedure to adsorb the pigments, [7][8][9] especially chlorophyll, which could be removed by PSA clean-up 5) ; however, GCB also adsorbs pesticides with a planar structure. 10) We evaluated the effect of GCB clean-up on LC/TOF-MS analysis and the recovery of pesticides.…”

Section: Introductionmentioning

confidence: 99%

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Multi-residue screening method of acidic pesticides in agricultural products by liquid chromatography/time of flight mass spectrometry

2009

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A simple and rapid screening method of 95 acidic pesticides in agricultural products was developed. As acidic pesticides adsorb on the primary secondary amine mini-column with fatty acids which become interfering peaks during GC/MS analysis, they were not included in multi-residue analysis entailing PSA clean-up. In this study, the intermediate extracted solutions before PSA clean-up were analyzed by LC/TOF-MS. Accurate mass measurement of TOF-MS enabled the detection of molecular ions and fragment ions with high selectivity. Mean recoveries of 95 pesticides added to 6 agricultural products at 0.1 mg/g were 49-127% with RSD Ͻ20%. Limits of quantitation were 0.01-0.02 mg/g for 95 pesticides. The method was applied to 140 samples, and 2,4-D from lemon and orange, fluazifop from baby kidney bean, dichlorprop from apple were detected, respectively, at 0.02-0.03 mg/g below MRLs. The proposed method showed good sensitivity for 95 acidic pesticides and enabled rapid screening in combination with our multi-residue method targeted to 520 pesticides.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-residue screening method of acidic pesticides in agricultural products by liquid chromatography/time of flight mass spectrometry

2009

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“…Akiyama et al demonstrated that the gel permeation chromatography (GPC) and the primarysecondary amine (PSA) column were not good enough to remove cholesterol, fatty acid, and glycerin-mono-fatty acid (monoacylglycerols), while adding orisil or silica gel column was e ective. 4) In our other study, we demonstrated that monoacylglycerols were eluted together with pesticides from the PSA and the aminopropylsilanized silica gel (NH 2 ) column, but a orisil and a silica gel column removed them. 11) Sterols were also attributable components to the matrix effect.…”

Section: Experiments 3: Evaluation Of the Components Which Causingmentioning

confidence: 99%

“…Although we know what types of matrices are excluded during the sample preparations, few reports focus on the detailed behaviors of speci c matrix components. 4) In this report, we studied what matrix components remained in the sample solution for GC/MS and what components caused the matrix e ect.…”

Section: Introductionmentioning

confidence: 99%

Search of components causing matrix effects on GC/MS for pesticide analysis in food

et al. 2012

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A serious problem in analyzing pesticide residues in foods by gas chromatography/mass spectrometry (GC/MS) is the matrix enhancement e ect. e matrix e ect of pesticides in 5 types of representative samples preprocessed by the Positive List System was measured at 100 ppb. e mean matrix e ect value of pesticides in potato, spinach, orange, brown rice, and soybean sample was 129%, 191%, 171%, 225%, and 146%, respectively. Continuing research showed that the sample solutions contained high amounts of some matrix components, such as tocopherols, sterols, and monoacylglycerols. In order to investigate which component causes the matrix e ect, each matrix solution was prepared at 1-1000 ppm (monoacylglycerols: 1-500 ppm), and the pesticide mixture was forti ed to 100 ppb. e matrix e ect depended on the concentration of the matrix solution, and we concluded that monoacylglycerols were the most attributable components to the matrix e ect.

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“…[1][2][3] Regulatory agencies involved in the monitoring of pesticide residues in foods require fast and efficient multiresidue methods with a broad scope of application in order to maximize the coverage of their monitoring activities. Modern residue monitoring programs are expected to be responsive to the latest developments in agriculture and new legislation.…”

Section: Introductionmentioning

confidence: 99%

Rapid Method for the Determination of 180 Pesticide Residues in Foods by Gas Chromatography/Mass Spectrometry and Flame Photometric Detection

et al. 2005

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A method was established for the determination of 180 pesticide residues in fruits and vegetables. The procedure involved extraction with acetonitrile, followed by a salting-out step with anhydrous MgSO 4 and NaCl. Removal of sediment and water was performed simultaneously by centrifugation. Co-extractives were removed with a double-layered SPE column, and graphitized carbon black and primary secondary amine (GCB/PSA) solid phase extraction cleanup cartridge. The eluate was determined by GC/FPD and GC/MS without further cleanup. Recovery data were obtained by fortifying 9 matrices at 0.05-0.1 mg/g. Recoveries of 180 pesticides were mainly 70-110% and the relative standard deviation (RSD) was below 25%. Limits of detection ranged between 0.01 and 0.05 mg/g for tested pesticides.

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Pesticide Residues in Agricultural Products (F. Y. 1994-1996)

Cited by 8 publications

References 0 publications

Multi-residue screening method of acidic pesticides in agricultural products by liquid chromatography/time of flight mass spectrometry

Multi-residue screening method of acidic pesticides in agricultural products by liquid chromatography/time of flight mass spectrometry

Search of components causing matrix effects on GC/MS for pesticide analysis in food

Rapid Method for the Determination of 180 Pesticide Residues in Foods by Gas Chromatography/Mass Spectrometry and Flame Photometric Detection

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