GC/MS (SIM) Determination of 14 Pesticides Including Cyhexatin and 2, 4, 5-T in Nuts

Kawasaki, M.; Fukuhara, Katsuharu; Katsumura, Rieko; Takasaka, Noriko; Uchiyama, Sadao

doi:10.3358/shokueishi.38.3_161

Cited by 2 publications

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“…However, only organic species are generally analyzed in multiclass, MRMs for pesticides, and the inorganic pesticides are typically analyzed in foods and the environment separately using elemental detection methods. A few approaches, such as atomic emission detection (AED) after GC, may be able to analyze organometallic species in the same procedure as other classes of pesticides, 19 but it is more common to have separate methods for organometallics. Table 3 presents major classes of herbicides, their solubility range in water, common examples of individual herbicides within each class, and their basic chemical structures.…”

Section: Pesticidesmentioning

confidence: 99%

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Lehotay¹

2000

Encyclopedia of Analytical Chemistry

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Strategies for multiclass, multiresidue analysis of pesticides depend on several factors that all derive from three fundamental considerations: (1) the need for the results; (2) the form and composition of the matrix; and (3) the time, resources, and technology available to the analyst. First, the need for the data dictates the quality assurance (QA)/quality control (QC) guidelines and the desired analytical figures of merit, such as limits of detection (LOD) and the accuracy and precision of the results. These needs also contribute to the choice of pesticide analytes, which sets the polarity range for the analysis. No single method can determine all pesticides in diverse matrices, so an overall strategy is often used to compartmentalize a series of approaches in order best to detect the targeted pesticides in an effective and efficient process. Second, the various types of matrices that are commonly analyzed for pesticide residues may affect the sample preparation approach employed in the analytical strategy. Common matrices for pesticide analysis consist of solids, liquids, and gases in applications associated with food, agricultural, environmental, and other sample types. Varying degrees of pesticide–matrix interactions in different materials require more or less stringent extraction procedures to separate the pesticides from the sample. Sample preparation in multiclass, multiresidue strategies frequently utilizes liquid–solid, liquid–liquid and other partitioning processes including those, such as pressurized fluid extraction (PFE), in which pressure and temperature of different fluids are controlled. Extracts often require cleanup to remove interfering co‐extracted matrix components prior to analysis. A variety of cleanup techniques based on a number of partitioning processes, such as liquid chromatography (LC), may be employed in an on‐line or off‐line fashion. Lastly, the sample extract is usually further separated and analyzed using one or more techniques. The majority of pesticides are analyzed by gas chromatography (GC) with mass spectrometry (MS) and/or element‐selective GC detectors. High‐performance liquid chromatography (HPLC) is often used in the analysis of thermally labile pesticides that are not amenable to GC analysis. Other alternatives for analysis of certain pesticide include capillary electrophoresis (CE) and immunoassays. Fundamentally, a high degree of selectivity helps in generating excellent analytical results, but the wide polarity range of analytes in multiclass, multiresidue methods (MRMs) for pesticides necessitates a great deal of effort to attain a high degree of selectivity. Trade‐offs and compromises are omnipresent in multiclass, multiresidue analysis of pesticides, and a host of strategies are available depending on how the analytical chemist prioritizes the analytical and practical considerations.

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Section: Pesticidesmentioning

confidence: 99%

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Lehotay¹

2000

Encyclopedia of Analytical Chemistry

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“…Several GC/MS methods for newly introduced pesticides have been reported recently1)-4). Multiresidue analyses of pesticides using the GC/MS (SIM) technique were reported in our previous papers5), 6). N-Methylcarbamate pesticides are determined by an HPLC method using post column-fluorescent labeling with o-phthalaldehyde (OPA)7) according to the Japanese Food Sanitation Law.…”

Section: Introductionmentioning

confidence: 99%

Study on GC/MS (SIM) for Determination of Carbamate and Organonitrogen Pesticides in Foods with Simple Clean-up by SPE Method

Kawasaki

Inoue

Fukuhara

et al. 1999

J. Food Hyg. Soc. Jpn

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Studies to develop a GC/MS (SIM) method for the determination of 34 pesticides including carbamates and organonitrogen pesticides in foods with solid-phase extraction (SPE) were conducted. Three kinds of SPE columns, a porous diatomaceous earth cartridge column, a diatomite column with a mini C18 cartridge column and a Florisil cartridge column were used successively to clean-up the extract from foods as an alternative to a separatory funnel for liquid-liquid partition. The handling was simpler than the conventional method and gave high recoveries of the pesticides. In GC/MS (SIM), 2 to 4 different fragment ions were selected for each pesticide so that the GC/MS (SIM) identification could be done more accurately for multi-residue analysis of carbamate and organonitrogen pesticides. This simpler method was applicable for 29 pesticides out of 34 with almost the same recoveries and detection limits as the conventional method.

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GC/MS (SIM) Determination of 14 Pesticides Including Cyhexatin and 2, 4, 5-T in Nuts

Cited by 2 publications

References 0 publications

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Multiclass, Multiresidue Analysis of Pesticides, Strategies for

Study on GC/MS (SIM) for Determination of Carbamate and Organonitrogen Pesticides in Foods with Simple Clean-up by SPE Method

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