A highly sensitive method for simultaneous determination of the quaternary ammonium pesticides chlormequat and mepiquat in pears and potatoes by modified QuEChERS-high performance liquid chromatography-tandem mass spectrometry

Gao, Jieying; Wang, Jian; Zuo, Mingzhang; Ma, Li; Cui, Yue; Yang, Ting; Ding, Min

doi:10.1039/c4ra10698a

Cited by 11 publications

(1 citation statement)

References 25 publications

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“…In previous studies, methanol, 9,24,27,28 acetonitrile, 23,29 and acetone 12 were usually used to extract chlormequat and fosetyl-aluminium. However, methanol is more toxic, and can pass through the digestive tract, respiratory tract, and skin to pose a threat to human health.…”

Section: Resultsmentioning

confidence: 99%

The determination of underivatized chlormequat, fosetyl-aluminium and phosphonic acid residues in maize and soybean by LC-MS/MS

Yang,

Geng,

Lin

et al. 2024

Anal. Methods

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Section: Resultsmentioning

confidence: 99%

The determination of underivatized chlormequat, fosetyl-aluminium and phosphonic acid residues in maize and soybean by LC-MS/MS

Yang,

Geng,

Lin

et al. 2024

Anal. Methods

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Pesticides (New Generation) and Related Compounds, Analysis of

Ccanccapa

Picó

2017

Encyclopedia of Analytical Chemistry

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This article presents an overview of analytical methods for the analysis of pesticide (new‐generation) and related compounds in the last 5 years, which updates the previous one. Pesticides included in this group display almost no change, but the evolution of analytical techniques is important. In general, new pesticides are now included in multiresidue methods with generic sample treatment methodologies being able to extract as many pesticide classes as possible. However, this article focuses not only on these common multiresidue methods but also on specific methodologies as single‐residue methods for the analysis of new‐generation pesticides. The most widely used detection technique for the determination of pesticides is mass spectrometry (MS) combined with gas chromatography (GC) and/or liquid chromatography (LC). However, the advances in immunoassays, biosensors and other techniques are also included. Finally, the future perspectives and the trends for pesticide residue analysis in food and environmental matrices are outlined.

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Study of different HILIC, mixed-mode, and other aqueous normal-phase approaches for the liquid chromatography/mass spectrometry-based determination of challenging polar pesticides

et al. 2016

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The aim of the study was to evaluate the performance of different chromatographic approaches for the liquid chromatography/mass spectrometry (LC-MS(/MS)) determination of 24 highly polar pesticides. The studied compounds, which are in most cases unsuitable for conventional LC-MS(/MS) multiresidue methods were tested with nine different chromatographic conditions, including two different hydrophilic interaction liquid chromatography (HILIC) columns, two zwitterionic-type mixed-mode columns, three normal-phase columns operated in HILIC-mode (bare silica and two silica-based chemically bonded columns (cyano and amino)), and two standard reversed-phase C18 columns. Different sets of chromatographic parameters in positive (for 17 analytes) and negative ionization modes (for nine analytes) were examined. In order to compare the different approaches, a semi-quantitative classification was proposed, calculated as the percentage of an empirical performance value, which consisted of three main features: (i) capacity factor (k) to characterize analyte separation from the void, (ii) relative response factor, and (iii) peak shape based on analytes' peak width. While no single method was able to provide appropriate detection of all the 24 studied species in a single run, the best suited approach for the compounds ionized in positive mode was based on a UHPLC HILIC column with 1.8 μm particle size, providing appropriate results for 22 out of the 24 species tested. In contrast, the detection of glyphosate and aminomethylphosphonic acid could only be achieved with a zwitterionic-type mixed-mode column, which proved to be suitable only for the pesticides detected in negative ion mode. Finally, the selected approach (UHPLC HILIC) was found to be useful for the determination of multiple pesticides in oranges using HILIC-ESI-MS/MS, with limits of quantitation in the low microgram per kilogram in most cases. Graphical Abstract HILIC improves separation of multiclass polar pesticides.

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A highly sensitive method for simultaneous determination of the quaternary ammonium pesticides chlormequat and mepiquat in pears and potatoes by modified QuEChERS-high performance liquid chromatography-tandem mass spectrometry

Cited by 11 publications

References 25 publications

The determination of underivatized chlormequat, fosetyl-aluminium and phosphonic acid residues in maize and soybean by LC-MS/MS

The determination of underivatized chlormequat, fosetyl-aluminium and phosphonic acid residues in maize and soybean by LC-MS/MS

Pesticides (New Generation) and Related Compounds, Analysis of

Study of different HILIC, mixed-mode, and other aqueous normal-phase approaches for the liquid chromatography/mass spectrometry-based determination of challenging polar pesticides

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