Application and enantiomeric residue determination of diniconazole in tea and grape and apple by supercritical fluid chromatography coupled with quadrupole-time-of-flight mass spectrometry

Zhang, Xinzhong; Zhao, Yuqing; Cui, Xinyi; Wang, Xinru; Shen, Huishan; Chen, Zongmao; Huang, Ching Jer; Meruva, Narendra K.; Zhou, Li; Wang, Fang; Wu, Luchao; Luo, Fengjian

doi:10.1016/j.chroma.2018.10.051

Cited by 20 publications

(21 citation statements)

References 44 publications

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“…Nearly 30% of the agrochemicals used worldwide are chiral compounds, and most of them are sold and used as racemates [1,2]. It is therefore inevitable that pesticide residues will be found in vegetables and tea, and this poses potential safety risks [3‐5]. According to our statistics, approximately two‐thirds of the active ingredients found in pesticides registered for use on tea plants are chiral compounds [6].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, oxathiapiprolin has one asymmetric carbon center and consists of two enantiomers, as shown in Figure 1; at present, it is not clear which enantiomer is the active one. Although, there have been many reports on the analysis of chiral pesticide residues [4,5,33–37], there have been no reports on the differences between enantiomers during residual analysis or studies of dissipation behavior, or on the enantioselective analysis for oxathiapiprolin residues in different samples. Thus, it is critical to consider the behaviors carefully and to establish a method for residue analysis of oxathiapiprolin enantiomers.…”

Section: Introductionmentioning

confidence: 99%

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Enantioselective residue analysis of oxathiapiprolin and its metabolite in tea and other crops by ultra‐high performance liquid chromatography–tandem mass spectrometry

Zhang

Sun

Wang

et al. 2020

J of Separation Science

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Oxathiapiprolin is the first chiral piperidinyl thiazole isoxazoline fungicide developed to control downy mildew and other diseases, and there were no prior reports on its enantiomeric residue. In this study, a modified quick, easy, cheap, effective, rugged, and safe extraction and purification method followed by ultrahigh performance liquid chromatography-tandem mass spectrometry determination was first developed and validated for the residue analysis of oxathiapiprolin enantiomers and its metabolite IN-E8S72 in green tea and other crops. Oxathiapiprolin enantiomers and IN-E8S72 were separated on a chiral Lux Cellulose-3 column with the use of 0.1% formic acid in acetonitrile and 5 mmol/L ammonium acetate in water as mobile phases. IN-E8S72 was eluted first, followed by (−)oxathiapiprolin, and then (+)-oxathiapiprolin. The recoveries ranged from 53.3 to 125.3% with relative standard deviations ranging from 1.4 to 16.0%. The limits of quantification for (−)-oxathiapiprolin and (+)-oxathiapiprolin were 0.005 mg/kg in romaine lettuce, head cabbage, potato, grape, and garlic, 0.01 mg/kg in soybean and pea, and 0.025 mg/kg in green tea and dry pepper. The limits of quantification of IN-E8S72 were twice those of (−)-oxathiapiprolin. Screening results with real market samples indicated that there was no enantiomeric excess in the oxathiapiprolin residue in romaine lettuce.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enantioselective residue analysis of oxathiapiprolin and its metabolite in tea and other crops by ultra‐high performance liquid chromatography–tandem mass spectrometry

Zhang

Sun

Wang

et al. 2020

J of Separation Science

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“…All experimental solutions were incubated in a 30°C, 160 RPM shaker for 7 days. After culturing, samples were prepared according to the method of Zhang et al (2018) and degradation was analyzed by UV detection or HPLC ( Zhang et al, 2018 ). The experimental methods of other fungicides (propiconazole, hexazolol, tebutazol, etc.)…”

Section: Methodsmentioning

confidence: 99%

Construction and Characterization of an Intergeneric Fusant That Degrades the Fungicides Chlorothalonil and Carbendazim

et al. 2022

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Bordetella sp. CTN-16 (GenBank FJ598326) can degrade chlorothalonil (CTN) but not carbendazim (MBC), and Microbacterium sp. MBC-3 (GenBank OK667229) can degrade MBC but not CTN. A functional strain BD2 was obtained by protoplast fusion of CTN-16 and MBC-3 to generate a fusant with improved degradation efficiency of CTN and MBC. Fusant-BD2 with eighth transfer on a medium containing CTN and two antibiotics was obtained. To identify and confirm the genetic relationship between parental strains and fusion strain BD2, scanning electron microscopy (SEM), random amplified polymorphic DNA (RAPD), and 16S ribosomal RNA (rRNA) gene sequences analysis were carried out. SEM analysis illustrated BD2 and its parents had some slight differences in the cell morphology. Fusant-BD2 not only possessed the same bands as parental strains but also had its specific bands analyzed through RAPD. The genetic similarity indices for BD2 and its parental strains CTN-16 and MBC-3 are 0.571 and 0.428, respectively. The degradation rates of CTN and MBC were 79.8% and 65.2% in the inorganic salt solution containing 50 mg·L−1 CTN and 50 mg·L−1 MBC, respectively, and the degradation efficiencies were better than the parental strains CTN-16 and MBC-3. This study provides a prospect for the application of fusion strain BD2 in bioremediation of CTN and MBC contaminated sites.

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“…UPC 2 integrates supercritical fluid chromatography and UHPLC [17]. Recently, several studies on the application of supercritical fluid chromatography and UPC 2 in separating triazole fungicides [18][19][20][21][22][23], acaricide cyflumetofen [24], neonicotinoid insecticides [25], and organophosphorus insecticide [26] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Analytical research on the separation and residue of chiral pesticide triadimenol in fruit and vegetable puree

Zhang¹,

Xie²,

Hou³

et al. 2021

J of Separation Science

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In this paper, a method for the separation of triadimenol stereoisomers using ultra-performance convergence chromatography and an analytical method for the determination of triadimenol stereoisomer residues in pumpkin puree, apple puree, and tomato puree as a supplement for infants are established. Test samples were extracted with acetonitrile and successively purified with graphitized carbon black and Florisil column. Afterward, Acquity Trefoil AMY1 column was adopted for chiral separation of chromatographic column, and gradient elute was carried out with supercritical carbon dioxide-methanol as the mobile phase and with external standard method for quantitation. Results showed that the linearly dependent coefficient of the four kinds of triadimenol stereoisomers within 1.0 and 50 mg/L was greater than 0.9997, and the limit of quantitation of the four kinds of triadimenol stereoisomers was 0.05 mg/kg. Recovery experiment was carried out within 0.05 and 1.0 mg/kg scope, the recoveries were 81.0-107%, and the relative standard deviation was 2.3-7.6%. This method implemented the separation of triadimenol stereoisomers and its residue test in pumpkin puree, apple puree, and tomato puree as a supplement for infants, and it can provide reliable technical support for the analysis of pesticide residue and assessment of product quality.

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Application and enantiomeric residue determination of diniconazole in tea and grape and apple by supercritical fluid chromatography coupled with quadrupole-time-of-flight mass spectrometry

Cited by 20 publications

References 44 publications

Enantioselective residue analysis of oxathiapiprolin and its metabolite in tea and other crops by ultra‐high performance liquid chromatography–tandem mass spectrometry

Enantioselective residue analysis of oxathiapiprolin and its metabolite in tea and other crops by ultra‐high performance liquid chromatography–tandem mass spectrometry

Construction and Characterization of an Intergeneric Fusant That Degrades the Fungicides Chlorothalonil and Carbendazim

Analytical research on the separation and residue of chiral pesticide triadimenol in fruit and vegetable puree

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