Determination of RH‐5849 and indoxacarb in rice straw, rice husk, brown rice and soil using liquid chromatography–tandem triple quadrupole mass spectrometry following extraction with QuEChERS method

Li, Zhurui; Zhao, Xiaozhen; Chen, Jiaojiao; Wu, Yue; Zhang, Jing; Zhang, Kankan; Hu, Deyu

doi:10.1002/bmc.3732

Cited by 18 publications

(10 citation statements)

References 30 publications

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“…Matrix enhancement was observed for cyazofamid and CCIM in soil, with both matrix/solvent slope ratios >1 (1.02–1.24, Table ). Matrix suppression was observed for metalaxyl in all three matrices and cyazofamid and CCIM in two tobacco matrices, with the matrix/solvent slope ratios <1 (0.54–0.95, Table ) (Li et al, ; Zhang et al, ).…”

Section: Resultsmentioning

confidence: 99%

Simultaneous determination of residues of metalaxyl, cyazofamid and a cyazofamid metabolite in tobacco leaves and soil by liquid chromatography with tandem mass spectrometry

Sun

et al. 2018

Biomedical Chromatography

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A simple method was developed and validated for the simultaneous determination of metalaxyl, cyazofamid and the cyazofamid metabolite 4-chloro-5-p-tolylimidazole-2-carbonitrile (CCIM) by liquid chromatography with tandem mass spectrometry. The three target compounds were extracted from tobacco and soil with acetonitrile containing 0.1% acetic acid, and the extracts were purified using octadecylsilane. The proposed method showed satisfactory linearity (R ≥ 0.9985) for the target compounds. The limits of detection for metalaxyl, cyazofamid and CCIM were 0.006, 0.06 and 0.06 mg/kg in soil and green tobacco leaves and 0.03, 0.3 and 0.3 mg/kg in cured tobacco leaves, respectively. The limits of quantification for metalaxyl, cyazofamid and CCIM were 0.02, 0.2 and 0.2 mg/kg in soil and green tobacco leaves and 0.1, 1 and 1 mg/kg in cured tobacco leaves, respectively. The average recoveries from soil and tobacco were 72.91-98.40% for metalaxyl, 76.73-105.80% for cyazofamid and 74.48-106.45% for CCIM. The relative standard deviation range was 1.23-6.99%. The developed method was successfully applied to analysis of residues of metalaxyl, cyazofamid and CCIM in real soil and tobacco samples. The results indicated that the established method could meet the requirement for the analysis of trace amounts of all three analytes in soil and tobacco.

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Section: Resultsmentioning

confidence: 99%

Simultaneous determination of residues of metalaxyl, cyazofamid and a cyazofamid metabolite in tobacco leaves and soil by liquid chromatography with tandem mass spectrometry

Sun

et al. 2018

Biomedical Chromatography

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“…Indoxacarb dissipations were studies in cabbage, with a half-life of 1.92 and 2.88 days (Urvashi et al 2012) and 2.8–4.6 days (Sun et al 2012), in rice straw with a half-life of 5.83 days (Li et al 2016) and in decaying cotton gin trash with a half-life of 26 days (Crossan and Kennedy 2008). There are no publications available concerning dissipation of indoxacarb in apple fruit.…”

Section: Resultsmentioning

confidence: 99%

Dissipation of chlorantraniliprole, chlorpyrifos-methyl and indoxacarb—insecticides used to control codling moth (Cydia Pomonella L.) and leafrollers (Tortricidae) in apples for production of baby food

Szpyrka

Matyaszek

Słowik‐Borowiec

2017

Environ Sci Pollut Res

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Dissipations of three insecticides: chlorantraniliprole, chlorpyrifos-methyl and indoxacarb in apples were studied following their foliar application on apples intended for production of baby food. The apples were sprayed with formulations for control of codling moth (Cydia Pomonella L.) and leafrollers (Tortricidae). Six experiments were conducted; each insecticide was applied individually on dessert apples. A validated gas chromatography-based method with simultaneous electron capture and nitrogen–phosphorus detection (GC-ECD/NPD) was used for the residue analysis. The analytical performance of the method was satisfactory, with expanded uncertainties ≤36% (a coverage factor, k = 2, and a confidence level of 95%). The dissipations of insecticides were studied in pseudo-first-order kinetic models (for which the coefficient of determination, R 2, ranged between 0.9188 and 0.9897). Residues of studied insecticides were below their maximum residue limits of 0.5 mg/kg at an early stage of growth of the fruit. The half-lives of chlorantraniliprole, chlorpyrifos-methyl and indoxacarb were 16–17, 4–6 and 20–24 days, respectively. The initial residue levels declined gradually and reached the level of 0.01 mg/kg in 1 month for chlorpyrifos-methyl, 2 months for chlorantraniliprole and 2.5 months for indoxacarb. To obtain the insecticide residue levels below 0.01 mg/kg, which is the default MRL for food intended for infants and young children, the application of the studied insecticides should be carried out at recommended doses not later then: 1 month before harvest for chlorpyrifos-methyl, 2 months for chlorantraniliprole and 2.5 months for indoxacarb.Electronic supplementary materialThe online version of this article (doi:10.1007/s11356-017-8821-z) contains supplementary material, which is available to authorized users.

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“…The LODs and LOQs of the three analytes in the soil, green tobacco leaf and cured tobacco leaf samples were 0.024−0.06 and 0.08−0.2 mg/kg, respectively. The data presented in Table indicate that signal suppression was observed for clethodim, clethodim sulfoxide and clethodim sulfone in the three matrices (soil, green tobacco leaf and cured tobacco leaf) as the ME values ranged from −75.0 to −25.0% (Li et al, ; Utture et al, ).…”

Section: Resultsmentioning

confidence: 99%

Simultaneous determination and method validation of clethodim and its metabolites clethodim sulfoxide and clethodim sulfone in tobacco by LC‐MS/MS

Wang

Yang

et al. 2017

Biomedical Chromatography

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A simple method was developed and validated for the simultaneous determination of clethodim, clethodim sulfoxide, and clethodim sulfone in soil and tobacco by liquid chromatography with tandem mass spectrometry. The three target compounds were extracted from tobacco and soil with acetonitrile, and the extracts were purified using octadecyl silane. The proposed method showed satisfactory linearity (R ≥ 0.9973) for the target compounds. The limits of detection and quantitation of the three analytes in all matrices were 0.024-0.06 and 0.08-0.2 mg/kg, respectively. The recovery was tested in blank soil and tobacco leaf samples and calculated to be 74.8-104.4% with relative standard deviations of 1.9-12.1%. The developed method was successfully applied to the analysis of residues of clethodim, clethodim sulfoxide and clethodim sulfone in real soil and tobacco samples. The results indicated that the developed method can meet the requirements for the analysis of trace amounts of all three analytes in soil and tobacco.

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Determination of RH‐5849 and indoxacarb in rice straw, rice husk, brown rice and soil using liquid chromatography–tandem triple quadrupole mass spectrometry following extraction with QuEChERS method

Cited by 18 publications

References 30 publications

Simultaneous determination of residues of metalaxyl, cyazofamid and a cyazofamid metabolite in tobacco leaves and soil by liquid chromatography with tandem mass spectrometry

Simultaneous determination of residues of metalaxyl, cyazofamid and a cyazofamid metabolite in tobacco leaves and soil by liquid chromatography with tandem mass spectrometry

Dissipation of chlorantraniliprole, chlorpyrifos-methyl and indoxacarb—insecticides used to control codling moth (Cydia Pomonella L.) and leafrollers (Tortricidae) in apples for production of baby food

Simultaneous determination and method validation of clethodim and its metabolites clethodim sulfoxide and clethodim sulfone in tobacco by LC‐MS/MS

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