Determination of thiamethoxam and its metabolite clothianidin residue and dissipation in cowpea by QuEChERS combining with ultrahigh-performance liquid chromatography–tandem mass spectrometry

Chen, Li; Li, Fugen; Jia, Chunhong; Yü, Ping; Zhao, Ercheng; He, Min; Jing, Junjie

doi:10.1007/s11356-020-11164-6

Cited by 23 publications

(18 citation statements)

References 33 publications

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“…The half-lives were in the range from 1.3 to 1.6 days. The results were similar to the half-lives of thiamethoxam in tomato (2.34 days) [ 24 ], goji berry [ 10 ] (1.01–1.08 days), cowpea [ 11 ] (0.8–1.6 days), and citrus [ 16 ] (1.9 days), reported by previous studies. For the Shandong site, the dissipation rate of thiamethoxam was more rapid than at the other three sites.…”

Section: Resultssupporting

confidence: 90%

“…Thiamethoxam degraded fast in crops, and clothianidin appeared readily as a plant metabolite [ 9 , 11 ], as suggested by Figure 1 . The amount of metabolite clothianidin on spinach after 2 h of application ranged from 0.092 to 0.51 mg kg −1 .…”

Section: Resultsmentioning

confidence: 99%

“…Crop species, pH value, rain, light intensity, and temperature were reported to play significant roles in affecting the degradation of thiamethoxam in crops [ 11 ]. In the following discussion, factors for degradation of thiamethoxamon spinach were investigated.…”

Section: Resultsmentioning

confidence: 99%

“…To date, many studies have been carried out on the dissipation behavior and dietary risk assessment of thiamethoxam and clothianidin on different matrices, including gogi berry [ 10 ], cowpea [ 11 , 12 ], strawberry [ 13 ], apple [ 14 , 15 ], citrus [ 16 ], mango [ 17 ], wheat [ 18 ], lettuce [ 18 ], and tomato [ 18 ]. For example, Rahman et al found that half-lives on Swiss chard were in reverse order of initial deposition [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

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Dissipation Behavior and Acute Dietary Risk Assessment of Thiamethoxam and Its Metabolite Clothianidin on Spinach

et al. 2022

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Thiamethoxam and its metabolite clothianidin residues pose a potential threat to human health. This study aims to investigate the residue behavior and acute dietary risk assessment of thiamethoxam and clothianidin on spinach. Thiamethoxam and clothianidin were extracted using a quick, easy, cheap, effective, rugged, safe (QuEChERS) method and analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS). At spike levels from 0.01 to 5 mg kg−1, the average recoveries of both analytes were in the range of 94.5–105.5%, with relative standard deviations (RSDs) of 3.8–10.9%. The dissipation behavior of thiamethoxam followed first-order kinetics, with half-lives of ≤1.6 days. Clothianidin appeared readily as a plant metabolite with highest level exhibited during 3 to 5 days after application. Temperature and light may be two main factors for degradation of thiamethoxam. Besides, acute risk assessment of thiamethoxam and clothianidin was evaluated with risk quotients (RQs) <100%, which suggested a low health risk for all consumer groups of Chinese residents.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Dissipation Behavior and Acute Dietary Risk Assessment of Thiamethoxam and Its Metabolite Clothianidin on Spinach

et al. 2022

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“…26 The half-life of thiamethoxam in potato and cowpea were 2.9 and 1.6 days, respectively. 13,27 The rate of degradation of pesticide residue is affected by environmental conditions, application rate, nature of the pesticide, formulation, and plant species. 24,28,29 The leaf characteristics of Chinese kale may affect how the thiamethoxam would be retained on the surface of the leaves and penetrated into the plant tissues, and different crops had different capacities for metabolizing thiamethoxam.…”

Section: Dissipation Kinetics Of Thiamethoxam In Chinese Kalementioning

confidence: 99%

Monitoring residue levels and dietary risk assessment of thiamethoxam and its metabolite clothianidin for Chinese consumption of Chinese kale

Chen

Zhang

et al. 2021

J Sci Food Agric

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BACKGROUND: Thiamethoxam is widely used to control pests in Chinese kale, popularly consumed leafy vegetables. The potential risk to the environment and human health has aroused much public concern. Therefore, it is important to investigate the degradation behavior, residue distribution and dietary risk assessment of thiamethoxam in Chinese kale.RESULTS: A sensitive analytical method for determination of thiamethoxam and its metabolite clothianidin residue in Chinese kale was established and validated through a quick, easy, cheap, effective, rugged, and safe (QuEChERS) technique with ultraperformance liquid chromatography tandem mass spectrometry (UPLC-MS/MS). The recoveries were 85.4-101.2% for thiamethoxam and 79.5-108.1% for clothianidin, with the relative standard deviations (RSDs) of 0.9-10.2% and 1.8-6.0%, respectively. For the dissipation kinetics, the data showed that thiamethoxam in Chinese kale was degraded with the half-lives of 4.1 to 4.5 days. In the terminal residue experiments, the residues of thiamethoxam were 0.017-0.357 mg kg −1 after application 2-3 times with a preharvest interval (PHI) of 7 days under the designed dosages. The chronic and acute dietary exposure assessment risk quotient (RQ) values of thiamethoxam in Chinese kale for different Chinese consumers were 0.08-0.19% and 0.05-0.12%, respectively, and those of clothianidin were 0.01-0.04% and 0.02-0.04%, respectively, all of the RQ values were lower than 100%.CONCLUSION: Thiamethoxam in Chinese kale was rapidly degraded following first-order kinetics models. The dietary risk of thiamethoxam and clothianidin through Chinese kale was negligible to consumers. The results from this study are important reference for Chinese governments to developing criteria for the safe and rational use of thiamethoxam, setting maximum residue levels (MRLs), monitoring the quality safety of agricultural products and protecting consumer health.

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Residue analysis and dietary risk assessment of thiamethoxam, flonicamid and their metabolites in cucumber under field conditions in China

2023

Environ Sci Pollut Res

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Determination of thiamethoxam and its metabolite clothianidin residue and dissipation in cowpea by QuEChERS combining with ultrahigh-performance liquid chromatography–tandem mass spectrometry

Cited by 23 publications

References 33 publications

Dissipation Behavior and Acute Dietary Risk Assessment of Thiamethoxam and Its Metabolite Clothianidin on Spinach

Dissipation Behavior and Acute Dietary Risk Assessment of Thiamethoxam and Its Metabolite Clothianidin on Spinach

Monitoring residue levels and dietary risk assessment of thiamethoxam and its metabolite clothianidin for Chinese consumption of Chinese kale

Residue analysis and dietary risk assessment of thiamethoxam, flonicamid and their metabolites in cucumber under field conditions in China

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