Residue behaviors and dietary risk assessment of dinotefuran and its metabolites in Oryza sativa by a new HPLC–MS/MS method

Li, Rui-juan; Liu, Tongjin; Cui, Shuhua; Sicong, Zhang; Yu, Jianlei; Song, Guochun

doi:10.1016/j.foodchem.2017.04.181

Cited by 49 publications

(25 citation statements)

References 18 publications

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“…The terminal residues of propiconazole gradually increased with increasing application doses and reduced as the sampling interval extended in the crops. However, there are differences in terminal residue levels across different locations, which may be related to crop varieties, the weather, application time, and other factors 28–30 . The STMRs of propiconazole were 1.60 mg kg −1 and 0.002 mg kg −1 , and the HRs were 10.32 mg kg −1 and 0.037mg kg −1 in celery and onion respectively.…”

Section: Resultsmentioning

confidence: 99%

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Bai

Chen

et al. 2020

J Sci Food Agric

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BACKGROUND Propiconazole is widely used to control fungal diseases in field crops, including celery and onion. The potential risk to the environment and human health has aroused much public concern. Therefore, it is significant to investigate the degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion. RESULTS A sensitive analytical method for determination of propiconazole residue in celery and onion was established and validated through high‐performance liquid chromatography tandem mass spectrometry. The average recovery rate of propiconazole ranged from 85.7% to 101.8%, with a relative standard deviation of 2.1–6.3%. For the dissipation kinetics, the data showed that propiconazole in celery and onion was degraded, with half‐lives of 6.1–6.2 days and 8.7–8.8 days respectively. In the terminal residue experiments, the residues of propiconazole were below 4.66 mg kg−1 in celery after application two or three times and were below 0.029 mg kg−1 in onion after application of three or four times with an interval of 14 days under the designed dosages. The chronic and acute dietary exposure assessments for propiconazole were valued by risk quotient, with all values being lower than 100%. CONCLUSION Propiconazole in celery and onion was rapidly degraded following first‐order kinetics models. The dietary risk of propiconazole through celery or onion was negligible to consumers. The study not only offers a valuable reference for reasonable usage of propiconazole on celery and onion, but also facilitates the establishment of maximum residue limits in China. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Bai

Chen

et al. 2020

J Sci Food Agric

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“…After the study, we used 50 mg of PSA, 50 mg of C 18 and 50 mg of GCB for purification because of their capability to remove impurities and satisfactory recovery. In some research on pesticide residue determination in rice or other cereals, (Li, Liu, Cui, et al, 2017b). The standard, blank and spiked sample chromatograms showed identical retention times without interference (Figure 2), which indicated that the method was selective and specific.…”

Section: Methods Validationmentioning

confidence: 88%

“…In some research on pesticide residue determination in rice or other cereals, the combined use of several sorbents for purification achieved good results (Grande‐Martínez, Arrebola‐Liébanas, Martínez‐Vidal, Hernández‐Torres, & Garrido‐Frenich, ; Li et al, ; Walorczyk & Drożdżyński, ). For example, Li et al selected the purification method with 30 mg C 18 , 30 mg PSA and 20 mg GCB for the rice plant samples to detect dinotefuran and its metabolites by HPLC–MS/MS (Li, Liu, Cui, et al, ). The standard, blank and spiked sample chromatograms showed identical retention times without interference (Figure ), which indicated that the method was selective and specific.…”

Section: Resultsmentioning

confidence: 99%

“…(kg) (Yu et al, ) where IESTI is the international estimated short–term intake, FI is the food intake, HR is the highest residue level and IF is the infusion factor. According to the Chinese Dietary Guidelines, the daily intake of rice and its products in the dietary pattern of the Chinese population is generally 0.2399 kg per capita, and the average body weight in China is 63 kg (Li, Liu, Cui, et al, ). The highest residue of dimethachlon in rice is 7.58 mg/kg, and the IF is 0.032 from the average processing factor of cooking rice product in our study.…”

Section: Resultsmentioning

confidence: 99%

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Residual level of dimethachlon in rice‐paddy field system and cooked rice determined by gas chromatography with electron capture detector

Sun

Zeng

Zhong

et al. 2018

Biomedical Chromatography

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In this study, a modified quick, easy, cheap, effective, rugged and safe method coupled with gas chromatography with electron capture detection was established to determine dimethachlon residues in paddy soil, rice husk, rice straw, brown rice and cooked rice. The limits of quantification of dimethachlon were 0.01 mg/kg for paddy soil, brown rice and cooked rice and 0.02 mg/kg for rice straw and rice husk. The mean recoveries were in the range 78.59-104.7% with relative standard deviation values of <10% for dimethachlon in the five matrices. For field experiments, the final residues of dimethachlon in paddy soil were < 0.05 mg/kg and were < 1.21 mg/kg in rice straw from six sites. The final residues of dimethachlon in the brown rice at 21, 28 and 35 days after spraying from six sites were 0.08-7.58 mg/kg, and 0.16-30.1 mg/kg in rice husk. Our six test sites covered the main rice-producing areas of China. The routine rice cooking process of a Chinese family could apparently increase the removal of dimethachlon in rice compared with brown rice, and the reduction ratios were > 96%.

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“…The mobile phase gradient decreased from 99% to 60%. The flow rate was 0.3 mL/min (Li R. et al, 2017…”

Section: Determination Of Pigment Composition and Contentmentioning

confidence: 99%

Weedy Rice as a Novel Gene Resource: A Genome-Wide Association Study of Anthocyanin Biosynthesis and an Evaluation of Nutritional Quality

Wang

Zhao²,

Zhang³

et al. 2020

Front. Plant Sci.

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The pericarp color of rice grains is an important agronomic trait affected by domestication, and the color pigment, anthocyanin, is one of the key determinants of rice nutritional quality. Weedy rice, also called red rice because its pericarp is often red, may be a novel gene resource for the development of new rice. However, the genetic basis and nutritional quality of anthocyanin are poorly known. In this study, we used a genome-wide association study (GWAS) to find novel and specific QTLs of red pericarp in weedy rice. The known key gene site of red pericarp Rc was detected as the common genetic basis of both weedy and cultivated rice, and another 13 associated signals of pericarp color that were identified may contribute specifically to weedy rice pericarp color. We then nominated three pericarp color genes that may contribute to weedy rice divergence from cultivated rice based on selection sweep analysis. After clarifying the distribution and growth dynamics of pigment in weedy rice caryopsis, we compared its nutritional quality with cultivated rice. We found that sampled weedy rice pericarps had much greater quantities of anthocyanin, beneficial trace elements, free amino acids, and unsaturated fatty acids than the cultivated rice. In conclusion, the gene resources and novel genetic systems of rice anthocyanin biosynthesis explored in this study are of great value for the development of nutritious, high anthocyanin content rice.

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Residue behaviors and dietary risk assessment of dinotefuran and its metabolites in Oryza sativa by a new HPLC–MS/MS method

Cited by 49 publications

References 18 publications

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Study on degradation behaviour, residue distribution, and dietary risk assessment of propiconazole in celery and onion under field application

Residual level of dimethachlon in rice‐paddy field system and cooked rice determined by gas chromatography with electron capture detector

Weedy Rice as a Novel Gene Resource: A Genome-Wide Association Study of Anthocyanin Biosynthesis and an Evaluation of Nutritional Quality

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