Occurrence and Distribution Study of Residues from Pesticides Applied under Controlled Conditions in the Field during Rice Processing
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- 作者：Luc铆a Pareja ; Marcos Colazzo ; Andr茅s P茅rez-Parada ; Natalia Besil ; Horacio Heinzen ; Bernardo B枚cking ; Ver贸nica Cesio ; Amadeo R. Fern谩ndez-Alba
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2012
- 出版时间：May 9, 2012
- 年：2012
- 卷：60
- 期：18
- 页码：4440-4448
- 全文大小：289K
- 年卷期：v.60,no.18(May 9, 2012)
- ISSN：1520-5118
文摘
The results of an experiment to study the occurrence and distribution of pesticide residues during rice cropping and processing are reported. Four herbicides, nine fungicides, and two insecticides (azoxystrobin, byspiribac-sodium, carbendazim, clomazone, difenoconazole, epoxiconazole, isoprothiolane, kresoxim-methyl, propanil, quinclorac, tebuconazole, thiamethoxam, tricyclazole, trifloxystrobin, 位-cyhalotrin) were applied to an isolated rice-crop plot under controlled conditions, during the 2009鈥?010 cropping season in Uruguay. Paddy rice was harvested and industrially processed to brown rice, white rice, and rice bran, which were analyzed for pesticide residues using the original QuEChERS methodology and its citrate variation by LC-MS/MS and GC-MS. The distribution of pesticide residues was uneven among the different matrices. Ten different pesticide residues were found in paddy rice, seven in brown rice, and eight in rice bran. The highest concentrations were detected in paddy rice. These results provide information regarding the fate of pesticides in the rice food chain and its safety for consumers.