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11.
Halimah B. Muhamad Tan Yew Ai Ismail B. Sahid 《Journal of environmental science and health. Part. B》2013,48(2):134-140
The purpose of this study was to develop a method for the determination of fluroxypyr (4-amino-3,5-dichloro-6-fluro2-pyridyloxyacetic acid) residue in palm oil namely crude palm oil (CPO) and crude palm kernel oil (CPKO). The method involves the extraction of the herbicide from the oil matrix followed by low temperature precipitation and finally quantification of the residues using the high performance liquid chromatography (HPLC). The extraction efficiency of the method was evaluated by conducting recovery studies. The recovery of fluroxypyr from the fortified CPO samples ranged from 78%–111% with the relative values for the coefficient of variation ranging from 1.4 to 8.6%. Furthermore, the recovery of fluroxypyr from the spiked CPKO samples ranged from 91–107% with the relative values for the coefficient of variation ranging from 0.6 to 4.5%. The minimum detection limit of fluroxypyr in CPO and CPKO was 0.05 μg/g. The method was used to determine fluroxypyr residues from the field-treated samples of CPO and CPKO. When fluroxypyr was used for weed control in oil palm plantations no residue was detected in CPO and CPKO irrespective of the sampling interval and the dosage applied at the recommended or double the manufacturer's recommended dosage. 相似文献
12.
Raguraj Sriharan Kasim Susilawati Jaafar Noraini Md Nazli Muhamad Hazim Amali Rathnasekara Kuruppu Arachchige 《Environmental science and pollution research international》2022,29(40):60631-60640
Environmental Science and Pollution Research - Emerging demand for humic substances escalated the short supply of coal-related resources from which humic substances are extracted in large... 相似文献