Effect of rice bran processing into oil on C-carbofuran residues
1995
Yongyuth Phaikaew | Ratana Sitayoung | Prapassara Pimpan (Department of Agriculture, Bangkok (Thailand). Agricultural Toxic Substances Div.)
Effects of processing rice bran into refined oil on 14C-carbofuran residues were studied under field conditions and in fortified oil samples. The results showed that only 0.52 percent of the field applied 14C-carbofuran was present in rice bran. Of this amount, crude oil retained 11.6 percent, compared to 86 percent in the fortified sample. When crude oils were subjected to degumming and neutralization processes, radioactivity substantially declined to 1 percent and 14 percent for aged and fortified residues respectively. Bleaching and deodorization were ineffective in eliminating residues from spiked samples. Carbofuran, 3-hydroxycarbofuran, 3-keto carbofuran and carbofuran phenol, were indentified in the crude and refined oils obtained from the field experiment. It is concluded that the commercially adopted procedures efficiently remove carbofuran and its products present in oil.
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