ประสิทธิภาพของน้ำยาล้างผักต่อชนิดของสารกำจัดศัตรูพืชและปริมาณฟอร์มาลีนตกค้างในผัก
คำสำคัญ:
สารกำจัดศัตรูพืช, ฟอร์มาลีน, น้ำยาล้างผักบทคัดย่อ
The purpose of this study was to compare the pesticide reducing effectiveness of three commercial vegetable washing liquid brand by investigating the reductions in pesticide type and amount of formalin residue in five vegetables of; cabbage, long bean, eggplant, sweet basil and chili, collected from the local market and supermarket in Muang district, Surat Thani province. All of the five vegetables contained both of the organophosphate and carbamate residues such as cabofuran, carbaryl and chlorfenvinphos, and the organochlorine and pyrethroids residues such as endrin, DDT and endrosulfan. Formalin residue was detected in all five vegetables and the eggplant contained the highest amount of formalin. The amounts of formalin in five vegetables from market and supermarket was not significantly different (p <0.05). All three brands of the vegetable washing liquid could not fully remove pesticides and formalin residue. Brand 1 and 2 could remove organophosphate such as cabofuran but brand 3 removed organophosphate and carbamate such as chlorfenvinphos and carbaryl. All three brands of vegetable washing liquid not remove organochlorine due to they are high stability and break down very slowly. The maximum formalin reduction by using vegetable washing liquid brand 1, 2 and 3 were 20%, 21% and 24%, respectively. Therefore, consumers should use suitable types of vegetable washing liquid for each type of vegetable. In addition, official and consumer protection board should be surveillance in term of pesticide and formalin concentrations in vegetables for the safety of consumers.
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