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采用田间试验方法对邻苯二甲酸酯在冬瓜、花椰菜、辣椒不同部位的分布特征进行了研究。结果表明,在相同的设施大棚种植条件下,三种蔬菜不同部位的邻苯二甲酸酯含量存在显著差异,冬瓜叶柄、叶、主茎的邻苯二甲酸酯含量显著高于根、瓜皮、瓜肉,而花椰菜和辣椒根中邻苯二甲酸酯含量显著高于叶、茎和果实;三种蔬菜可食部位主要的邻苯二甲酸酯化合物均为邻苯二甲酸二丁酯(DBP)和邻苯二甲酸二(2-乙基己基)酯(DEHP),占邻苯二甲酸酯总量比例高达95%以上;三种蔬菜可食部位4种邻苯二甲酸酯的富集系数介于0.016-0.241之间,对DBP和DEHP富集系数较高的蔬菜为冬瓜,对邻苯二甲酸二甲酯(DMP)富集系数较高的蔬菜为花椰菜。
The distribution characteristics of phthalates in different parts of wax gourd, cauliflower and pepper were studied by field test. The results showed that there were significant differences in the contents of phthalate esters in different parts of the three vegetables under the same greenhouse cultivation conditions. The content of phthalate esters in petioles, leaves and main stems of melon was significantly higher than that of roots and melons Skin and melon meat, while the contents of phthalate esters in cauliflower and capsicum roots were significantly higher than those in leaves, stems and fruits. The main phthalate compounds in the edible parts of the three vegetables were all dibutyl phthalate (DBP) and di (2-ethylhexyl) phthalate (DEHP), accounting for more than 95% of the total phthalates; three kinds of vegetable edible parts of four kinds of phthalic acid The enrichment coefficients of esters ranged from 0.016 to 0.241. The waxes with higher enrichment coefficients of DBP and DEHP were wax gourd, while the vegetables with higher DMP enrichment ratios were cauliflower.