建立了快速溶剂萃取-反相高效液相色谱检测塑料中邻苯二甲酸二(2-乙基)己基酯(DEHP)和邻苯二甲酸二正辛酯(DNOP)的方法. 塑料样品经剪碎后,用二氯甲烷作溶剂经快速溶剂萃取,浓缩、过滤,用反相高效液相色谱Diamond-C18 柱 (250 mm×4.6 mm i.d.,5 μm)分离,V(乙腈):V(水)=95:5作流动相,流速1.0 mL/min ;用波长为254 nm紫外检测,外标法定量. 在DEHP和DNOP的质量浓度为0.1～100 mg/L范围内的线性关系良好,相关系数＞0.999. 加标回收率87%～108%,RSD＜5.20%,检测限为10 mg/L. 方法快速、简便易行,分离度较好,可作为测定塑料中增塑剂邻苯二甲酸酯类的方法.
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