冬瓜中DEHP 气相色谱- 质谱联用检测方法的建立

对冬瓜中邻苯二甲酸二(2- 乙基己基)酯(DEHP)的含量测定进行较为系统的研究，建立气相色谱- 质谱联用测定冬瓜中DEHP 含量的方法。结果表明：方法检出限(RSN ＝ 3)为2.65 × 10-3mg/kg，线性范围为0.0001～1.0mg/mL，加标回收率为87.69%～96.85%，平均相对标准偏差(RSD)为3.16%。该分析方法具有准确度高、选择性好、干扰少等特点，能满足冬瓜中DEHP 的分析要求，具有实际的应用检测价值。

GC-MS Determination of Di-2-ethylhexyl Phthalate in Fruits of Benincasa hispida

Benincasa hispida exhibits strong accumulation capacity towards di-2-ethylhexyl phthalate (DEPH), which proves to be carcinogenic. In the present study, a gas chromatography coupled with mass spectrometric method (GC-MS) was proposed for the determination of DEPH in fruits of Benincasa hispida, based on optimal DEPH extraction process. The developed standard curve of DEPH exhibited a good linearity over the range of 0.0001 to 1.0 mg/mL. The limit of detection (RS/N = 3) was 2.65×10-3 mg/kg. The recoveries for DEPH at 5 spike levels were between 87.69% and 96.85%, with an average RSD of 3.16%. The proposed method, thanks to its high accuracy, good selectivity and less interference, meets the requirements for the analysis of DEHP in fruits of Benincasa hispida so as to have a great application prospect.