气相色谱-三重四极杆质谱联用仪测定含油调料品中邻苯二甲酸酯类增塑剂的含量

应用气相色谱-三重四极杆质谱联用仪(GC-MS/MS)测定含油调料品中邻苯二甲酸酯类增塑剂含量。采用液液萃取的方法对目标化物进行净化提取,氮吹全干后用正己烷复溶,在MRM模式下进行质谱测定。23种邻苯二甲酸酯类增塑剂的浓度在25 μg/L~500 μg/L范围内与其峰面积呈线性相关,其中邻苯二甲酸二异壬酯(DINP)与邻苯二甲酸二异癸酯(DIDP)方法检出限(S/N=3)为0.038 mg/kg,其他21种邻苯二甲酸酯类增塑剂的检出限(S/N=3)为0.008 mg/kg。以含油调料品为基质进行加标回收实验,所得回收率在80.6 %~120 %之间。

Determination of Residual Amounts of 23 phthalic acid esters in condiment with oilby gas chromatography tandem mass spectrometry

The residual amounts of 23 phthalic acid esters in condiment with oil was determined by gas chromatography tandem mass spectrometry(GC-MS/MS). The target was purified and extracted by liquid-liquid extraction, After the nitrogen was blown completely, the solution was dissolved by n-hexane, then the target was determined by gas chromatography tandem mass spectrometry(GC-MS/MS)in MRM mode. The concentration of phthalic acid esters was linearly related to their peak area in the range of 25 g/L ~500 g/L. The detecting limit (S/N=3) of Diisononyl ortho-phthalate(DINP)and Diisodecyl ortho-phthalate(DIDP)was 0.04 mg/kg, The other 21 phthalic acid esters, the detecting limit (S/N=3) was 0.01 mg/kg. On the base of condiment with oil, test for recovery was made by stander addition method, The recovery is between 80.6 %~120 %.