食品中16种邻苯二甲酸酯类塑化剂的GC-MS检测方法研究

建立了同时测定不同类别食品中16种邻苯二甲酸酯类塑化剂的气相色谱-质谱(GC-MS)分析方法。对各种类别的食品采取不同的分离、净化方法;含油类样品经正己烷提取后,提取液用GPC凝胶色谱仪进行净化;采用GC EI/MS的选择离子检测方式(SIM)进行定性和定量分析。16种邻苯二甲酸酯的质量浓度在0.02~5 mg/L范围内呈良好线性,相关系数不低于0.999,检出限(S/N=3)为0.02 mg/kg。在0.4~2 mg/kg加标水平下的该方法回收率为75%~115%,相对标准偏差(RSD,n=3)为1.00%~10%。

Determination of 16 Phthalate Acid Esters in Foods by Gas Ghromatography-Mass Spectrometry

A gas chromatography-mass spectrometry method was developed for the smiultaneous determination of 16 phthalate acid esters(PAEs) in foods. Different separation and purification methods were selected according to the types of food,the oily samples were extracted with exane by ultrasonically assisted procedure , the extracts were cleaned up with GPC and determined by GC-MS. Within range of phthalate acid esters concentration of (0.02 ~5) mg/L, the peak area measured by this method had a good relationship with the phthalic esters concentration. All correlation coefficients were higher than 0.999.The detection lmiits achieved 0.02 mg/kg. The average recovery o f 16 phthalate acid esters was 75%~115% with the relative standard deviation o f 1%~10%.