口服液体制剂中16种邻苯二甲酸酯类塑化剂残留量的研究

目的：建立气相色谱-质谱联用技术同时测定口服液体制剂中16种邻苯二甲酸酯类塑化剂的检测方法。比较液-液萃取和固相萃取对液体制剂的净化效果影响,并对操作参数进行优化,建立最佳试验条件。方法：分别采用液-液萃取和固相萃取两种样品前处理方式处理样品,采用选择离子监测,以碎片的丰度比定性,外标法定量。结果：采用液-液萃取方法前处理样品时基质的干扰大,杂质峰较多,故采用固相萃取方式对样品进行前处理,GC-MS检测口服液体制剂中16中邻苯二甲酸酯类塑化剂残留量,该方法检出限为0.02μg · g-1,在0.5~8.0μg · ml-1范围内,线性良好（相关系数 r 范围0.9907~0.9998）,加标回收率在71.7%~95.6%范围内,RSD为2.1%~9.7%。结论：采用固相萃取,GC-MS的方法对口服液体制剂中16中邻苯二甲酸酯类塑化剂进行检测,方法简便、快速、准确、灵敏度高,适用于口服液体制剂中16中邻苯二甲酸酯类塑化剂的测定。

Research on Residues of 16 Phthalate Ester Plasticizers in Oral Liquid Preparations

Objective：To establish a GC-MS method for the simultaneous determination of 16 phthalate ester plasticizers in oral liquid preparations, compare the purification effect of liquid preparations by liquid-liquid extraction and solid phase extraction and opti-mize the operating parameters to determine the optimal experimental conditions. Methods：The samples were operated by liquid-liquid extraction and solid phase extraction, respectively. Selective ion monitor （ SIM） was adopt, phthalate esters were identified by the rela-tive abundance of major characteristic ions and the content was determined by an external standard method. Results：When the samples were operated by liquid-liquid extraction, the interference was strong with many impurity peaks. Therefore, the solid phase extraction was adopted for the sample pretreatment. GC-MS was used to detect the residues of 16 phthalate ester plasticizers in oral liquid prepara-tions. The detection limit was 0. 02μg·g-1 ,while the calibration curve showed good linearity within the range of 0. 25-8. 0μg·ml-1 with the correlation coefficient between 0. 990 7 and 0. 999 8. The average recoveries were 76. 0%-95. 4%. The relative standard devi-ations were between 2. 3% and 9. 6%（n=6）. Conclusion： Pretreated by solid phase extraction, the residues of 16 phthalate ester plasticizers in oral liquid preparations can be detected by GC-MS with the properties of simple, fast, precise and sensitive, and it is suitable for the determination of phthalate esters in oral liquid preparations.