摘要
建立了阳离子交换模式在线固相萃取-液相色谱串联质谱法检测牛奶中14种磺胺药物方法。取5 g样品用15 mL乙腈提取和除蛋白,提取液于50℃氮气吹干后,用1.00 mL 0.2％甲酸溶解,溶解液通过双三元液相色谱用阳离子在线固相萃取柱在线富集净化,2％氨水甲醇/0.2％甲酸（50：50,V/V）洗脱。然后转移至C18色谱柱上进行分离,再用串联四级杆质谱检测。结果表明,14种磺胺类药物在0.1～10μg/kg含量范围内线性良好（r≥0.999）；方法的检出限为0.05μg/kg,定量限为0.1μg/kg；方法回收率在60％～90％范围内,批内和批间相对标准偏差都小于10％。本方法较传统固相萃取柱净化法更简捷、经济和稳定。
To determine the residue of 14 sulfonamides in milk, a high performance liquid chromatography-tandem mass spectrometry （ HPLC-MS/MS ） method with on-line soild phase extraction （ SPE ） in cation exchange mode was established. 5 g of milk was extracted with 15 mL acetonitrile. Then the extraction was evaporated by 50 ℃ nitrogen and dissolved by 1. 00 mL 0. 2% formic acid. The dissolution was enriched and purified by MS/MS cation exchange on-line SPE column on a double ternary liquid chromatography, and eluted by the mixed solution of 2% ammonia methanol and 0. 2% formic acid （50：50, V/V）. The compounds were separated by an octadecyl silica bonded column and determined by the tandem mass spectrometry. The results showed that the linearity of 14 sulfonamides was good in the range of 0 . 1–10 μg/kg （ r≥0 . 9995 ） . The LOD of the method was 0. 05 μg/kg, while the LOQ was 0. 1 μg/kg. The recoveries of the 14 sulfonamides were in the range of 60 %-90 %, while the inter-batch and intra-batch RSDs were all lower than 10%. The method was proved to be more convenient, economical and stable than the traditional SPE column method.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2014年第12期1759-1766,共8页
Chinese Journal of Analytical Chemistry
基金
国家公益性行业(农业)科研专项(No.20120323)资金资助~~
关键词
在线固相萃取
阳离子交换
双三元液相色谱-串联质谱法
磺胺类药物
牛奶
On-line solid phase extraction
Cation exchange
Double ternary liquid chromatography-tandem mass spectrometry
Sulfonamides
Milk
