两步液液萃取-固相萃取净化结合高效液相色谱-串联质谱法测定猪肉中11种磺胺类兽药残留

引用本文: 刘培勇, 张惠, 米之金, 张良成, 张光仁. 两步液液萃取-固相萃取净化结合高效液相色谱-串联质谱法测定猪肉中11种磺胺类兽药残留[J]. 色谱, 2019, 37(10): 1098-1104. doi: 10.3724/SP.J.1123.2019.04005 shu

Citation: LIU Peiyong, ZHANG Hui, MI Zhijin, ZHANG Liangcheng, ZHANG Guangren. Determination of 11 sulfonamides in pork by two-step liquid-liquid extraction-solid phase extraction purification coupled with high performance liquid chromatography-tandem mass spectrometry[J]. Chinese Journal of Chromatography, 2019, 37(10): 1098-1104. doi: 10.3724/SP.J.1123.2019.04005 shu

两步液液萃取-固相萃取净化结合高效液相色谱-串联质谱法测定猪肉中11种磺胺类兽药残留

达州市食品药品检验所, 四川达州 635000

摘要: 建立了猪肉中11种常见的磺胺类兽药残留的两步液液萃取-固相萃取净化-高效液相色谱-串联质谱（LC-MS/MS）检测方法。猪肉样品经乙酸乙酯（含2%（v/v）甲酸）及丙酮分两步液液萃取，正己烷脱脂，Oasis MCX混合阳离子固相萃取小柱净化，氮吹浓缩，定容，过滤膜后进行高效液相色谱-串联质谱分析。采用多反应监测正离子模式进行检测，以基质校准曲线外标法定量。结果表明，在20~400 μg/L范围内11种磺胺类药物均呈现良好的线性关系（相关系数（r²）≥ 0.99），检出限（LODs）（S/N=3）和定量限（LOQs）（S/N=10）分别为0.1~1.0 μg/kg和0.2~3.0 μg/kg。对阴性猪肉样品，在50、100、200 μg/kg 3个水平下分别进行加标回收试验，测得各待测物的平均回收率为79.3%~105.5%之间，相对标准偏差为1.3%~11.6%（n=6）。该方法比采用一步液液萃取法具有更高的提取效率，同时结合固相萃取净化方法进一步富集目标化合物，降低了基质干扰，提高了检测灵敏度。

关键词:

English

Determination of 11 sulfonamides in pork by two-step liquid-liquid extraction-solid phase extraction purification coupled with high performance liquid chromatography-tandem mass spectrometry

Dazhou Food and Drug Inspection Institute, Dazhou 635000, China
Received Date: 02 April 2019

Abstract: A method based on two-step liquid-liquid extraction-solid phase extraction purification coupled with high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for the determination of 11 common sulfonamides in pork. The samples were extracted first with ethyl acetate containing 2%(v/v) formic acid and then with acetone for the second step. The supernatant was degreased with n-hexane and cleaned using an Oasis MCX SPE column. Finally, nitrogen was blown over the obtained mixture, and the mixture was filtered for conducting HPLC-MS/MS analysis. The sulfonamides were detected in the multiple reaction monitoring positive ion mode, and quantification was performed by employing the external standard method with matrix calibration curves. All the 11 sulfonamides demonstrated good linearity in the range of 20-400 μg/L, with the correlation coefficient (r²) higher than 0.99. The limits of detection (LODs; S/N=3) and limits of quantification (LOQs; S/N=10) were found to be in the ranges of 0.1-1.0 μg/kg and 0.2-3.0 μg/kg, respectively. Furthermore, the results indicated that the average recoveries of the 11 sulfonamides ranged from 79.3% to 105.5% at three spiked levels of 50, 100, and 200 μg/kg, with the relative standard deviations (RSDs) in the range of 1.3%-11.6% (n=6). This method showed higher extraction efficiency than the one-step liquid-liquid extraction, and the detection sensitivity was highly improved.

Key words:

high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS)
/ two-step liquid-liquid extraction
/ solid phase extraction (SPE)
/ sulfonamides
/ veterinary drug residues
/ pork

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沈阳化工大学材料科学与工程学院沈阳 110142

两步液液萃取-固相萃取净化结合高效液相色谱-串联质谱法测定猪肉中11种磺胺类兽药残留

English

Determination of 11 sulfonamides in pork by two-step liquid-liquid extraction-solid phase extraction purification coupled with high performance liquid chromatography-tandem mass spectrometry

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中国化学会秘书处

两步液液萃取-固相萃取净化结合高效液相色谱-串联质谱法测定猪肉中11种磺胺类兽药残留

English

Determination of 11 sulfonamides in pork by two-step liquid-liquid extraction-solid phase extraction purification coupled with high performance liquid chromatography-tandem mass spectrometry

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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