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超高效液相色谱串联质谱法测定中药何首乌中10种真菌毒素的含量

2021-09-28白思宇陈倩雯冯伟红荣立新李春王智民

世界中医药 2021年17期

白思宇 陈倩雯 冯伟红 荣立新 李春 王智民

摘要 目的:建立超高效液相色谱串联-质谱同时测定何首乌中10种真菌毒素的方法。方法:样品经70%甲醇提取,再经亲水亲脂平衡(HLB)柱净化处理后进样分析。样品采用Welch Ultimate XB C18色谱柱(4.6 mm×100 mm,2.5 μm)进行分离,流动相为甲醇(A)-0.1%甲酸(含5 mmol/L乙酸铵)(B),梯度洗脱,流速为0.3 mL/min,柱温为40 ℃;采用电喷雾离子源(ESI)电离样品,多反应监测(MRM)模式下采用基质匹配标准曲线法进行定量分析。结果:10种真菌毒素在各自线性范围内线性关系良好(r>0.999 0),检测限(LODs)和定量限(LOQs)分别介于0.50~15 μg/kg和1.5~50 μg/kg之间。在低、中、高浓度下,10种真菌毒素的平均回收率为62.5%~116.1%;中浓度下,10种真菌毒素的精密度在2.8%~8.7%。结论:该法灵敏度高、结果准确可靠,适用于何首乌中多种真菌毒素的同步测定。

关键词 何首乌;真菌毒素;超高效液相色谱串联质谱法

Determination of the Quantities of 10 Mycotoxins in Polygoni Multiflori Radix by Ultra Performance Liquid Chromatography-tandem Mass Spectrometry

BAI Siyu1,2,CHEN Qianwen1,FENG Weihong1,RONG Lixin2,LI Chun1,WANG Zhimin1

(1 National Engineering Laboratory for Quality Control Technology of Chinese Materia Medica, Institute of Chinese Materia Medica,China Academy of Chinese Medical Sciences,Beijing 100700,China; 2 Guang′anmen Hospital,China Academy of Chinese Medical Sciences,Beijing 100053,China)

Abstract Objective:To develop a method for simultaneously determining 10 mycotoxins in Polygoni Multiflori Radix by Ultra Performance Liquid Chromatography-tandem Mass Spectrometry(UPLC-MS/MS).Methods:The samples were extracted by 70% methanol,then purified by HLB column and injected for analysis.The sample was separated on a column of Welch Ultimate XB C18 column(4.6 mm×100 mm,2.5 μm) with methanol -0.1% formic acid(containing 5 mmol/L ammonium acetate) as the mobile phase,gradient elution,at a flow rate of 0.3 mL/min.The column temperature was set at 40 ℃.The samples were ionized by electrospray ion source(ESI) and quantitatively analyzed by matrix matching standard curve method in multiple reaction monitoring(MRM) mode.Results:Good linear relationships of the 10 mycotoxins were achieved at their respective linear range(r>0.999 0).The limit of detection(LODs) and limit of quantification(LOQs) of the 10 mycotoxins were 0.50~15 μg/kg and 1.5~50 μg/kg,respectively.At low,medium and high levels,the average recoveries of the 10 mycotoxins ranged from 62.5% to 116.1%.At the medium level,the precision of 10 mycotoxines ranged from 2.8% to 8.7%.Conclusion:The method has high sensitivity,accurate and reliable results,and is suitable for the simultaneous determination of various mycotoxins in Polygoni Multiflori Radix.

Keywords Polygoni Multiflori Radix; Mycotoxin; Ultra Performance Liquid Chromatography-tandem Mass Spectrometry(UPLC-MS/MS)

中圖分类号:R284.1文献标识码:Adoi:10.3969/j.issn.1673-7202.2021.17.004

中药材在种植、采收、运输和贮藏过程中易受到多种真菌毒素污染,进而影响中药材质量、药品安全及合格率[1],这一点已经引起了业界和监管部门的高度重视。2010年版《中华人民共和国药典》(以下简称药典)中首次规定陈皮、胖大海、桃仁、酸枣仁和僵蚕5种中药中含有黄曲霉毒素总量不超过10 μg/kg,黄曲霉毒素B1(Aflatoxin B1,AFB1)不得超过5 μg/kg[2],2015年版药典中制定了黄曲霉毒素限量标准的品种增加至19种[3],2020年版药典增加至24种,而且给出了多种真菌毒素的单独测定或者联合测定的分析方法[4]。但是,中药基质复杂,而且不同中药基质不同,因此很难有一种方法适用于所有中药,不同品种样品处理方法和分析方法都有不同[5-7]。因此……

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