高效液相色谱-串联质谱法同时测定中药材中的伏马毒素B_1和B_2

建立高效液相色谱-串联质谱法(HPLC-MS/MS)同时测定中药材中的伏马毒素B1和B2。样品用甲醇-水(80∶20)溶液提取,经免疫亲和柱净化后,以0.1%甲酸乙腈溶液-0.1%甲酸水溶液为流动相,通过C18色谱柱梯度洗脱,采用电喷雾离子源,正离子模式检测,内标法定量。伏马毒素B1和B2在0.5～500 ng.mL·1内线性关系良好。在4种不同基质5个加样水平的回收率实验中,伏马毒素B1的回收率为84.0%～96.1%,RSD为1.4%～7.6%;伏马毒素B2的回收率为86.3%～99.3%,RSD为1.2%～7.6%。自市售34种中药材样品中,选取10种中药材贮存于高温潮湿的条件中使其发霉,结果在上述发霉样品中有6个呈现阳性结果,其伏马毒素的总含量为82.4～2349μg.kg·1;在24种正常样品中有5种呈现阳性结果,其伏马毒素的总含量为102～729μg.kg·1。本文建立的分析方法灵敏可靠,适用于不同基质中药材中伏马毒素B1和B2的检测。

Simultaneous determination of fumonisins B1 and B2 in traditional Chinese medicines by high-performance liquid chromatography-tandem mass spectrometry

A rapid and sensitive analytical method was developed for the simultaneous determination of fumonisins B1 and B2 in traditional Chinese medicines by HPLC-MS/MS. The detection limits for fumonisins B1 and B2 were 0.25 ng x mL(-1) corresponding to 2 microg x kg(-1) in samples. Recoveries from different samples spiked with fumonisins B1 and B2 at levels ranging from 0.2 to 3 mg x kg(-1) were 84.0%-96.1% and 86.3%-99.3%, respectively. Among the total of 34 samples purchased from local markets, ten samples of which were visibly moldy samples due to inappropriate storage, and 24 were normal samples. The results showed that 6 of the visibly moldy samples and 5 of the normal samples were contaminated with total fumonisins at levels ranging 82.4-2349 microg x kg(-1) and 102-729 microg x kg(-1), respectively.