依次采用磷酸盐缓冲液(PBS)和甲醇-PBS溶液提取样品,以多功能免疫亲和柱净化,采用液相色谱-串联四极杆质谱检测,可同时测定中药材中的黄曲霉毒素B1、黄曲霉毒素B2、黄曲霉毒素G1、黄曲霉毒素G2、伏马毒素B1、伏马毒素B2、T-2毒素、HT-2毒素、赭曲霉毒素A(OTA)、玉米赤霉烯酮等14种真菌毒素.优化条件下,真菌毒素的定量限(LOQ)为1~5μg/kg,4种中药材基质(人参、桔梗、板蓝根、麦门冬)中3个不同添加水平的平均回收率(n=6)为71.9%~99.7%,相对标准偏差(RSD)为4.8%~15.8%.该方法的检测速度快,中药材复杂基质的干扰较少,结果准确、可靠,定量限可满足国内外中药材真菌毒素相关限量的要求.
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