建立了超高效液相色谱/质谱快速、准确、高灵敏度地测定水体中痕量微囊藻毒素(MCYST)的分析方法,并用于实际样品的分析.采用固相萃取法富集净化样品.该法在5 min内即可完成4种MCYST(LR、RR、LW、LF)的分离及检测;LR、RR、LW、LF的定量检测限、回收率分别为1.3~6.0 ng/L、91.1% ~111% ;工作曲线的线性相关系数大于0.99,线性范围达3个数量级.实际样品分析表明,在所测定的水库水样中均检出了LR和RR,其质量浓度分别为0.044 7~2.73 μg/L和0.020 8~1.36 μg/L;而在所有的检测样品中均未检出LW和LF.
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