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环境化学  2015 

土壤样品中微生物活性的荧光分析方法

Keywords: 荧光分析法,微生物活性,FDA水解

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Abstract:

以土壤为供试样品,基于荧光素二乙酸酯(FDA)水解反应产生的荧光素含量与土壤中微生物活性呈比例的现象,探讨了荧光光度法测定土样中微生物活性的可行性,提出采用荧光光度法测定环境样品中微生物活性的新方法.对测定所涉及的物理参数和化学参数进行了优化.在最佳实验条件下,方法的线性响应范围为荧光素含量2—2000μg·L-1,线性相关系数(r)=0.9971,方法的检出限(3σ)为3.1×10-2μg·L-1,方法的相对标准偏差(RSD)为2.8%(n=5),对4个土壤样品荧光素含量测定的回收率为90.6%—104%.所建立的方法具有简单快速、灵敏度高、线性范围宽、试样用量少等优点,可用于土壤、水等环境样品中微生物活性的测定.

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