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congjia0302

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[求助] 用发光菌测定氯化汞毒性

我最近在用发光菌测定氯化汞的毒性,发光菌用的是培养了12个小时,达到对数生长期的菌液,然后氯化汞的浓度梯度是按照国标的配比设置的0.02,0.06,0.08,0.1,0.14,0.18mg/L。但是在做的过程中,测得光子量抑制率非常的高,并没有显示出梯度,按照国标说明的Ec50值应该在0.1的那个浓度,但是在实际的测量中,最低浓度0.02时抑制率就已经接近50%了,接下来的几个浓度抑制率都已经接近百分之百了。这是怎么回事,浓度配制是没有问题的,按照国标配制并稀释。
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