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单项选择题二乙基二硫代氨基甲酸银分光光度法测定水中砷,当试样取最大体积50ml、用10mm比色皿时,可检测水中砷的上限浓度为()mg/L,最低检出浓度为()mg/L。

A、0.10,0.001

B、0.30,0.003

C、0.50,0.007

D、0.70,0.005

  • C
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