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【单选题】
-比尔定律为光的吸收定律，它是紫外吸收光度法定量分析的依据，其数学表达式是A=Kbc,K是常数，b指的是比色皿的光程，那么c指的是（ ）A.
待测溶液的质量
B.
待测溶液的浓度
C.
比色皿中溶液的浓度
D.
比色皿中溶液的质量
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A.
正确
B.
错误
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