e,
感谢各位
是一个美国小孩问我的一个问题
A student is instructed to determine the concentration of a solution of CoCl2 based on absorption of light (spectrometric/colorimetric method).
The student handles the sample container (e.g., test tube or cuvette) that holds the unkown solution and leaves fingerprints in the path of the light beam. How will this affect the calculated concentration of the unkown? Explain your answer.
看来大家的答案一致啊，呵呵


【 在 hillhong 的大作中提到: 】
: 浓度不是跟绝对的吸光量有关，只有相对的吸光量有关
: 假设入射光强为I0，经手印后光强为I1，I1<I0
: 假设真实浓度为c，那么溶液的吸光度A=ebc=-log(I2/I1)
: ...................
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