[Question of the Day] Chemical Engineering Analysis Edition, April 20, 2022
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In the spectrophotometric method using o-phenanthroline for the determination of trace iron in water, the reference solution is a BA solution used as a reference； B. Blank solution ； C. Sample reference ； D. Fading reference
B is a solution whose determination is carried out under exactly the same conditions as those used for determining the sample, in order to eliminate interference. The measured value is called the “blank value”"