Why potassium dichromate is used in uv calibration?
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Potassium dichromate is especially useful in the visible range but also useful in UV. Potassium dichromate itself is stable and avaialble in high purity. In dilute perchloric acid solution, it has a linear response with good temperature stability and also stable as solution. The peaks are well defined, molar absorptivity at 350 nm is accuratly known
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