Frequently asked questions

8Why measure a Blank before measuring samples?9Why must the Blank match the sample matrix?10What is microvolume spectrophotometry?11Why can a liquid column remain between the measurement surfaces?12Why do microvolume measurements often use a short path length?13What does normalization to a 1 cm path length mean?14Why does path-length error directly affect concentration?15How should a stated path-length control specification be interpreted?16Why might different concentrations need different path lengths?17How can consistency between multiple short path lengths be verified?

Why does path-length error directly affect concentration?

Concentration is calculated as A/(εb). Other conditions being equal, relative path-length error propagates approximately into the concentration result.

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