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Chemistry

The Principle Behind UV-Visible Spectrophotometry for Concentration Determination

Quick fact

The Beer-Lambert law allows a UV-Vis spectrophotometer to measure concentrations down to parts per million with just a single measurement, making it one of the most widely used analytical techniques in science and industry.

Why this is interesting

How can a beam of light tell us exactly how much of a substance is in a solution? It’s not magic—it’s a simple but powerful relationship called the Beer-Lambert law.