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.