Which method is commonly used to evaluate the presence of organic pollutants in water samples?

Spectrophotometry is commonly used to evaluate the presence of organic pollutants in water samples due to its ability to detect and quantify substances based on their light absorption characteristics. This method measures the intensity of light that passes through a sample, often using specific wavelengths to target particular compounds. Many organic pollutants absorb light at certain wavelengths, making spectrophotometry an effective tool for identifying and measuring their concentrations in water.

In contrast, filtration primarily serves as a physical method to separate solids from liquids and is less effective for analyzing the chemical composition of organic pollutants. Inert Gas Chromatography, while a powerful technique for separating and analyzing volatile organic compounds, is less commonly referenced in general water quality assessments compared to spectrophotometry. Volumetric Analysis involves measuring volumes of solutions to determine concentrations, which is more suited for inorganic analysis and titrations rather than specifically targeting organic compounds present in water samples.