Which statement regarding nephelometry is correct?

Nephelometry is a technique used to measure the concentration of particles in a solution by analyzing the light scattered by these particles. The correct statement highlights that the detector response in nephelometry is indeed directly proportional to concentration. This means that as the concentration of the particles increases, the amount of light scattered and detected by the instrument also increases, allowing for quantitative measurements of the analyte in the sample.

This relationship is integral to the proper functioning of nephelometric methods, as it enables the determination of concentration based on the intensity of the scattered light. This aspect is critical because it differentiates nephelometry from other methods where the detector response might not linearly correlate with concentration, ensuring accurate and reliable results when measuring turbid solutions.

This relationship is fundamental for clinicians who rely on nephelometry to measure various substances, such as proteins or antibodies, assisting them in diagnosing conditions based on the concentration of specific analytes present in bodily fluids.