What is a Composite Sample?

A composite sample is defined as a mixture of samples collected at regular intervals or from multiple locations over a specified period. This sampling method allows for a more representative analysis of variability in the substance being tested, as it accounts for changes in composition that may occur over time or distance. By combining multiple samples, the composite sample reflects an average condition, which can be crucial for various assessments, such as environmental monitoring or wastewater analysis.

The other options describe different sampling methodologies. A single sample collected at a time does not account for variability and only provides information representative of that specific moment. A collection of samples from multiple locations might suggest an averaging strategy but does not specify the regular intervals required to create a composite sample. Analyzed samples without delay do not contribute to the concept of compositing, as they imply immediacy rather than integration over time or distance.