The phrase "a composite sample of" is correct and usable in written English.
It can be used in contexts involving scientific research, environmental studies, or any situation where multiple samples are combined for analysis.
Example: "The researchers collected a composite sample of soil from various locations to assess the overall contamination levels."
Alternatives: "a combined sample of" or "an aggregated sample of".
Table 1 Treatments for seasons 1 and 2 Treatment Composition C (n = 12) Each sample is a composite sample of three replicates.
Weekly to biweekly, a composite sample of the compost from each bin was analyzed.
A composite sample of the F3B and AE was taken and analyzed at the Auburn University Soils Laboratory for chemical properties (Table 1).
Each bottle was thoroughly mixed to have an even distribution of microbes, and then, equal volume of the sample from each bottle of water was taken and mixed together to have a composite sample of the desired volume.
A composite sample of 2 kg of each origin was taken, and three sub-samples of produced compost were taken from at least 70 cm depth at the shaded pile side to constitute a composite sample.
We tested a cost-effective sampling method for estimating whole-shrub water status by comparing δ13C values of the plant's largest stem against a composite sample of all stems.
Equal weights of each of the 10 samples for each food type were combined to form a composite sample to estimate average levels of chemical contamination in common U.S. foods.
Reductive extractions leached 0.9 1.1 nanomoles As per gram of sediment dry weight (nmol/g) from the < 2 mm size-fraction of sediments collected adjacent to the tracer test site and from the < 1 mm size-fraction of a composite sample comprised of sediments from the uncontaminated zone (Table III).
Based on the sample size distribution among the selected NYSC camps, a composite sample size of 1975 youth corps members was obtained for the study.
The kinetics of natural oxidant demand by permanganate was investigated using a composite sample made up of aquifer material collected from three different sites.
Sekine conducted shock-wave experiments by using a propellant gun that accelerated a stainless-steel disc into a composite sample simulating the components of meteorites, the ocean, and the atmosphere.
