composite sample

composite sample

[kəm′päz·ət ′sam·pəl]
(analytical chemistry)
A sample comprising two or more increments selected to represent the material being analyzed.

composite sample

A sample of material which is obtained by blending two or more individual samples.
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References in periodicals archive ?
So, for example, if a charge has a true mean retention near the specification level, but has large underlying variation, then a future composite sample from that charge has a greater chance of being below the specification than if the charge has smaller underlying variation.
of ECPN stated, "Results from extensive testing of a composite sample used in this exercise indicate meaningfully higher gold and silver results and somewhat lower platinum group metal results than obtained with the previously-employed caustic fusion procedures.
Two drilling teams will commence work within the next few weeks and begin geological assessment by preparing a bulk composite sample for metallurgical testing.
At each of 139 sites in 30 states, one composite sample was drawn from 4-6 strata within a cross-section of the waterway.
Five Theseus drill-hole samples were combined to make a composite sample suitable for bottle roll leaching tests.
A single composite sample has been taken and assayed.
A composite sample of fillets from five carp found in one stream contained 47,900 [micro]g/kg total PBDEs, "rivaling the highest fillet burdens reported in the world so far," the report states.
The tests indicated that, at all 3 cement dosage rates, the composite sample was able to form an agglomerated product that was visually acceptable.
The remaining composite sample was weighed and transferred to the extraction vessel and a volume of extraction fluid (in milliliters) equal to 20 times the mass of the sample (in grams) was added.
There is a possibility that the composite sample collected in this study did not represent the quality of all runoff from a given plot, since any runoff in excess of the sample container's capacity dropped into the container and displaced an equal volume which was not saved.

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