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.
Each composite sample
was ground in 10 kg batches in a laboratory rod mill to approximately 80% passing 75 ?
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.
To test this postulation, we quench the composite sample
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.