duplicate sample

duplicate sample

[¦düp·lə·kət ′sam·pəl]
(analytical chemistry)
A second sample randomly selected from a material being analyzed in order to evaluate sample variance.
References in periodicals archive ?
Some of the features of the cyclone assembly are: a hydraulic upper knife valve and pneumatic lower knife valve for collecting and isolating the sample; a hydraulic hinge between the dump box and cone splitter that allows for easy cleaning; and a fixed cone splitter with primary and duplicate sample chutes.
A duplicate sample was also collected at RCC to determine variability of concentrations between samples.
It will test and confirm a reference sample to ensure that all sample preparation steps are within established limits; test and confirm a duplicate sample to prove that the results can be repeated within established limits; and, if applicable, check a blank sample to test for equipment contamination," says Lischefski.
Core samples from the Klaza property were processed in 36 sample batches with each batch including two assay standards, two blank samples, and one duplicate sample.
DAFF investigations are ongoing and results of analysis of a duplicate sample are awaited.
A duplicate sample was taken, as close as possible to the original
Duplicate sample collection was included in the study design for approximately 10 percent of all field samples, and of the total number of sediment samples (124) included in the study, 17 samples were collected in duplicate.
We had several duplicate sample sets in the testing scheme.
Concentration ranges of positive samples are presented without averaging duplicate sample results.
A standard sample, a blank sample, or a duplicate sample is inserted into the sample stream every tenth sample.