control sample

control sample

[kən′trōl ‚sam·pəl]
(analytical chemistry)
A material of known composition that is analyzed along with test samples in order to evaluate the accuracy of an analytical procedure. Also known as check sample.
References in periodicals archive ?
The whisky was mixed with bits of charred oak to simulate the maturation process, and an identical control sample was housed at Ardbeg's Islay distillery.
First is whether the assay ran correctly, which can be assessed via the inclusion of an assay control sample on every single plate.
For the breakfast porridge, no significant difference in preference of test samples among both mothers and children between samples was observed, although the control sample (not containing any chicken powder) had the highest average score.
The samples containing chia had significantly increased levels of proteins, lipids, ash and dietary fiber in the final product, compared with the control sample.
For control sample, the yellowness develops quickly in the first 400 h, but then at 600 h the color changes to light yellow.
After 48 h from the beginning of the experiment, chemical substances were added into all samples, except for the control sample.
For instance, soil covered by fabric contained only 84 percent of the carbon that the control sample contained, and the soil protected by the polypropylene material contained only 80 percent as much of the carbon as the control sample.
6% drier than that of the control sample, respectively.
We also compare the earnings management behavior of bankrupt firms to an industry matched control sample.
The cure exotherm extends from approximately 170[degrees]C to 230[degrees]C in the control sample.
The RT-PCR of the RNA sample resulted in amplicons of the correct size (249 bp), as did the positive control sample, CVS strain rabies virus.
The trial comprised of 86 cancer patients: 55 with lung cancer and 31 with breast cancer, and a control sample of 83 healthy people.