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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Control samples consisting of duplicates, standards, and blanks were inserted into the sample stream at a ratio of 1 control sample per every 10 samples.
Moisture content: Moisture in control sample reduced gradually from 97 to 90.7 g100g-1after two weeks.
Nine experiments were conducted, including one with distilled water, which served as the control sample. The water samples were created by doping distilled water with the contaminants.
More specifically, we extract the function codes per 1 minute to form the function code sequences, and by using the feature calculation and construction algorithm we win a total of 75 function control samples. Because 4 function codes exist in the simulated technological process, each function control sample contains 20 feature variables.
C24: control sample stored at 0-4[degrees]C in air conditions for 24 h; C48: control sample stored at 0- 4[degrees]C for 48 h; AL24: test sample after 24 h alkaline marinating; AL48: test sample after 48 h alkaline marinating; AC24: test sample after 24 h acid marinating; AC48: test sample after 48 h acid marinating; WO24: test sample after 24 h water-oil marinating; WO48: test sample after 48 h water-oil marinating; BS24: test sample after 24 h brine soaking; BS48: test sample after 48 h brine soaking.
The control sample radius is within 3 miles of demolition.
The research included a number of 40 subjects aged between 64 and 72 years, divided into two groups: the experimental sample (n=20) which received a kinesitherapy program and the control sample (n=20) which carried out its day-to-day routine, refusing to participate in the programs carried out within the facility.
And these samples were evaluated sensory evaluation through students from where (taste, color, flavour, texture, pore and overall acceptability) compared to the control sample"non supplemented".
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.
Neat rHDPE/rPET blend was made as control sample. RH was dried for 24 h at 100[degrees]C; r-matrix compounded with 40, 50, 60, 70 and 80 wt% RH based on total composite weight.
The gravy was prepared from tomatoes, peppers, onions, salt, vegetable oil and containing no CP (control sample), 15% CP, 20% CP and 25% CP.