duplicate measurement

duplicate measurement

[¦düp·lə·kət ′mezh·ər·mənt]
(analytical chemistry)
An additional measurement made on the same (identical) sample of material to evaluate the variance in the measurement.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, when we compared the means (SD) of the lowest results for each duplicate measurement between the tests with and without the predilution step [no predilution, 388 (144) U/L; with predilution, 326 (111) U/L; n = 208], the lower values for the test with the predilution step were striking (Fig.
Specimens were then stored at room temperature for 5 h, followed by storage up to 48 h at 4 [degrees]C to measure NT-proBNP concentrations at 24 and 48 h (duplicate measurement of each specimen).
The measurements were performed as a single measurement, except on day 0 (duplicate measurements).
3 Paired difference 0.15 [+ or -] 0.16 0.18 [+ or -] 0.21 Table 2: SUV and SUL: CV and ICC from duplicate measurements superior to, inferior to, and at the level of the portal vein and in the left lobe of the liver.
No statistical difference was observed in bias of the duplicate measurements at the two VCT sites.
The assay utilizes a polyclonal antibody sandwich assay to detect mouse sclerostin and requires 25 [micro]l of sample (serum or plasma) for duplicate measurements. The lower level of detection of the assay is 17.4 pg/mL with a calibrated range of 37.5-1200 pg/mL.
The duplicate measurements, along with the preceding study, confirm that this variability is a true artefact of the material and indicate chip-to-chip molecular weight variation within the batch.
Initially, Levey and Jennings averaged duplicate measurements of their control to set the mean and range.
The research team obtained duplicate measurements one to two weeks apart from 33 study participants to make sure the results could be replicated over time.
Precision or variability of measurements conducted under identical conditions can be obtained by duplicate measurements (Yoshizumi, 1999).