Calibration Studies

The PVFj gauge has been calibrated up to 4 GPa (Bauer, 1984) for both shock loading and release. Graham and Lee (1986) have extended these calibration studies to about 20 GPa, and have measured both a shock loading and release profile in sapphire at 12 GPa, as indicated in Fig. 3.15. 

E. Universal Calibration Studies. The use of SEC-[n] and MW calibration using broad MWD standards will make it easier to study the accuracy of the universal calibration concept. By combining the D1/D2 and Ei/E2 calibration curves, the universal calibration (M[n]t can be generated directly as in equation 17. 

En numbers are used when the assigned value has been produced by a reference laboratory, which has provided an estimate of the expanded uncertainty. This scoring method also requires a valid estimate of the expanded uncertainty for each participant s result. A score of En < 1 is considered satisfactory. The acceptability criterion is different from that used for z-, z - or zeta-scores as En numbers are calculated using expanded uncertainties. However, the En number is equal to zeta/2 if a coverage factor of 2 is used to calculate the expanded uncertainties (see Chapter 6, Section 6.3.6). En numbers are not normally used by proficiency testing scheme providers but are often used in calibration studies. 

Hein, A., Tsolakidou, A., Iliopoulos, I., et al. (2002). Standardisation of elemental analytical techniques applied to provenance studies of archaeological ceramics an inter laboratory calibration study. Analyst 127 542-553. 

J. M. L. Martin, T. J. Lee. The Atomization Energy and Proton Affinity ofNH- An Ab Initio Calibration Study. Chem. Phys. Lett. 1996, 258, 136-143. 

A selection of published Rs values is shown as a function of log Kow in Figure 3.5. Only data from calibration studies conducted at 15 4 °C were considered, in order to eliminate the temperature effect as much as possible. When... 

B. J. Tenge, F-Test Significance in Near Infrared Calibration and Near Infrared and Mid Infrared Characterization and Calibration Studies of Matrix-Immobilized and Matrix Dispersed Compounds Bearing Amide Groups, Ph.D. Dissertation, University of Washington, Seattle, WA, 1989-... 

The infralaboratory calibration study was performed by the Institute for Environmental Studies. Sediment was extracted and cleaned up as indicated here. The determination of dioxin and/or dioxin-like content was according to the method indicated under the section DR CALUX analysis. For the intralaboratory study, the following parameters were investigated limit of detection (LOD), limit of quantitation (LOQ), and reproducibility and repeatability of the bioassay. 

The results of the multiple analysis of the standard 2,3,7,8-TCDD calibration curves are also be used to determine the per-participant LOD and LOQ taking into account interlaboratory variation (Table 3). This results show that on average, the partieipants of the calibration study meet the set LOD and LOQ derived from the intralaboratory study. 

TCDD calibration curves. From these data, a per-participant LQD and LQQ could be determined. Qn average, the participants of the calibration study met the set LQD and LQQ derived from the intralaboratory study. Furthermore, analysis of variance indicated that no significant differences in LOD between laboratories could be identified. 

Baranski JV, Pigeau RA, Angus RG. On the ability to self-monitor cognitive performance during sleep deprivation A calibration study. J Sleep Res 1994 3 36 44. 

J. M. L. Martin, in Computational Thermochemistry, K. K. Irikura and D. J. Frurip, Eds., ACS Symposium Series 677, American Chemical Society, Washington, DC, 1998, pp. 212-236. Calibration Study of Atomization Energies of Small Polyatomics. 

Nearly all culture calibration studies predict higher growth temperatures for the same unsaturation index than postulated by the Prahl et al. (1988) regression, although several (Conte et al. (1998a) and G. oceanica cultures of Sawada et al. 

Detailed soil gas geochemical surveys were conducted for calibration purposes over two fields, Filo Morado and Loma de La Lata, in the Neuquen Basin in Argentina. These two fields were chosen for this calibration study because of their differences in both reservoir composition and entrapment mechanisms. 

Accuracy in MS depends on calibration of the mlz axis of the spectra. Calibration is typically performed using separate samples or solutions of the calibrant studied under identical instrumental conditions as the analyte. Calibrants are selected based on the ionization technique and the mlz range required for the analyte typical calibrants used for soft ionization methods with biomolecules include bovine trypsin fragments, bovine insulin (5734 Da), cytochrome c (12,361 Da), horse myoglobin (16,951 Da), lysozyme (14,317 Da), and propylene glycols. Separate solutions of the analyte prepared in the absence and presence of a calibrant species may also be used. Table 15.6 shows typical calibration peaks found with bovine trypsin autolysis fragments.15... 

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