Sentence examples for as a primary standard from inspiring English sources

Often a gas chromatographic mass spectrometric (GC MS) quantitative assay is developed and used as a primary standard for evaluation of less expensive assay methods.

These results are discussed in the light of previous contentious reports about the use of H2 gas on Pt as a primary standard electrode for work with liquid ammonia solutions.

In 2011 a decision was made by Czech Metrology Institute to build a free-air ionization chamber (FAC) intended to be used as a primary standard of air kerma rate for low-energy X-rays (photon energy below 50 keV, including mammography X-ray qualities) in order to replace the currently used secondary ionization chamber and to decrease the uncertainty of air kerma reference value.

Azeotropic or "constant-boiling" hydrochloric acid (roughly 20.2%) can be used as a primary standard in quantitative analysis, although its exact concentration depends on the atmospheric pressure when it is prepared.

Measurement of hepatic venous pressure gradient (HVPG) is established as a primary standard for evaluation of portal vein pressure, particularly in patients with hepatic (sinusoidal) portal hypertension.

The WHO classification system for endometrial hyperplasia, still regarded and used as a gold standard, was used as a primary criterion for tissue selection.

Over the past 10 years, water calorimetry has been adopted widely by national metrology institutes as a primary reference standard for measuring absorbed dose to water in clinical radiotherapy beams.

PTB will use the MLS as a dedicated facility for radiometry and photon metrology in the UV and VUV range and as a primary source standard in the VIS/UV and VUV.

To replace the interpolation techniques between air-kerma calibration coefficients of an ionization chamber for Ir [ 5, 6], the Institute of Nuclear Energy Research INERR, Taiwan) has recently developed a spherical graphite-walled cavity ionization chamber as the primary standard for direct measurement of HDR Ir brachytherapy source strength to provide a traceable source calibration.

Despite this gradual reemergence of Frisian, Dutch still functions as the primary standard language of Friesland.

An O3 photometer is used as the primary standard, and traceability is ensured through instrument comparisons (Tanimoto et al. 2007).