The phrase "a primary standard for" is correct and usable in written English.
It can be used when discussing a benchmark or reference point that is considered the most important or fundamental in a particular context.
Example: "The new measurement technique has been established as a primary standard for accuracy in scientific research."
Alternatives: "a key benchmark for" or "a fundamental reference for".
The Obama administration's proposal sets a primary standard for ground-level ozone of no more than 0.060 to 0.070 parts per million, to be phased in over two decades.
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.
Recently, an approach for developing a primary standard for Y-labeled resin microspheres was described [ 92].
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.
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.
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.
At INRIM, a primary standard was designed and realized for the measurement of molar gas flow from 4 × 10−10 mol/s to 2 × 10−7 mol/s with reference to atmospheric pressure.
The wall correction factor could be applied in the establishment of an air-kerma primary standard for HDR Ir brachytherapy sources.
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.
