Abstract The “purity” of an organic compound typically refers, in practice, to assignment the mass fraction content primary component present material. value calibrator material is ultimate source metrological traceability any quantitative measurement that a given matrix. may consist Certified Reference Material (CRM) whose purity has been assigned by CRM producer or laboratory choose value-ass...

Quantitative nuclear magnetic resonance (qNMR) spectroscopy is employed by an increasing number of analytical and industrial laboratories for the assignment of content and quantitative determination of impurities. Within the last few years, it was demonstrated that (1)H qNMR can be performed with high accuracy leading to measurement uncertainties below 1 % relative. It was even demonstrated tha...

BACKGROUND The Diabetes Control and Complications Trial (DCCT) and United Kingdom Prospective Diabetes Study (UKPDS) established the importance of hemoglobin A(1c) (Hb A(1c)) as a predictor of outcome in patients with diabetes mellitus. In 1994, the American Diabetes Association began recommending specific Hb A(1c) targets, but lack of comparability among assays limited the ability of clinician...

Abstract Quantitative data are generated differently. To justify inferences about real-world phenomena and establish secured knowledge bases, however, quantitative generation must follow transparent principles applied consistently across sciences. Metrological frameworks of physical measurement build on two methodological that transparent, traceable—thus reproducible processes for assigning num...

Using combined AFM (Atomic Force Microscope) and a SEM (Scanning Electron Microscope) makes it possible to accurately measure a nano-object in 3 dimensions. This paper deals with the traceable measurements of the size and the size distribution of a SiO2 sphericalshaped nanoparticle population performed by both microscopy techniques. The complementary nature of AFM and SEM is investigated. The c...

The urgency of development and metrological research reference installations based on high-pressure vessels, which meet the requirements implementation traceability instruments for measuring gas volume flow rate, is considered. operation algorithm specified when transferring unit to meters under consideration studied. Based features PVTt-type standards, a list analysed uncertainties type A form...

Caffeine has traditionally been used to assess and control the metrological characteristics of liquid chromatographs. In recent years, with increasing requirements for traceability measurement results, use caffeine as a reagent verification, calibration, type approval tests started contradict effective regulations governing uniformity. This study aims develop test procedure quantification in vi...

Metrological properties of voltammetric electrodes, in the situation where on their surface an electrochemical reaction of oxidizing/reduction takes place, were analyzed in this chapter. The properties of electrodes on which a reaction controlled by ion transport process takes place were taken into consideration. Also, it was analyzed how the electrode’s shape and the voltage polarizing the ele...

Frequency dissemination in phase-stabilized optical fiber networks for metrological frequency comparisons and precision measurements are promising candidates to overcome the limitations imposed by satellite techniques. However, an architecture shared with telecommunication data traffic, network constraints restrict availability of dedicated channels commonly-used C-band . Here, we demonstrate S...