Standard samples and metrological traceability in chemistry

Conceptual and practical problems of ensuring metrological traceability of substance and material composition measurements based on standard samples are examined.     

Assurance of accuracy in determinations of contents of micro components in samples of very pure substances and in environmental specimens

We propose an approach allowing us to use preliminary enrichment (concentration) in accordance with the characteristic features of the method for taking into account the resulting systematic error based on the relationship between the systematic error of the analysis results and the determined content. This allows us to avoid a number of difficulties specific to quantitative determination of very low contents with substantial improvement in the accuracy of the final analysis result.Translated from Izmeritel'naya Tekhnika, No. 2, pp. 58–60, February, 1995.     

Standard reference materials of high-purity substances for metrological support of analytical monitoring of nanomaterials and their high-purity precursors

We consider aspects involved in preparation of chemical composition standard reference materials (SRMs) for nanomaterials. We show that the primary requirement for metrological support of analytical measurements is the availability of SRMs with certified chemical purity. We describe a procedure for preparation and certification of 40 such SRMs based on the Exhibition Collection of High-Purity Substances of the Russian Academy of Sciences. We describe modern methods for analysis of high-purity substances and nanomaterials based on them. We discuss problems involved in application of SRMs in nanoanalysis.     

Practical interpretation of metrological traceability on gauge block as to VIM 3

In ISO/IEC Guide 99:2007, i.e. the International Vocabulary of Basic and General Terms in Metrology-3rd edition (VIM 3), the term “traceability” is replaced by “metrological traceability”, giving it a new definition as property of a measurement result which can be related to a reference. In essence, “metrological traceability” can offer an evidence of measurands tracing to the primary standards which can realize the SI units, and offer a documented unbroken chain of calibrations, thus considered as one of the most important terms in VIM 3. National Measurement Laboratory (NML, Chinese Taipei) has long operated its main mission of calibration implemented along with peer assessed traceability of its measurement systems, which demonstrate a calibration hierarchy conventionally in schematic approach. In dealing with definition of the new term “metrological traceability” in VIM 3, this paper elaborates in taking additionally a newly mathematical approach rather than schematic approach only to realize the practical interpretation of “metrological traceability” to show how the unbroken calibration chain is functioning seamless and robust on the gauge block measurement system in NML. Through such study activities, we well assure our strong confidence on technology inheritance of gauge block and the other measurement systems with sufficient metrological know-how in NML, which can continually pass to each entry level metrologist.     

Critical amplitudes of pure substances

Consequences of theoretical models for the critical amplitudes A, B, , D are considered and calculated values of critical amplitudes for pure substances are presented for the range Z_cr=p_crv_cr/RT_cr=0.22–0.29, as obtained by the proposed expressions.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 51, No. 6, pp. 994–998, December, 1986.     

On certain potential improvements in the metrological traceability of linear measurements in the nanometric range

A new approach to linear measurements in the nanometric range based on the measurement of the transit time of an electromagnetic wave between two points that bound a linear region is proposed. Frequency methods that make it possible to increase the resolution of linear measurements and improve their traceability in this range are used.     

关于矿泉水与纯净水

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Support from regulations on the development of reference materials for the compositions of pure organic substances

A new approach is proposed to certifying reference materials (RM) for the compositions of pure organic substances, which incorporates the specific features of organic compounds and which meets basic metrological requirements. A program is presented for the metrological certification of such RM. Translated from Izmeritel'naya Tekhnika, No. 11, pp. 62–63, November, 1999.     

Traceability of measurement results at different levels of metrological work

Features are considered of measurement result traceability at different levels of metrological work, that are based on existing international guides, standards and recommendations for metrology.     

Conductometric determination of sulfur in organic substances

A conductometric method is considered for determining sulfur contents in organic substances, in particular in diesel fuel. Ozone is proposed for oxidizing sulfur dioxide.Translated from Izmeritelnaya Tekhnika, No. 9, pp. 19–22, September, 2004.     

尘埃粒子计数器校准结果量值溯源

通过对尘埃粒子计数器校准原理的研究分析,确定了与尘埃粒子计数器校准结果直接相关的量值颗粒尺寸和颗粒数量,并对颗粒尺寸及其颗粒数量的溯源性进行了分析,理顺了量值溯源与传递体系的关系,保证了尘埃粒子计数器校准结果的准确可靠。