The feature sizes of only a few nanometers in modern nanotechnology and next-generation microelectronics continually increase the demand for suitable nanometrology tools. Grazing incidence small-angle X-ray scattering (GISAXS) is a versatile technique to measure lateral and vertical sizes in the nm-range, but the traceability of the obtained parameters, which is a prerequisite for any metrologi...

− Density measurements are frequently associated to specific requirements in order to evaluate the quality of a process or to determine mass and/or volume of the material. Certified reference liquids can be used to assure metrological traceability of density measurements to the International System of Units (SI) with uncertainty lower than 0.005 %. This paper presents the new approach of the It...

The production of certified reference materials in Brazil, and the consequent availability to national end users, is an important task for the enhancement of Metrology in Chemistry status in the country, as these materials are used for method validation, equipment calibration and for establishing metrological traceability links. In this study, Instrumental Neutron Activation Analysis (INAA) was...

Density measurements are frequently associated to specific requirements in order to evaluate the quality of a process or to determine mass and/or volume of the material. Hydrostatic weighing is the usual method to get directly the traceability to the SI system of the density as well as of the solid volume. INRIM (the former CNR IMGC) supplied to IPQ a hydrostatic apparatus with a measuring cell...

BACKGROUND Commutable reference materials (RMs) are suitable for end-users for evaluating the metrological traceability of values obtained using routine measurement systems. We assessed the performance of 6 routine measurement systems with validated secondary RMs. METHODS We tested the homogeneity, stability, and commutability of 5 minimally processed human serum pools according to the standa...

BACKGROUND The CDC's Lipid Standardization Program established the chromotropic acid (CA) reference measurement procedure (RMP) as the accuracy base for standardization and metrological traceability for triglyceride testing. The CA RMP has several disadvantages, including lack of ruggedness. It uses obsolete instrumentation and hazardous reagents. To overcome these problems the CDC developed an...

The central importance of HbA 1c in monitoring glycaemic control was highlighted by the Diabetes Control and Complications Trial (DCCT) which showed that improved glycaemic control, as monitored by HbA 1c , delayed the onset of diabetic complications. Following this publication the issue of international standardisation of glycated haemoglobin (GHb) measurements became an important objective. T...

Improving food safety, reducing the impacts of food safety problems, and providing a means to verify food quality attributes are driving the development of traceability initiatives in agri-food systems. Numerous and varied examples exist, from regulatory traceability initiatives, to industry-wide livestock traceability programmes, to individual supply-chain systems that combine traceability wit...

Software traceability is the ability to relate artefacts created during the life cycle of software development. Traceability is fundamental to support several activities of the software development process such as impact analysis, software maintenance and evolution, verification and validation. Despite the importance and advances in the software traceability area, traceability practice is still...

I should like to bring to the attention of the many readers of the Journal of Research of the National Institute of Standards and Technology the establishment of the Slovak Metrological Society (SMS). SMS came into being on October 16, 1990, as the result of a special founding Congress held in DT Zilina with 137 delegates from the whole of Slovakia in attendance. It brings together individuals ...