Authors: E.A. Nikolaeva, A.V. Nikolaev

Title of the article: Assessment of uncertainty of measurement results during product testing

Year: 2025, Issue: 6, Pages: 29-36

Branch of knowledge: 2.5.9. Methods and devices for monitoring and diagnosing materials, products, substances and the natural environment

Index UDK: 006.9

DOI: 10.26730/1999-4125-2025-6-29-36

Abstract: Measurement uncertainty assessment has been an important and relevant topic in recent times. Measurement uncertainty assessment is currently being actively discussed in various fields of measurement and testing. Understanding the uncertainty of test results is essential for laboratories, their customers, and all parties who use and interpret these results in their work or to protect their interests in various courts. When conducting measurements, it is important to consider the uncertainty of the measurements. This is especially important when the results are reported within specified limits. When conducting interlaboratory comparative tests, the comparability of the results can usually be determined by considering the uncertainty of the measurements, in accordance with the requirements of the accreditation criteria. In particular, the following characteristics are calculated: the standard uncertainties of type A and type B, as well as the total and expanded uncertainties, taking into account their weight contributions. This paper discusses the application of the hydrometer method for determining the strength of vodka in accordance with the requirements of GOST 32035-2013, and calculates the metrological characteristics of the measurements, which characterize the accuracy of the measurements. The hydrometer method is a method for determining the strength of vodka based on the measurement of the volume fraction of ethyl alcohol in aqueous-alcohol solutions using an alcohol hydrometer. Based on the results of the studies and calculations conducted in this work, the compliance of the product (in our case, alcoholic products) is assessed using a quantitative indicator that reflects the range of possible values that can be assigned to the measured quantity with a certain probability, thereby determining whether the product meets the established requirements of GOST 32035-2013 or not.

Key words: Metrological characteristics measurement control hydrometric method uncertainty error methodology

Receiving date: 29.09.2025

Approval date: 15.11.2025

Publication date: 22.12.2025

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