Production Quality Control. 2024, Marth

Т.V. Zimina

Requirements for the management system according to GOST ISO/IEC 17025–2019 and the organization of the activities in testing laboratories

The article analyzes the legislation of the Russian Federation in the field of accreditation in the national accreditation system. The main changes concerning both accredited persons and applicants are considered. Practical tips are given that allow you to pass the confirmation of the competence of the laboratory.

KEYWORDS: Accreditation, confirmation of competence, Federal law, Government Decree, public services, self-examination questionnaire

A.S. Tsvetkov, S.A. Byimova, Yu.N. Burvikova, A.A. Firer

Water quality control in vending machines

It has been suggested and verified that the existing procedure for quality control of drinking water sold through vending machines is imperfect. Based on the microbiological analysis of drinking water samples from water cannons, an integral indicator of its quality was determined. It is shown that there is a high probability of gastrointestinal tract diseases with regular use of such drinking water.

KEYWORDS: vending machine, microorganisms, microbiological analysis, quality, disease, control, potential danger

S.A. Khurshudyan

New direction in automation of testing laboratories (centers)

Automation of processes, running in parallel with the development of IT technologies, covers all new areas of application, replacing humans in production and increasing the productivity of scientific research. The sharp increase in the volume of output, which automation of production processes contributed to a certain extent, led to an increase in the load on testing laboratories (centers), which determines the need for further automation of the quality control and product safety process.

KEYWORDS: authenticity, testing algorithm, testing laboratory (center), laboratory information management system, identification, quality markers

R.G. Kazhlaev, T.P. Plutagar, V.A. Kopytov, I.S. Maidanov, I.V. Gadolina

Quality control of composite samples during static and fatigue tests

The authors present a methodology aimed at studying the quality of products made of polymer composite materials (PCM). This technique combines destructive and non-destructive control methods and methods related to non-destructive conditionally to solve the problem of clarifying the equation of the fatigue curve in order to approach in the future the directional regulation of the properties of composites by controlling the quality of their production. The study established correlations between non-destructive and destructive strength control methods.

KEYWORDS: composite material, material fatigue, industrial tomography, strain distribution, speckle interferometry

I.V. Ivanov, E.A. Berseneva, I.A. Vorobyeva, M.B. Nikitina, N.E. Cherepakhina

Barrier index — indicator of a material’s ability to resist the penetration of bacteria through it — and a possible method for calculating it

In the recently introduced GOST R ISO 22610-2022, presented as identical to ISO 22610:2018, instead of one of the qualitative indicators regulated by the latter, the “barrier index”, the “penetration percentage” appears, with a slightly different calculation method. The article shows the difference between methods for assessing the permeability of tissues of medical devices by microorganisms in humid conditions and methods for calculating this indicator.

KEYWORDS: medical devices, test procedure, microbial permeability of tissues, barrier index, penetration percentage

S.K. Dedushenko,

Replacing acetic anhydride in non-aqueous titration with perchloric acid

Strict restrictions on the turnover of acetic anhydride are an obstacle to conducting analyses according to GOST. However, in some cases, acetic acid anhydride can be replaced with propionic acid anhydride, which is demonstrated by the example of preparing a titrant for determining the base number according to GOST ISO 3771-2013 (GOST 30050, ASTM D2896). The expediency of replacing the volumetric method of preparing solutions with a weight method is shown.

KEYWORDS: petroleum products, oils and additives, non-aqueous titration, acetic acid anhydride, perchloric acid, glacial acetic acid, alkaline number, Karl Fischer titration, preparation of solutions by weight method

E.S. Nasarova

Activity of carbon dioxide extracts in apple juice

The component composition of carbon dioxide extracts from plant raw materials was studied and the possibility of their use to improve the quality indicators of apple juice was assessed. The characteristics of the overall quality of the juice were determined using chemical analysis methods. For a comparative assessment of the component composition of the extracts, the determination of substances containing nitrogen that reacted with a solution of potassium permanganate and the total content of esters was carried out.

KEYWORDS: phytonutrient extract, juice products, stability, transparency, analysis

O.A. Yakunina

Methodological approach to assessing the indicator “percentage of products delivered from its first presentation to the technical control department”. Part 2

The second part of the article examines the materials of inspections of the practice of accounting for the indicator “percentage of delivery of products from the first presentation by the quality control department” at enterprises. A methodology for using the personnel labor quality indicator “percentage of delivery of products from the first presentation of the quality control department” in management as a basis for increasing the effectiveness of the enterprise’s technological systems is proposed.

KEYWORDS: technological systems, defense products, percentage of delivery of products from the first presentation, Student’s criterion, quality management, Pareto method, technical control department

A.A. Begunov, I.A. Friedman

Metrological fundamentals of food production: personnel training

Solving the problems of improving the quality, increasing the quantity and expanding the range of products of domestic production, quality control of imported raw materials and finished products, environmental impact, etc. It largely depends on the state of metrological support for the development and production of products at enterprises. The article outlines the principles of training metrological personnel for the food and other technological industries in conjunction with the characteristics of the industries themselves.

KEYWORDS: metrology, food production, quality, measurement, operator, training, technological process, uncertainty

E.I. Khunuzidi, V.Yu. Smelov, V.L. Shper,

Chebyshev’s inequality and data-driven audit

This paper shows how Chebyshev’s inequality and its extension can be used to obtain objective estimates of the production quality level. The simplest algorithm for applying the described approach is given and the key problem of its real implementation in practice is briefly outlined.

KEYWORDS: Chebyshev’s inequality, audit, theory of variability