Development of certified reference materials of ethanol in aqueous solution resulting from the participation of GUM in EMPIR 16RPT02 ALCOREF project

IF 0.8 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Accreditation and Quality Assurance Pub Date : 2023-01-27 DOI:10.1007/s00769-022-01529-4

Piotr Janko, Ewa Malejczyk, Michał Nawotka

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Abstract

The measurement of alcohol concentration in exhaled air is used worldwide for sobriety checks by police and other services. Breath alcohol analyzers are instruments for the determination of alcohol (ethanol) mass concentration in exhaled air. These instruments are evaluated and calibrated in many countries (among others in Poland) using wet gas standards produced in situ from aqueous standard solutions in breath simulators. The value of the mass fraction of ethanol in the solution is necessary to determine the concentration of ethanol in the produced gas standard. New reference materials of ethanol in an aqueous solution intended for use in breath simulators for calibration and testing of breath alcohol analyzers were developed as a result of the Central Office of Measures (GUM) participation in the EMPIR 16RPT02 ALCOREF project. CRMs were certified following standard ISO 17034:2016 and ISO Guide 35:2017 ensuring traceability of certified values to SI units and covering ethanol content ranging from 0.129 g/kg to 5.051 g/kg required by OIML R126. The certified mass fractions of the ethanol and expanded uncertainties (k = 2) of the four reference materials representative for the entire range were (0.2588 ± 0.00040) g/kg (GUM 12.2), (0.6470 ± 0.00074) g/kg (GUM 12.3), (1.0352 ± 0.0014) g/kg (GUM 12.4) and (5.0506 ± 0.0092) g/kg (GUM 12.8). The CRMs produced by the procedure presented in this paper have been found to be fit for purpose.

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GUM参与了EMPIR 16RPT02 ALCOREF项目，开发了水溶液中乙醇的标准物质

测量呼出空气中的酒精浓度在世界范围内被警察和其他部门用于清醒检查。呼气酒精分析仪是测定呼出空气中酒精(乙醇)质量浓度的仪器。在许多国家(其中包括波兰)，使用呼吸模拟器中的水标准溶液原位产生的湿气标准对这些仪器进行评估和校准。溶液中乙醇的质量分数的值对于确定产生的标准气体中乙醇的浓度是必要的。作为中央措施办公室(GUM)参与EMPIR 16RPT02 ALCOREF项目的结果，开发了用于呼气模拟器校准和测试呼气酒精分析仪的水溶液中乙醇的新标准物质。crm按照ISO 17034:2016和ISO指南35:17标准进行认证，确保认证值可追溯至SI单位，并涵盖OIML R126要求的0.129 g/kg至5.051 g/kg的乙醇含量。代表整个范围的四种标准物质的乙醇质量分数和扩展不确定度(k = 2)分别为(0.2588±0.00040)g/kg (GUM 12.2)、(0.6470±0.00074)g/kg (GUM 12.3)、(1.0352±0.0014)g/kg (GUM 12.4)和(5.0506±0.0092)g/kg (GUM 12.8)。本文中提出的程序所产生的crm已被发现适合于目的。

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来源期刊

Accreditation and Quality Assurance 工程技术-分析化学

CiteScore

1.80

自引率

22.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Accreditation and Quality Assurance has established itself as the leading information and discussion forum for all aspects relevant to quality, transparency and reliability of measurement results in chemical and biological sciences. The journal serves the information needs of researchers, practitioners and decision makers dealing with quality assurance and quality management, including the development and application of metrological principles and concepts such as traceability or measurement uncertainty in the following fields: environment, nutrition, consumer protection, geology, metallurgy, pharmacy, forensics, clinical chemistry and laboratory medicine, and microbiology.