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Internal audit techniques for testing laboratories: ISO/IEC 17025:2017 perspective Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-16 Han-Min Ohn
Internal auditing is an important part of the ISO/IEC 17025:2017 standard. Clause 8.8 of the ISO/IEC 17025:2017 standard describes the requirements that the testing and calibration laboratories need to follow in the area of internal auditing. However, the standard does not describe which technique to use when conducting internal audits and the ISO 19011:2018 standard (Guidelines for Auditing Management
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Measurement uncertainty in testing of biologicals in national control laboratories for ISO/IEC 17025: practical approaches Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-14 Shalini Tewari, Niharika Trivedi, Sanchi Goel, Rashmi Shrivastava, Sudha V. Gopinath, Ayushi Khurana, Anupkumar R. Anvikar
The challenges in estimating measurement uncertainty in the complex matrix of biological systems, while doing compliance testing by National Control Laboratories and its importance in meeting ISO/IEC 17025 requirements are emphasised. Two primary approaches for MU, the bottom-up and top-down approaches, are discussed. Highlighting the significance of accurate estimations in NCLs, it advocates the use
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Proficiency testing in analytical chemistry, microbiology and laboratory medicine: discussions on current practice and future directions Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-12 Brian Brookman, Csilla Bélavári, Owen Butler, Raquel Múrtula Corbí, Monika Horsky, Heather Jordan, Caroline Laurent, Marina Patriarca, Ulla Tiikkainen, Kees van Putten, Piotr Robouch, Erika Sárkány, Angela Sorbo
A summary of the working group discussions on proficiency testing (PT) and external quality assessment (EQA) held at the Eurachem proficiency testing Workshop, Windsor, during September 2023 is provided. The working groups covered a range of issues concerned with current practice and future directions: the revision of ISO/IEC 17043; guidance on different methods for setting the standard deviation for
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Comparison of continuous flow analysis and ion chromatography for determinations of nitrate, nitrite and phosphate ions in seawater and development of related seawater certified reference materials Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-10 Chikako Cheong, Toshihiro Suzuki, Tsutomu Miura, Akiharu Hioki
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A comparison of proficiency testing evaluation criteria approaches for fitness-for-purpose Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-09 Kelly Black, Polona Carson, Emmie Jenkins
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(K)ILO project: proficiency tests for students Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-04-07 Kees van Putten, Esther Peters-Grutters, Martijn Heuven
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Improved coverage factors for expanded measurement uncertainty calculated from two estimated variance components Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-27 Peter D. Rostron, Tom Fearn, Michael H. Ramsey
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Quality control charts for short or long runs without a training phase. Part 1. Performances in state of control and in the presence of outliers Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-27 Manuel Alvarez-Prieto, Ricardo S. Páez-Montero
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Paradox? What paradox? Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-23 R. Willink
This article is a response to the preceding paper by Huang, who considers a recent result of Willink (Measurement: Sensors, 24:100416, 2022) and who describes the result as a paradox. The result implied that a set of information or a “state of knowledge” about a measurand cannot be identified with a unique probability distribution for the measurand, contrary to what seems suggested in the literature
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Information combination and transformation: a paradox and its resolution Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-23 Hening Huang
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A practical two-step procedure for taking into account all available information (prior and current) about influence quantities in measurement uncertainty analysis Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-23 Hening Huang
This paper considers the problem of computing the combined standard uncertainty of an indirect measurement, in which the measurand is related to multiple influence quantities through a measurement model. In practice, there may be prior information or current information, or both, about the influence quantities. We propose a practical two-step procedure for taking into account all available information
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Comparisons of real versus synthetic proficiency testing items Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-22 Finlay MacKenzie, Rachel Marrington
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The comparison of flow rate calibration methods for high-performance liquid chromatography (HPLC) pump Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-15 Prangtip Uthaiwat, Theera Leeudomwong, Tassanai Sanponpute
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Certification of a novel matrix reference material for accurate measurements of aflatoxin M1 in milk powder Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-13 Chun Yuan Huang, Ya Xuan Liu, Jian Zhou, Ming Wang, Meng Rui Yang, Hui Liu, Fukai Li, Liyuan Zhang
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Measurement uncertainty from sampling and its role in validation of measurement procedures Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-03-08 Michael H. Ramsey, Peter D. Rostron
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Accreditation of medical laboratories: What is new in ISO 15189:2022 Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-21
Abstract In this paper, the main changes in ISO 15189:2022 in comparison with the 2012 version are discussed. They affect, directly or indirectly, the actions of medical laboratories towards ensuring validity and accuracy of examination results. A main change refers to the structure that is now aligned with ISO/IEC 17025 and recent editions of other standards in the ISO 17000 series. Further to this
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Ten years of an external quality program control in clinical microbiology: a statistical analysis of the results Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-21 Clara Morales, Martha Uzeta, Mabel Ramírez, Ramón Giraldo
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S-score: a new score for binary qualitative proficiency testing schemes interpretable as the z-score Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-18 Christian Baudry, Gaëlle Jadé, Paul Rayneau, Bertrand Lombard, Max Feinberg, Michel Laurentie
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Investigation of the effect of antioxidant-added skin care creams on UV-B-induced oxidation in skin simulation environment by spectroscopic and chromatographic analyses Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-12 Temel Kan Bakır, Hüseyin Kastrati
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Insights on the validation of alternative tools for water quality monitoring: the case of on-site test kits, portable devices and continuous measuring devices Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-08 Nathalie Guigues, Emrah Uysal, Sandrine Raveau, Jérémie Magar, Gabriel Billon, Joonas Kahiluoto, Rudolf J. Schneider, Lokman Liv, Serap Gençtürk Tosun, Gaëlle Canteau, Béatrice Lalere
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Measurement uncertainty of blood alcohol concentration (BAC) by headspace gas chromatography: comparison of different strategies Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-06
Abstract Analysis of blood alcohol concentration (BAC) is a routine analysis performed in many forensic laboratories. As BAC results are usually contested in court, measurement uncertainty (MU) becomes a critical topic. This contribution reports the results of an investigation of the major sources of uncertainty affecting BAC determinations and compares two different approaches to the quantification
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Use of the Monte Carlo method for the estimation of measurement uncertainty in chemical analysis systems with intensive mathematical treatment Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-05
Abstract In recent years, the scientific community has made great efforts to establish procedures for the estimation of uncertainty in various measurement processes in laboratories. In this regard, the Guide to the Expression of Uncertainty in Measurement has been one of the most widely used documents for the estimation of uncertainty values in measurement processes. In spite of its success, the linear
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Residue behavior and consumer risk assessment of combination product of betacyfluthrin and imidacloprid on cucumber (Cucumis sativus L.) Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-02-02 Sakshi Sharma, Jatiender Kumar Dubey, Sapna Katna, Ajay Sharma, Deepika Shandil, Pankaj Sharma, Nisha Devi, Arvind Kumar, Shubhra Singh, Nimisha Thakur
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Comparative analysis of the skin surface lipids between acne patients and controls using UFLC method Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-01-23 M. S. Walia, R. Vinutha, V. Shastry, J. Betkerur, B. M. Gurupadayya, H. Konala
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Systematic study on the variability in the gasoline sampling process at service stations and its contribution to the measurement variance Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-01-22 Jerson González-Hernández, Paola Fuentes-Schweizer
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Development of UME CRM 1008: certified reference material for C-reactive protein Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-01-12 Merve Oztug, Evren Saban, Meltem Asicioglu, Alper Isleyen, Muslum Akgoz
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Introduction and reflection on the revision of ISO/IEC 17043 Accredit. Qual. Assur. (IF 0.9) Pub Date : 2024-01-09 Sun Biyao, Tang Lingtian, He Ping
In May, 2023, the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) published the international standard ISO/IEC 17043:2023 Conformity assessment—General requirements for the competence of proficiency testing providers. This article describes the 100 % online revision process from the perspective of the Working Group (WG) members, explains
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Quantification of antibiotics in imported and local broiler chickens using MS/Q-TOF: a study from Muscat Governorate Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-12-19 Sara Ali Al Fazari, Ahmed Abusham, Salem Said Jaroof Al-Touby, Waleed Khalid Hilal Al Rajhi, Yahya Bin Abdullah Alrashdi, Mohammad Amzad Hossain
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Simultaneous equation method for the estimation of gallic acid and apigenin by UV–visible spectrophotometry Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-12-15 Shweta Mevada, Harsha Patel, Saurabh Shukla
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Need for a protocol for performance evaluation of the gas analyzers used in biomethane conformity assessment Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-12-12 Karine Arrhenius, Lucy Culleton, Javis Nwaboh, Jianrong Li
Biomethane may contain trace components that can have adverse effects on gas vehicles performances and on the pipelines when injected in the gas grid. Biomethane quality assurance against specifications is therefore crucial for the integrity of the end-users’ appliances. Analytical methods used to assess biomethane conformity assessment must be validated properly and possibly, new methods specifically
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Development of new metrology methods for determining major elements in solid biofuels ash and establishment of results’ traceability Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-12-03 Katarina Hafner-Vuk, Dijana Ćorić, Milica Krajišnik
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Development of Certified Reference Materials of Trace Elements in Gold Solution (GBW02797–GBW02800) Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-11-16 Jianying Zhang, Yanjie Cui, Tao Zhou, Jinzhuan Wang, Zanfang Zhu, Fangmei Liu, Guangyang Xiao, Jing Yu, Xinlei Wang, Boling Huang, Chun Li, Xingjiao Huang
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Estimation of uncertainty from duplicate measurements: new quantification procedure in the case of concentration-dependent precision Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-10-31 Václav Synek, Sylvie Kříženecká
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Development of benzene, toluene, ethyl benzene, m-xylene, p-xylene and o-xylene (BTEX) gas reference standards for air pollution monitoring in South Africa Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-09-25 Napo Ntsasa, James Tshilongo, Nompumelelo Leshabane, Mudalo Jozela, Goitsemang Lekoto, Patricia Forbes
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Improvement of the quality of analytical results generated by GC/MS method for characterization of Helichrysum italicum (Roth) G. Don essential oil Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-09-19 Katarina Hafner-Vuk, Vladimir Milojević, Monia Avdić, Jasmin Kevrić, Milica Krajišnik
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A case study for in-house method validation of gas chromatography technique using class-1 calibration gas mixtures for greenhouse gases monitoring Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-09-15 Komal, Daya Soni, Shankar G. Aggarwal
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Certification and long-term stability of bromate ion standard solution Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-09-19 Toshiaki Asakai
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Quantitative 1H NMR methodology for purity assay with high accuracy Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-09-13 Tongtong Wang, Quanhui Liu, Min Wang, Jian Zhou, Mengrui Yang
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The principles of good laboratory practices in biotechnology: multicriteria decision aid (MCDA) as an innovative model for transferring knowledge Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-07-24 Elisa Rosa dos Santos, Evaldo Cesar Cavalcante Rodrigues, José Mauro Granjeiro
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Assessment of liquids homogeneity in storage tanks in the oil industry through the comparison of uncertainties Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-07-11 Elcio Cruz de Oliveira
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RP-HPLC-DAD method development and validation of L-lysine hydrochloride: application to bulk drug substance and multivitamin oral suspension Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-07-09 P. R. Hemanth Vikram, Narasimha M. Beeraka, Hitesh B. Patel, Pramod Kumar
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An empirical examination of ISO 9001’s influence on sustained success of companies Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-07-09 M Chukri Idris, Alptekin DURMUŞOĞLU
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Study of the shutting effect of a liquid thermostat during measurements using a two-electrode electrolytic cell Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-06-29 D. V. Meleshchuk
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Proficiency testing interpretation based on analysis of variance method Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-06-29 Luiz Henrique da Conceição Leal, Marcelo Lima Alves, Werickson Fortunato de Carvalho Rocha
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Identifying risk management challenges in laboratories Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-05-12 Evdoxia Tziakou, Argyro G. Fragkaki, Agapios Ν. Platis
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The conception and initial years of a quality management system based on ISO/IEC 17025: an action research Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-05-11 Laura Neves de Jesus, Ricardo Batista Penteado, Fernando Costa Malheiros, Lucio Abimael Medrano Castillo, Luís Fernando Magnanini de Almeida
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From VIM3 toward the next edition of the International Vocabulary of Metrology Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-04-19 Franco Pavese
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Design and implementation of electronic reference material document system Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-04-17 Wang Bin, Ma Liandi, Lu Xiaohua
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Evaluation of the 1R6F certified reference cigarette for proficiency testing of mainstream smoke parameters Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-03-13 Stacey Slone, C. Ruth McNees, Matt Craft, Huihua Ji, Andrew Shearer, Brent Shelton, Ling Yuan, Orlando Chambers
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Paul De Bievre down under: practical metrology in chemistry and its principles Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-03-04 Gary Price
Paul De Bievre interacted with the Australian national measurement system in the 1990s as it developed its chemical measurement system infrastructure. It was a fruitful and stimulating time when practical measurement—weights and measures in its modern forms—mixed with the ideas of metrology in chemistry. Among the issues discussed were accreditation, a new journal called accreditation and quality assurance
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Laboratory glassware cleaning validation in pharmaceutical industry: a case study Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-02-06 Linda Belgacem, Redouane Amine Cherif
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On the optimal use of silver–silver chloride reference electrodes Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-02-07 Igor Maksimov, Toshiaki Asakai, Masaki Ohata
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Development of certified reference materials of ethanol in aqueous solution resulting from the participation of GUM in EMPIR 16RPT02 ALCOREF project Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-01-27 Piotr Janko, Ewa Malejczyk, Michał Nawotka
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Establishment of Cryptococcus neoformans and C. gattii as certified reference materials according to the requirements of ISO 17034:2016 Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-01-24 Aline da Silva Soares Souto, Carlos Roberto Sobrinho do Nascimento, Carla de Oliveira Rosas, Marilia Martins Nishikawa, Maria Helena Simões Villas Bôas, Manuela da Silva
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Indonesian proficiency testing for electrolytic conductivity measurement of synthetic wastewater: a comparison of performance evaluation based on four standardized performance statistics Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-01-18 Fransiska Sri Herwahyu Krismastuti, Nuryatini Hamim, Ayu Hindayani
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Some pitfalls in the uncertainty evaluation of isotope delta reference materials Accredit. Qual. Assur. (IF 0.9) Pub Date : 2023-01-11 Manfred Gröning
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On testing of the homogeneity of variances for two-side power distribution family Accredit. Qual. Assur. (IF 0.9) Pub Date : 2022-12-13 A. V. Stepanov, A. G. Chunovkina
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Complying with the resource requirements of ISO/IEC 17025:2017 in Indonesian calibration and testing laboratories: current challenges and future directions Accredit. Qual. Assur. (IF 0.9) Pub Date : 2022-10-19 Fransiska Sri Herwahyu Krismastuti, Muhammad Haekal Habibie
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The units of rate constants in chemical kinetics Accredit. Qual. Assur. (IF 0.9) Pub Date : 2022-10-11 Jeremy Frey, Timothy J. Wallington, Richard Hartshorn, Martin Quack, Pascal Heus, Steven Emmerson
This short article discusses the units of rate constants as used in chemical kinetics and, in particular, the aspect of non-integral powers of base units, which some might find unusual for units in the SI system. In many ways the fact that the units of the rate constants as usually defined convey information about the order of the reaction or reactions involved is very useful, but in other ways having
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Development of a certified reference material for benzo[a]pyrene and benz[a]anthracene in olive oil Accredit. Qual. Assur. (IF 0.9) Pub Date : 2022-09-30 Ting Lu, Ee Mei Gui, Juan Wang, Pui Sze Cheow, Tang Lin Teo, Tong Kooi Lee