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Type: 
Journal
Description: 
Six Italian non-accredited laboratories participated to an interlaboratory study aimed at measuring Differential Pressure (DP) and Bacterial Filtration Efficiency (BFE) of three face-mask models using methods in-line with EN 14683 standard. Methodological non-conformities were annotated. Repeatability and reproducibility on quintuplicate samples were calculated according to ISO 5725-2. Sample stability was also assessed. Laboratories were ranked according to the total standard deviation over all samples and proficiency was evaluated using z-score according to ISO 13528.Although some non-conformities were present, performances for the DP measurements were always acceptable. One laboratory had to revise the bacterial suspension preparation for the BFE test. Overall, non-accredited laboratories working during pandemic emergency performed satisfactorily.Sample-to-sample variability impacted …
Publisher: 
Elsevier
Publication date: 
25 Nov 2021
Authors: 

Francesco Tessarolo, Giandomenico Nollo, Luca Benedetti, Fabrizia Helfer, Luigi Rovati, Alberto Ferrari, Giulio Marchetti, Federico Reverberi, Salvo Baglio, Nunzio Tuccitto, Stefania Stefani, Stefano Stracquadanio, Filippo Caraci, Antonio Terrasi, Alessia Tricomi, Mario Musumeci, Andrea Miraglia, Giacomo Cuttone, Sofia Cosentino, Luca Agostino Vitali, Dezemona Petrelli, Sonia Ilaria Ciancia, Marina Mingoia, Paolo Castellini, Serena Simoni, Luigi Montalto, Alessia Baleani, Paolo Chiariotti, Nicola Paone

Biblio References: 
Pages: 110481
Origin: 
Measurement