Dubravka Božić, Biserka Runje, Andrej Razumić
This study presents a novel mathematical model designed to evaluate risks in calibration processes. A probabilistic model was described for estimating the global producers' and consumers' risk with a non-linearized tolerance interval. The measurement uncertainty required to assess the risk for the explanatory variable at a given value of the response variable was calculated from the regression analysis outcome. The model was tested on the example from industrial practice to evaluate the risks associated with calibrating the roundness measurement device within a moderate scale of -3 μm to 3...
IMEKO TC8, TC11 and TC24 Conference
· TC8
· 2025
· 10.21014/tc8-2025.007
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Abigail Grace Bion, Aaron Dacuya, Alleni Junsay, Benilda Ebarvia
Ethoxyquin (EQ), a quinoline-based antioxidant, is widely used in food and animal feed, often leading to residues in animal tissues—raising health concerns. This study developed and validated two quantification methods: liquid chromatography with fluorescence detection (LC-FLD) and isotope dilution tandem mass spectrometry (LC-IDMS/MS). Sample preparation employed the QuEChERS technique with enhanced matrix removal-lipid (dSPE EMR-lipid). The LODs/LOQs were 2.4/3.6 μg/kg (LC-FLD) and 1.7/2.5 μg/kg (LC-IDMS/MS). Both methods showed excellent linearity (R = 0.999) using matrix-matched...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2025
· 10.21014/tc24-2025.006
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Clarissa Manguin, Ian Deniell Magsino, Janesky Esplana, Alleni Junsay
Green mussels (Perna viridis) are an important marine resource in the Philippines, widely farmed for their economic and nutritional value. As filter feeders, they can accumulate heavy metals like cadmium (Cd), mercury (Hg), and lead (Pb), posing potential health risks. This study developed and validated gravimetric external calibration methods to quantify heavy metal levels in mussels from major producing regions using Graphite Furnace - Atomic Absorption Spectrophotometry (GF-AAS) for Cd and Pb, and Direct Mercury Analyzer (DMA) for Hg. Validation showed strong linearity (r > 0.995), with...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2025
· 10.21014/tc24-2025.005
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Alleni Junsay, Clarissa Manguin, Ian Deniell Magsino, Janesky Esplana, Gian Ernest Dizon, Aaron Dacuya
Milkfish (Chanos chanos) is a staple aquaculture product in the Philippines, making food safety and quality assurance essential for consumer protection. This study presents an accuracy-based proficiency testing (PT) scheme to assess the capability of Philippine chemical testing laboratories to quantify toxic elements in milkfish. Philippine Reference Material (PRM) 2002 – As, Cd, Hg & Pb in Milkfish was prepared and distributed to participating laboratories for independent analysis. Results were evaluated using z’-scores and other statistical performance metrics. A total of 26 local testing...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2025
· 10.21014/tc24-2025.004
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Francesca Durbiano, Francesca Rolle, Francesca Pennecchi, Stefano Pavarelli, Ramona Russo, Chiara Festevole, Michela Sega
Carbon dioxide (CO2) is the most important long-lived anthropogenic greenhouse gas. Studying the ratio 13C/12C of the CO2 isotopic composition (δ13C-CO2) in the atmosphere gives useful information for assessing and quantifying the anthropogenic contribution to the continuously growing atmospheric CO2. INRiM, the Italian National Metrology Institute, is deeply involved in supporting the efforts of the metrological community to achieve the comparability of results and to assure accuracy and metrological traceability to CO2 stable isotope measurement results. In this framework, the realization...
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2025
· 10.21014/tc24-2025.003
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Michela Sega, Francesca Rolle, Francesca Durbiano, Stefano Pavarelli, Francesca Romana Pennecchi, Ramona Russo, Chiara Festevole
Measurements of carbon stable isotopes 13C and 12C and of their ratio 13C/12C in atmospheric carbon dioxide (δ13C-CO2) are indicators of the anthropogenic contribution to CO2 emissions. At present, δ13C-CO2 falls within the CIPM MRA traceability exception. Gaseous Certified Reference Materials (CRMs) are needed as proper references to support the scientific community dealing with δ13C-CO2 in atmospheric measurements. The paper presents an approach to assign δ13C-CO2 values to CO2 gas mixtures at atmospheric amount fraction following two independent traceability paths, leading to candidate...
IMEKO TC8, TC11 and TC24 Conference
· TC8
· 2025
· 10.21014/tc8-2025.002
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Mary Joy Bautista, Morris Pioquinto, Jo Marie Venus Agad, Gina Catalan
This study investigates the effectiveness of combining portable analytical techniques - Energy Dispersive X-ray Fluorescence (EDXRF) and Laser-Induced Breakdown Spectroscopy (LIBS) - as alternatives to traditional Spark Optical Emission Spectroscopy (Spark-OES) for the rapid assessment of key alloying elements Carbon (C), Silicon (Si), Manganese (Mn), Phosphorous (P) and Sulfur (S) in deformed steel bars. Both EDXRF and LIBS demonstrated strong accuracy and precision in analyzing C, Si, and Mn, with statistical analysis revealing significant correlations with the Spark-OES benchmark....
IMEKO TC8, TC11 and TC24 Conference
· TC24
· 2025
· 10.21014/tc24-2025.001
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Andrea Bergomi, Paola Fermo, Chiara Lombardi, Michela Pirovano, Antonino Fiorentino, Mattia Borelli, Mario Colella, Valeria Comite
The conservation of outdoor heritage in urban environments requires careful analysis of degradation processes induced by atmospheric pollutants. This study presents the results of a scientific investigation on the marble monument of Giovanni Rasori (1840), located in Milan, a city affected by heavy traffic and industrial emissions. Exposed for decades to an outdoor polluted environment, the monument exhibited visible signs of surface alteration. Analytical techniques, including SEM-EDX and ATR/FTIR, revealed that the primary degradation process was sulfation, confirmed by the presence of...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.148
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Nicolò Di Marco, Elvia Maria Letizia Giudice, Filippo Stanco
This paper presents the results of a research that led to the virtual reconstruction of the Temple of Olympian Zeus of Syracuse within the metaverse. Through the integration of traditional archaeological methodologies and advanced digital technologies, the project offers an immersive experience that allows to explore one of the most significant monuments of Magna Graecia. The paper illustrates the methodological process adopted, the technical challenges faced and the educational and dissemination potential of this approach in the context of the valorization of historical-cultural heritage....
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.147
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Paola Fermo, Valeria Comite, Chiara Andrea Lombardi, Mattia Borelli, Andrea Bergomi, Giulia Galli, Gianluca Carabelli, Daniele Bolleri, Letizia Bonizzoni, Francesca Sabatini
A preliminary investigation into the painting technique and colour palette used in the “Posa della Prima Pietra” canvas by Ismaele Teglio Milla (1853) was carried out in this study. The main goal was to evaluate the presence of preparatory drawings or pentimenti and to spectroscopically characterize the materials used in the artwork. For these purposes, a micro- and non-invasive multi-analytical approach was employed using the following techniques: Multi-Spectral Imaging (MSI), portable X-Ray Fluorescence (XRF), Scanning Electron Microscopy with Energy Dispersive X-ray spectroscopy...
TC26 MetroArcheo Conference 2025
· TC26
· 2025
· 10.21014/tc26-2025.146
· Download