Abstract
A full-factorial experimental design (2^4) was performed to study the impact of the sampling and handling processes on the analysis of gasoline samples. Four independent variables were selected based on the most critical parameters to control during sampling. Vapor pressure determination and distillation curve were chosen as response variables, and the data collected were assessed by analysis of variance as a statistical approach. There were statistically significant differences related to the sample container’s material and the sample’s storage time in the laboratory before the analysis. Also, the measurement variance was estimated at 0.11 from the contributions of the variance of the sampling process and the variance of the analysis process considering vapor pressure results (kPa), which allows the evaluation and control of the random error associated with the sampling process.
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References
International Energy Ag (IEA) (2021) Key world energy statistics 2021. https://www.oecd-ilibrary.org/content/publication/2ef8cebc-en
United Nations (2021) Energy statistics pocketbook. https://unstats.un.org/unsd/energy/pocket/2018/2018pb-web.pdf
Thompson M (1998) Uncertainty of sampling in chemical analysis. Accred Qual Assur 3:117–121. https://doi.org/10.1007/s007690050202
Gy PM (1995) Introduction to the theory of sampling I. Heterogeneity of a population of uncorrelated units. Trends Anal Chem 14:67–76. https://doi.org/10.1016/0165-9936(95)91474-7
EURACHEM/CITAC (n.d) Guide measurement uncertainty arising from sampling a guide to methods and approaches second edition 2019 produced jointly with Eurolab, Nordtest, and RSC analytical methods committee.
Tsimillis KC, Michael S (2022) Uncertainty from sampling: Could the requirements of ISO/IEC 17025 (2017) be adopted in medical laboratories? Int J Reliab Qual E-Healthc. https://doi.org/10.4018/ijrqeh.295082
Guigues N, Desenfant M, Lalere B, Vaslin-Reimann S, Eyl D, Mansuit P, Hance E (2016) Estimating sampling and analysis uncertainties to assess the fitness for purpose of a water quality monitoring network. Accred Qual Assur 21:101–112. https://doi.org/10.1007/s00769-015-1186-4
ISO (2017) ISO/IEC 17025:2017 general requirements for the competence of testing and calibration laboratories. https://www.iso.org/standard/66912.html
Methods A, Amctb C (2019) The role of accreditation in ensuring sampling quality. Anal Methods 11:3358–3360. https://doi.org/10.1039/c9ay90095k
Bodnar M, Namieśnik J, Konieczka P (2013) Validation of a sampling procedure. TrAC Trends Anal Chem 51:117–126. https://doi.org/10.1016/j.trac.2013.06.011
ASTM D5854, Standard Practice for Mixing and Handling of Liquid Samples of Petroleum and, 96 (2015) 1–19. https://doi.org/10.1520/D5854-19A.
ASTM D5842 (2008) Standard practice for sampling and handling of fuels for volatility measurement, 981–981–7. https://doi.org/10.1520/mnl10993m.
ASTM D4057 (2008) Standard practice for manual sampling of petroleum and petroleum products, 628–628–18. https://doi.org/10.1520/mnl10928m
ASTM D7345 (2015) Standard test method for distillation of petroleum products and liquid fuels at atmospheric pressure. B. Stand. 05.01, pp 1–27. https://doi.org/10.1520/D7345-17
ASTM D5191 (2008) Standard test method for vapor pressure of petroleum products (mini method—atmospheric). Man. Hydrocarb. Anal. 6th Ed, 908-908–4. https://doi.org/10.1520/mnl10979m
Gaspar DJ, Phillips SD, Polikarpov E, Albrecht KO, Jones SB, George A, Landera A, Santosa DM, Howe DT, Baldwin AG, Bays JT (2019) Measuring and predicting the vapor pressure of gasoline containing oxygenates. Fuel 243:630–644. https://doi.org/10.1016/j.fuel.2019.01.137
Consejo de Ministros de Integración Económica (COMIECO) (2019) Reglamento Técnico Centroamericano, RTCA 75.01.19:19 - Productos De Petróleo. Gasolina regular. Especificaciones, pp 1–13. https://www.comex.go.cr/media/3319/170_anex_169-rtca75011906.pdf
Acknowledgements
The authors would like to thank Hydrocarbon Analysis Laboratory at the CELEQ, Universidad de Costa Rica, for performing the physicochemical tests.
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The work was funded by CELEQ, Universidad de Costa Rica.
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Both authors contributed to the study’s conception and design. JGH performed the sampling. PFS carried out the statistical analysis of the data. JGH wrote the first draft of the manuscript. PFS reviewed and edited the manuscript.
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González-Hernández, J., Fuentes-Schweizer, P. Systematic study on the variability in the gasoline sampling process at service stations and its contribution to the measurement variance. Accred Qual Assur 29, 31–36 (2024). https://doi.org/10.1007/s00769-023-01569-4
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DOI: https://doi.org/10.1007/s00769-023-01569-4