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The apparatus was tested with anthracene and 1,3,5\u2010triphenylbenzene and subsequently used for the study of sublimation behavior of several proteinogenic amino acids. Their low volatility and thermal instability strongly limit possibilities of studying their sublimation behavior and available literature data. The results presented in this work are unique in their temperature range and low uncertainty required for benchmarking theoretical studies of sublimation behavior of molecular crystals. The possibility of dimerization in the gas phase that would invalidate the effusion experiments is addressed and disproved by theoretical calculations. The enthalpy of sublimation of each amino acid is analyzed based on the contributions in two hypothetical sublimation paths involving the proton transfer in the solid and in the gas phase.<\/jats:p>","DOI":"10.1002\/cphc.202000078","type":"journal-article","created":{"date-parts":[[2020,3,31]],"date-time":"2020-03-31T04:31:40Z","timestamp":1585629100000},"page":"938-951","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Volatility Study of Amino Acids by Knudsen Effusion with QCM Mass Loss Detection"],"prefix":"10.1002","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2839-8546","authenticated-orcid":false,"given":"Vojt\u011bch","family":"\u0160tejfa","sequence":"first","affiliation":[{"name":"Department of Physical Chemistry University of Chemistry and Technology Prague  Technick\u00e1 5 166 28 Prague 6 Czech Republic"},{"name":"CIQUP, Departamento de Qu\u00edmica e Bioqu\u00edmica Faculdade de Ci\u00eancias Universidade do Porto  Rua do Campo Alegre, 687 4169-007 Porto Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4145-7982","authenticated-orcid":false,"given":"V\u00e1clav","family":"Pokorn\u00fd","sequence":"additional","affiliation":[{"name":"Department of Physical Chemistry University of Chemistry and Technology Prague  Technick\u00e1 5 166 28 Prague 6 Czech Republic"}]},{"given":"Carlos F. 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