Determination of physical adsorption loss of primary standard gas mixtures in cylinders using cylinder-to-cylinder division
| Autor: | Sang Hyub Oh, Sangil Lee, Mi Eon Kim, Jin Seog Kim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences General Engineering Analytical chemistry Fraction (chemistry) Division (mathematics) 01 natural sciences Cylinder (engine) law.invention 010309 optics Adsorption law Primary standard 0103 physical sciences Gravimetric analysis 0105 earth and related environmental sciences |
| Zdroj: | Metrologia. 54:L26-L33 |
| ISSN: | 1681-7575 0026-1394 |
| Popis: | Primary standard gas mixtures (PSMs) are typically prepared in cylinders and the amount-of-substance fractions are determined by purity analysis and gravimetric method. However, the actual amount-of-substance fraction can be different from the gravimetrically determined value due to adsorption loss onto the internal surface of cylinders. The resulted difference due to the adsorption loss can be larger than the PSM uncertainty. In this study, the cylinder-to-cylinder division method is proposed to evaluate any potential physical adsorption loss onto the internal surface of cylinders. A method for estimating the amount of adsorption loss, the corrected amount-of-substance fraction and its uncertainty due to the adsorption loss is described. |
| Databáze: | OpenAIRE |
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