{"term":{"id":"04272","title":"observation space","longtitle":"IUPAC Gold Book - observation space","doi":"10.1351\/goldbook.O04272","code":"O04272","status":"current","definitions":[{"id":1,"text":"The intersection of the optical beam and that part of the flame where the net signal is at least half of the maximum net signal. The characteristics of the observation space depend on the temperature of the flame, the stoichiometry of the gases and the properties of the processed fluid (presence of proteins for instance). The observation space in atomic absorption is analogous to the observation space of a cuvette in molecular absorption spectrometry.","contexts":[],"links":[{"term":"observation volume","url":"https:\/\/goldbook.iupac.org\/terms\/view\/O04273"},{"term":"proteins","url":"https:\/\/goldbook.iupac.org\/terms\/view\/P04898"},{"term":"spectrometry","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S05848"},{"term":"stoichiometry","url":"https:\/\/goldbook.iupac.org\/terms\/view\/S06026"}],"sources":["PAC, 1986, 58, 1737. 'Quantities and units in clinical chemistry: Nebulizer and flame properties in flame emission and absorption spectrometry (Recommendations 1986)' on page 1741 (https:\/\/doi.org\/10.1351\/pac198658121737)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/O04272\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/O04272\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/O04272\/plain"},"citation":"Citation: 'observation space' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.O04272","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-30T15:43:10+00:00"}}