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Description of ASTM-D8623 2025ASTM D8623-25Active Standard: Standard Practice for Environmental Odor Screening for Single, Character-Defining Odorants; Using Gas Chromatography-Mass Spectrometry Olfactometry (GC-MS-O) Analysis and On-Instrument Odor-Matching ConfirmationASTM D8623Scope 1.1 This practice presents a general strategy for using an analytic, odorant-prioritization-based approach for environmental odor assessment. It is based upon the premise that, while the composition of environmental odors detected by human receptors carries the potential for extreme complexity, simplification (that is, reduction of odorant field to smallest number of odor impactful compounds) typically occurs along the decreasing odor density gradient relative to the source (1-3).2 The odorant prioritization protocol (OPP) is a strategy that encourages initial identification of odor and focuses upon the minimum subset of odorous gases, which are sensory-detectable at the odor frontal boundary. 1.2 The OPP approach to environmental odor assessment is not presented as a replacement or substitute for established, quantitative Dynamic Dilution Olfactometry (DDO) methods (for example, Practices E679 and E1432), which form the current regulatory and enforcement basis for odor air quality impacts. Rather, this OPP approach is a voluntary, qualitative, and complementary assessment strategy for focused odor assessment and monitoring to support odor mitigation strategy development. 1.3 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Keywords air pollution; air quality; air sampling; environmental odor; GC-O; MDGC-MS-O; mitigation; multi-dimensional gas chromatography-mass spectrometry-olfactometry; nuisance odor; odorant prioritization; odorant prioritization protocol; olfactometry; OPP; rolling unmasking effect; sensory analysis; simultaneous sensory and chemical analysis; SPME; VOCs; volatile analysis; volatile organic compound; ICS Code ICS Number Code n/a DOI: 10.1520/D8623-25 This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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