Potřebujeme váš souhlas k využití jednotlivých dat, aby se vám mimo jiné mohly ukazovat informace týkající se vašich zájmů. Souhlas udělíte kliknutím na tlačítko „OK“.
Standard Practice for Collection of Surface Dust by Micro-vacuum Sampling for Subsequent Determination of Metals and MetalloidsPřeložit název
NORMA vydána dne 1.5.2021
Označení normy: ASTM D7144-21
Datum vydání normy: 1.5.2021
Kód zboží: NS-1024663
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
dust, metalloids, metals, surfaces, vacuum sampling,, ICS Number Code 71.040.99 (Other standards related to analytical chemistry)
|Significance and Use|
5.1Human exposure to toxic metals and metalloids present in surface dust can result from dermal contact with or ingestion of contaminated dust. Also, inhalation exposure can result from disturbing dust particles from contaminated surfaces. Thus, standardized methods for the collection and analysis of metals and metalloids in surface dust samples are needed in order to evaluate the potential for human exposure to toxic elements.
5.2This practice involves the use of sampling equipment to collect surface dust samples that may contain toxic metals and metalloids, and is intended for use by qualified technical professionals.
5.3This practice allows for the subsequent determination of collected elemental concentrations on an area (loading) or mass concentration basis, or both.
5.4Because particle losses can occur due to collection of dust onto the inner surfaces of the nozzle, the length of the collection nozzle is specified in order that such losses are comparable from one sample to another.
5.5This practice is suitable for the collection of surface dust samples from, for example: (a) soft, porous surfaces such as carpet or upholstery; 5.6Procedures presented in this practice are intended to provide a standardized method for dust collection from surfaces that cannot be reliably sampled using wipe collection methods (for example, Practice ). Additionally, the procedure described uses equipment that is readily available and in common use for other environmental and occupational hygiene sampling applications.
5.7The entire contents of the filter holder, that is, the filter plus collected dust, is targeted for subsequent analysis for metals and metalloids content. An internal capsule is used if gravimetric analysis is necessary.
1.1This practice covers the micro-vacuum collection of surface dust for subsequent determination of metals and metalloids. The primary intended application is for sampling from soft, rough, or porous surfaces.
1.2Micro-vacuum sampling is carried out using a collection nozzle attached to a filter holder (sampling cassette) that is connected to an air sampling pump.
1.3This practice allows for the subsequent determination of metals and metalloids on a loading basis (mass of element(s) per unit area sampled), or on a concentration basis (mass of element(s) per unit mass of sample collected), or both.
1.4The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5LimitationsDue to a number of physical factors inherent in the micro-vacuum sampling method, analytical results for vacuum dust samples are not likely to reflect the total dust contained within the sampling area prior to sample collection. Indeed, dust collection will generally be biased towards smaller, less dense dust particles. Nevertheless, the use of this standard practice will generate data that are consistent and comparable between operators performing micro-vacuum collection at a variety of sampling locations and sites.
1.6This 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.
1.7This 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.
|2. Referenced Documents|
Chcete pravidelně odebírat informace o nově vycházejících normách z celého světa a to zcela zdarma?
Přihlašte se k odběru. Vše je velice jednoduché a absolutně ZDARMA.
Na výběr máte vydavatele z celého světa.
Poslední aktualizace: 07.02.2023 (Počet položek: 2 663 633)
© Copyright 2023 NORMSERVIS s.r.o.