Standard Practice for Collection of Surface Dust by Micro-vacuum Sampling for Subsequent Determination of Metals and Metalloids

Importancia y uso:

5.1 Human 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.

5.2 This 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.

5.3 This practice allows for the subsequent determination of collected elemental concentrations on an area (loading) or mass concentration basis, or both.

5.4 Because 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.

5.5 This practice is suitable for the collection of surface dust samples from, for example: (a) soft, porous surfaces such as carpet or upholstery; (b) hard, rough surfaces such as concrete or roughened wood; (c) confined areas that cannot be easily sampled by other means (such as wipe sampling as described in Practice D6966). A companion sampling technique that may be used for collection of surface dust from hard, smooth surfaces is wipe sampling (Practice D6966). A companion vacuum sampling technique that may be used for sampling carpets is described in Practice D5438.

5.6 Procedures 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 D6966). Additionally, the procedure described uses equipment that is readily available and in common use for other environmental and occupational hygiene sampling applications.

5.7 The 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.

Subcomité:

D22.04

Referida por:

D1356-20A, D6966-18, D1356-20A, D8568-24, D1356-20A, D5438-23, D7296-18, E1775-24, D7659-21, D8344-24, E3203-24A, E1979-21, D7202-22, E3272-23, E3193-23

Volúmen:

11.07

Número ICS:

71.040.99 (Other standards related to analytical chemistry)

Palabras clave:

dust; metalloids; metals; surfaces; vacuum sampling;