ASTM D6785 - 13

    Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry

    Active Standard ASTM D6785 | Developed by Subcommittee: D22.04

    Book of Standards Volume: 11.07


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    Significance and Use

    6.1 The health of workers in many industries, for example, mining, metal refining, battery manufacture, construction, etc., is at risk through exposure by inhalation of particulate lead and lead compounds. Industrial hygienists and other public health professionals need to determine the effectiveness of measures taken to control workers' exposure, and this is generally achieved by making workplace air measurements. This standard has been published in order to make available a method for making valid exposure measurements for lead. It will be of benefit to: agencies concerned with health and safety at work; industrial hygienists and other public health professionals; analytical laboratories; industrial users of metals and metalloids and their workers, etc. It has been assumed in the drafting of this standard that the execution of its provisions, and the interpretation of the results obtained, is entrusted to appropriately qualified and experienced people.

    6.2 The measuring procedure shall comply with any relevant International, European or National Standard that specifies performance requirements for procedures for measuring chemical agents in workplace air (for example, EN 482).

    1. Scope

    1.1 This standard specifies flame and graphite furnace atomic absorption spectrometric methods for the determination of the time-weighted average mass concentration of particulate lead and lead compounds in workplace air.

    1.2 The method is applicable to personal sampling of the inhalable fraction of airborne particles, as defined in ISO 7708, and to static (area) sampling.

    1.3 The sample dissolution procedure specifies hot plate or microwave digestion, or ultrasonic extraction (11.2). The sample dissolution procedure is not effective for all lead compounds (see Section 5). The use of an alternative, more vigorous dissolution procedure is necessary when it is desired to extract lead from compounds present in the test atmosphere that are insoluble using the dissolution procedures described herein. For example if it is desired to determine silicate lead, a hydrofluoric acid dissolution procedure is required.

    1.4 The flame atomic absorption method is applicable to the determination of masses of approximately 1 to 200 μg of lead per sample, without dilution (1).2 The graphite furnace atomic absorption method is applicable to the determination of masses of approximately 0.01 to 0.5 μg of lead per sample, without dilution (1).

    1.5 The ultrasonic extraction procedure has been validated for the determination of masses of approximately 20 to 100 μg of lead per sample, for laboratory-generated lead fume air filter samples (2).

    1.6 The concentration range for lead in air for which this procedure is applicable is determined in part by the sampling procedure selected by the user (see Section 10).

    1.7 Anions that form precipitates with lead may interfere, but this potential interference is overcome by the addition of the disodium salt of ethylenediamine tetraacetic acid (EDTA) when necessary.

    1.8 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

    1.9 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 and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1193 Specification for Reagent Water

    D1356 Terminology Relating to Sampling and Analysis of Atmospheres

    D3195 Practice for Rotameter Calibration

    D4840 Guide for Sample Chain-of-Custody Procedures

    D7035 Test Method for Determination of Metals and Metalloids in Airborne Particulate Matter by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

    E882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory

    E1370 Guide for Air Sampling Strategies for Worker and Workplace Protection

    E1792 Specification for Wipe Sampling Materials for Lead in Surface Dust

    Other Standards

    EN1232 Workplace Atmospheres--Pumps for Personal Sampling of Chemical Agents--Requirements and Test

    EN12919 Workplace Atmospheres--Pumps for Sampling of Chemical Agents with a Volume Flow Rate of Over 5 L/Min--Requirements and Test Methods

    EN13205 Workplace Atmospheres--Assessment of Performance of Instruments for Measurement of Airborne Particle Concentrations

    EN1540 Workplace Atmospheres--Terminology

    EN482 Workplace Exposure--General Requirements for the Performance of Procedures for the Measurement of Chemical Agents

    EN689 Workplace Atmospheres--Guidance for the Assessment of Exposure to Chemical Agents for Comparison with Limit Values and Measurement Strategy

    ENISO8655-1, Piston-Operated Volumetric Instruments--Part 1: Terminology, General Requirements and User Recommendations

    ENISO8655-2 Piston-Operated Volumetric Instruments--Part 2: Piston Pipettes

    ENISO8655-5 Piston-Operated Volumetric Instruments--Part 5: Dispensers

    ENISO8655-6 Piston-Operated Volumetric Instruments--Part 6: Gravimetric Test Methods

    ISO1042 Laboratory Glassware--One-Mark Volumetric Flasks

    ISO13137 Workplace Atmospheres--Pumps for Personal Sampling of Chemical and Biological Agents--Requirements and Test Methods

    ISO15202-2 Workplace Air--Determination of Metals and Metalloids in Airborne Particulate Matter by Inductively Coupled Plasma Atomic Emission Spectrometry--Part 2: Sample Preparation

    ISO3534-1 Statistics--Vocabulary and Symbols--Part 1: General Statistical Terms and Terms Used in Probability

    ISO3585 Glass Plant, Pipelines and Fittings--Properties of Borosilicate Glass 3.3

    ISO648 Laboratory Glassware--One-Mark Pipettes

    ISO6879 Air Quality--Performance Characteristics and Related Concepts For Air Quality Methods

    ISO6955 Analytical Spectroscopic Methods--Flame Emission, Atomic Absorption, and Atomic Fluorescence--Vocabulary

    ISO7708 Particle Size Definitions for Health Related Sampling


    ICS Code

    ICS Number Code 13.040.30 (Workplace atmospheres); 71.040.50 (Physicochemical methods of analysis)

    UNSPSC Code

    UNSPSC Code 77121500(Air pollution); 11101714(Lead)


    DOI: 10.1520/D6785

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