ASTM D6785-20
Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry
- Standard No.
- ASTM D6785-20
- Release Date
- 2020
- Published By
- American Society for Testing and Materials (ASTM)
- Latest
- ASTM D6785-20
- 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 (10.2). 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 9). 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.10 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.
ASTM D6785-20 Referenced Document
- ASTM D1193 Standard Specification for Reagent Water
- ASTM D1356 Standard Terminology Relating to Sampling and Analysis of Atmospheres*， 2024-04-22 Update
- ASTM D3195 Standard Practice for Rotameter Calibration
- ASTM D4840 Standard Guide for Sample Chain-of-Custody Procedures
- ASTM D5337 Standard Practice for Flow Rate for Calibration of Personal Sampling Pumps
- ASTM E1370 Standard Guide for Air Sampling Strategies for Worker and Workplace Protection
- ASTM E1792 Standard Specification for Wipe Sampling Materials for Lead in Surface Dust
- ASTM E882 Standard Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
- ISO 1042 Laboratory glassware - One-mark volumetric flasks
- ISO 13137 Workplace atmospheres — Pumps for personal sampling of chemical and biological agents — Requirements and test methods*， 2022-08-31 Update
- ISO 15202-2 Workplace air — Determination of metals and metalloids in airborne particulate matter by inductively coupled plasma atomic emission spectrometry — Part 2: Sample preparation*， 2020-05-05 Update
- ISO 18158 Workplace air — Terminology
- ISO 20581 Workplace air - General requirements for the performance of procedures for the measurement of chemical agents
- ISO 3534-1 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability
- ISO 3585 Borosilicate glass 3.3 - Properties
- ISO 648 Laboratory glassware - Single-volume pipettes
- ISO 6955 Analytical spectroscopic methods; Flame emission, atomic absorption, and atomic fluorescence; Vocabulary Bilingual edition
- ISO 7708 Air quality - Particle size fraction definitions for health-related sampling
- ISO/IEC 17025 General requirements for the competence of testing and calibration laboratories [Standard in French]
ASTM D6785-20 history
- 2020 ASTM D6785-20 Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry
- 2013 ASTM D6785-13 Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry
- 2008 ASTM D6785-08 Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry
- 2002 ASTM D6785-02 Standard Test Method for Determination of Lead in Workplace Air Using Flame or Graphite Furnace Atomic Absorption Spectrometry
