ASTM_D_3413_-_85_scan.pdf

ASTM D34L3 85 m 0759530 0030223 L I k,.-&u,-zs Designation:D 3413-85 AMERICAN SOCIETY FOR TESTING AND MATERlAis 1916 Race St.,Philadelphia,Pa.19103 Repririted f&m the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combined index,will appear in the next edition.Standard Test Method for LEAD(INORGANIC)IN WORKPLACE ATMOSPHERES BY ATOMIC ABSORPTION SPECTROMETRY This standard is issued under the fixed designation D 3413:the number immediately following the designation indicates the year of original adoption or.in the case of revision.the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon(f)indicates an editorial change since the last revision or reapproval.1.Scope 1.1 This method covers the determination by atomic absorption spectrophotometry of low concentrations of lead(Pb)in air samples col-lected on filters,electrostatic precipitator tubes,or impingers.1.2 With a properly operating atomic absorp-tion spectrophotometer.concentrations as low as 0.2 pg of lead per millilitre(microgram per mil-lilitre)of solution may be determined.1.3 This standard may involve hazardous ma-terials,operations.and equipment.This standard does not purport to address all of the safety prob-lems associated with its use.It is the responsibil-ity of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limi-tations prior fo use.(For more specific safety precautionary information see Section 9.)2.Applicable Documents 2.1 ASTM Standards:D 1193 Specification for Reagent Wate?D 1356 Definitions of Terms Relating to At-*.mospheric Sampling and Analysi$:;=;:JJ 13-33.Pieti,fliiiifhe-ing of:.the-e.mbieiifXtmosphe3:-.:z i_-D 4 1.85 Test Methods for,Metals in Wkplace Atmosphere by-.Atomic Absorptioti Spec-trophotomet$2.2 American National Standards:237.11 Acceptable Concentrations of Toxic Dusts and Gases:Lead and Its Inorganic Com-pounds.1 3.Summary of Method 3.1 The filter(cellulose ester membrane)is ashed with nitric acid,the ash is dissolved in dilute nitric and diluted to a known volume.3.2 The sample is washed from the electro-static precipitator with dilute nitric acid using a rubber policeman for quantitative transfer.The sample is diluted to a known volume.3.3 The impinger sample is quantitatively transferred to a volumetric flask and diluted to a known volume.3.4 The sample,diluted to a known volume,is aspirated into an air-acetylene flame of the atomic absorption spectrophotometer and the absorbance at the 283.3-nm line of lead is mea-sured.4.Significance and Use 4.1 The current permissible exposure limit(PEL)is fifty micrograms of lead per cubic metre of air(50 pg/m3)averaged over an 8-h period.The action level is thirty micrograms of lead per cubic metre(30 pg/m3)averaged over an 8-h period.4 4.2 This method is recommed because it is captible=$f measuring the conc&r$tion ea&;:a.iq+.r-This me&d is under the jurisdictiof ASTM Committee gi.D-22 on S&i&ing and Analysis of”Atmospheres,ana is the.direct respodsibility of Subcommittee D22.04 on Analysis of.Wdrk Space Atmospheres.Current edition approved March 20,1985.Published May 1985.Originally published as D 3413-75 T.Last previous edi-tionD3413-75T.2Annual Book of ASTM Smndards,Vols I 1.Ol and I 1.03.Amtial Book of ASTM Smdards,Vol 11.03.Federal Register,29 CFR 1910.1025.NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.within the range of interest in atmospheric sam-ples.5.Definitions 5.1 For definitions of terms used in this method,refer to Definitions D 1356.6.Interferences 6.1 Interferences have been noted from alu-minum,beryllium,thorium,and.zirconium when low-temperature flames and unmodulated equipment was used.i.6,2 Delead all glassware with nitric acid before use.6,3 When analyzing for metals at the trace level,take care to assure that the laboratory environment is free of the analysis metal.7.Apparatus I.1 Atomic Absorption.Spectrophotometer having a monochromator with a reciprocal linear dispersion in the ultraviolet of about 6.5 nm/mm.7.2 Lead Hollow Cathode Lamp,of high spec-tral purity.1.3 Acetylene Gas and Regulator-A cylinder of acetylene equipped with a two-stage pressure reducing regulator and hose connection.7.4 Air,clean dry compressed,with a two-stage regulator.7.5 Glassware,borosilicate.7.6 Electrostatic Precipitator.7.7 Membrane Filter(0.45 pm cellulose).8.Reagents 8.1 Purity ofReagents-Reagent grade chem-icals shall be used in all tests.Unless otherwise indicated,it is intended that all reagents shall conform to the specifications of the committee on Analytical Reagent of the American Chemical Society,where such specifications are available.Other reagents may be used provided it can be demonstrated that they are of sufficiently high purity to permit their use without decreasing the accuracy