1、Designation:D744108(Reapproved 2013)Standard Practice forSeparation of Beryllium from Other Metals in Digestion andExtraction Solutions from Workplace Dust Samples1This standard is issued under the fixed designation D7441;the number immediately following the designation indicates the year oforiginal
2、 adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the separation of beryllium fromother metals and meta
3、lloids in acid solutions,by extractionchromatography,for subsequent determination of beryllium byatomic spectroscopy techniques such as inductively coupledplasma atomic emission spectroscopy(ICP-AES).1.2 This practice is applicable to samples of settled dust thathave been collected in accordance wit
4、h Practices D6966 orD7296.1.3 This practice is compatible with a wide variety of aciddigestion techniques used in digesting settled dust samples,such as those described in Test Method D7035.1.4 This practice is appropriate for the preparation of settleddust samples where an unacceptable bias is susp
5、ected or knownbecause of spectral interferences caused by other metals ormetalloids present in the sample.This practice may also beappropriate for the analysis of other types of samples.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is there
6、sponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis o
7、fAtmospheresD6966 Practice for Collection of Settled Dust SamplesUsing Wipe Sampling Methods for Subsequent Determi-nation of MetalsD7035 Test Method for Determination of Metals and Met-alloids in Airborne Particulate Matter by InductivelyCoupled Plasma Atomic Emission Spectrometry(ICP-AES)D7296 Pra
8、ctice for Collection of Settled Dust SamplesUsing Dry Wipe Sampling Methods for Subsequent De-termination of Beryllium and CompoundsE882 Guide for Accountability and Quality Control in theChemical Analysis Laboratory3.Terminology3.1 For discussion of pertinent terms not discussed here,seeTerminology
9、 D1356.3.2 Definitions:3.2.1 digestiondissolution using a combination of acidsand other reagents of solid materials into solution for subse-quent instrumental analysis.3.2.2 eluatethe effluent from a chromatography or resincolumn.3.2.3 extraction chromatographyliquid chromatographyapplied to the sep
10、aration of metal ions utilizing selectiveorganic extractants as the stationary phase and the aqueoussolution as the mobile phase(1)3.3.2.3.1 DiscussionExtraction chromatography resins con-sist of inert porous beads coated with selective extractants.3.2.4 spectral interferencean interference caused b
11、y theemission from a species other than the analyte of interest.D70353.2.5 surface wiperefers either to a wetted wipe,asdefined in Practice D6966,or to a dry wipe,as defined inPractice D7296,used to gather material from a surface forsubsequent analysis.3.2.5.1 DiscussionThe terms wipe sampling,swipe
12、sampling,and smear sampling describe the techniques used toassess surface contamination on the skin,work surfaces,andPPE surfaces(for example,gloves,respirators,aprons,etc.)3.2.6 vacuum boxcontainer used to maintain a vacuum ona resin or column sample in order to increase the rate of flow1This pract
13、ice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 2008.Last previous edition approved in 2008 as D7441 08.DOI:10.1520/D7441
14、-08R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The boldface numbers in parentheses refer to a list of ref
15、erences at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 of liquid through the column.Other vacuum sources such as anaspirator may be used.4.Summary of Practice4.1 This practice is based on using extraction chrom
16、atogra-phy resin to separate beryllium ions from other metal ions inextracts and digestates of surface wipe samples.4.2 Surface wipe samples are collected using PracticeD6966 or Practice D7296,and are then digested or extractedinto solution by mineral acids.4.3 The pH of the solution is adjusted to between 1 and 2with sodium acetate.4.4 The sample is then loaded onto the extraction chroma-tography resin column,where beryllium is retained.Matrixinterferences are rinsed from the column with 0.2 M
