ImageVerifierCode 换一换
格式:PDF , 页数:3 ,大小:80.90KB ,
资源ID:175304      下载积分:10 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。 如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【https://www.wnwk.com/docdown/175304.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: QQ登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM_D_6058_-_96_2016.pdf)为本站会员(益****师)主动上传,蜗牛文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知蜗牛文库(发送邮件至admin@wnwk.com或直接QQ联系客服),我们立即给予删除!

ASTM_D_6058_-_96_2016.pdf

1、Designation:D605896(Reapproved 2016)Standard Practice forDetermining Concentration of Airborne Single-CrystalCeramic Whiskers in the Workplace Environment1This standard is issued under the fixed designation D6058;the number immediately following the designation indicates the year oforiginal adoption

2、 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 is intended to assist individuals in thesampling and analysis of sing

3、le-crystal ceramic whiskers(SCCW),such as silicon carbide and silicon nitride,in theworkplace environment.It describes sampling and analyticaltechniques used to assess the airborne concentration and sizedistribution of SCCW,which may occur in and around theworkplace where these materials are manufac

4、tured,processed,transported,or used.1.2 The protocols currently in use for asbestos and otherfibrous materials have been used as a guide in developingsampling and analytical procedures for characterizing fibersproduced from the manufacture and use of SCCW.Thesampling and analysis protocols described

5、 here have beenwritten specifically for SCCW,however,they may be appro-priate for other man-made mineral fibers(MMMF).1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesa

6、fety concerns,if any,associated with its use.It is theresponsibility 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:2D1356 Terminology Relating to Samp

7、ling and Analysis ofAtmospheresD6056 Test Method for Determining Concentration of Air-borne Single-Crystal Ceramic Whiskers in the WorkplaceEnvironment by Transmission Electron MicroscopyD6057 Test Method for Determining Concentration of Air-borne Single-Crystal Ceramic Whiskers in the WorkplaceEnvi

8、ronment by Phase Contrast MicroscopyD6059 Test Method for Determining Concentration of Air-borne Single-Crystal Ceramic Whiskers in the WorkplaceEnvironment by Scanning Electron Microscopy3.Terminology3.1 For definitions of terms used in this practice,refer toTerminology D1356.3.2 Definitions:3.2.1

9、man-made mineral fiber,nany inorganic fibrousmaterial produced by chemical or physical processes.3.2.2 single-crystal ceramic whisker,na man-made min-eral fiber that has a single-crystal structure.3.2.2.1 DiscussionAlthough the terms fiber and whiskerare,for convenience,used interchangeably in this

10、practice,whisker is correctly applied only to single-crystal fiberswhereas a fiber may be single-or poly-crystalline or may benoncrystalline.4.Summary of Practice4.1 This practice is based on a three-tier approach to thequantitative assessment of airborne SCCW levels.It includesdetailed procedures t

11、o analyze standard air sampling cassettesby phase contrast microscopy(PCM),scanning electron mi-croscopy(SEM),and transmission electron microscopy(TEM).4.2 The choice of a particular analytical method shall bebased on the visibility limitation of each instrument and anunderstanding of the actual siz

12、e distribution of the fibers beinganalyzed.4.3 In general,PCM is suitable for the analysis of fibers thatare greater than approximately 0.25 m in diameter.Dependingon the instrument and the sample preparation method used,theSEM may be capable of examining fibers as small as 0.10 min diameter.TEM has

13、 been shown to be suitable for the studyof even finer fibers.The high resolution of this instrumentmakes it well suited for the determination of the fraction of afiber population with diameters 0.10 to 0.25 m.1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the dire

14、ct responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition approved Oct.1,2016.Published October 2016.Originallyapproved in 1996.Last previous edition approved in 2011 as D6058 96(2011).DOI:10.1520/D6058-96R16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,

15、orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.4 In addition to an e

16、nhanced image resolution,SEM andTEM have the further advantage of providing elementalcomposition information on a single fiber.Furthermore,TEMmay also be used to ascertain crystallographic data on the fiber.This additional information is frequently helpful in the analysisof samples which contain numerous unknown fibers and,thus,SEM or TEM,or both,are preferred in such instances.5.Significance and Use5.1 The SCCW may be present in the workplace atmospherewherethesematerialsaremanufactured,process

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2