欢迎来到麦多课文档分享! | 帮助中心 海量文档,免费浏览,给你所需,享你所想!
麦多课文档分享
全部分类
  • 标准规范>
  • 教学课件>
  • 考试资料>
  • 办公文档>
  • 学术论文>
  • 行业资料>
  • 易语言源码>
  • ImageVerifierCode 换一换
    首页 麦多课文档分享 > 资源分类 > PDF文档下载
    分享到微信 分享到微博 分享到QQ空间

    ASTM D1109-1984(2007) Standard Test Method for 1% Sodium Hydroxide Solubility of Wood《木材在1%的烧碱中可溶性的标准试验方法》.pdf

    • 资源ID:509272       资源大小:52.59KB        全文页数:2页
    • 资源格式: PDF        下载积分:10000积分
    快捷下载 游客一键下载
    账号登录下载
    微信登录下载
    二维码
    微信扫一扫登录
    下载资源需要10000积分(如需开发票,请勿充值!)
    邮箱/手机:
    温馨提示:
    如需开发票,请勿充值!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)。
    如需开发票,请勿充值!如填写123,账号就是123,密码也是123。
    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,交流精品资源
     
    账号:
    密码:
    验证码:   换一换
      忘记密码?
        
    友情提示
    2、PDF文件下载后,可能会被浏览器默认打开,此种情况可以点击浏览器菜单,保存网页到桌面,就可以正常下载了。
    3、本站不支持迅雷下载,请使用电脑自带的IE浏览器,或者360浏览器、谷歌浏览器下载即可。
    4、本站资源下载后的文档和图纸-无水印,预览文档经过压缩,下载后原文更清晰。
    5、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。

    ASTM D1109-1984(2007) Standard Test Method for 1% Sodium Hydroxide Solubility of Wood《木材在1%的烧碱中可溶性的标准试验方法》.pdf

    1、Designation: D 1109 84 (Reapproved 2007)Technical Association of Pulp and Paper IndustryStandard Method T 212 os-76Standard Test Method for1 % Sodium Hydroxide Solubility of Wood1This standard is issued under the fixed designation D 1109; the number immediately following the designation indicates th

    2、e year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the

    3、solu-bility of wood in a hot dilute alkali solution. A 1 % solution ofsodium hydroxide (NaOH) is used. One application is indetermining the degree of fungus decay that has taken place ina given wood sample. As the wood decays, the percentage ofalkali-soluble material increases in proportion to the d

    4、ecreasein pulp yield caused by the decay.1.2 This standard does not purport to address all of thesafety 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

    5、 limitations prior to use.2. Significance and Use2.1 Hot alkali extracts low molecular weight carbohydratesconsisting mainly of hemicellulose and degraded cellulose inwood. This solubility of wood is an indication of the degree offungal decay, or degradation by heat, light, oxidation, and soforth. T

    6、he more decay or degradation, the higher the solubility.3. Apparatus3.1 Water BathThe water bath shall be designed so thatthe temperature of the material during treatment is uniformlymaintained at 97 to 100C. When a new bath is used thetemperature shall be checked to ensure the use of properconditio

    7、ns. The type of bath recommended is one that iscovered and that has holes in the top of such size that beakersmay be set down in the bath until they are supported by theflared rim of the beakers. The top of the beaker shall be nearlylevel with the cover of the bath. By using this type of bath thesid

    8、es of the beakers are entirely surrounded by boiling water orsteam. The water level in the bath shall be maintained abovethe level of the liquid in the beakers.3.2 BeakersThe beakers shall be tall-form, 200-mL,alkali-resistant glass2beakers.3.3 Filtering CruciblesAlundum or fritted-glass cruciblesof

    9、 medium porosity are recommended for filtering the treatedsawdust.4. Reagents4.1 Sodium Hydroxide Solution (1.0 %)Allow a chemi-cally pure NaOH solution (50 %) to stand about 1 week in astoppered vessel to permit settling of Na2CO3and otherinsoluble impurities. Dilute the supernatant clear solution

    10、withdistilled water free of CO2and adjust to between 0.9 and 1.1 %NaOH.4.2 Acetic Acid (10 %).5. Test Specimen5.1 The test specimen shall consist of air-dried sawdust thathas been ground to pass a 425-m sieve and be retained on a250-m sieve. The weight of the test specimen shall be suchthat it will

    11、be equivalent to 2 6 0.1 g of moisture-free wood.6. Procedure6.1 Place two test specimens in 200-mL, tall-form beakersand add to each 100 mL of NaOH solution (1 %) measuredcarefully with a graduate. After stirring well, place the coveredbeakers in the water bath, which shall be boiling steadily.Leav

    12、e the beakers in the bath for exactly 1 h, stirring thecontents three times, at periods of 10, 15, and 25 min after thebeakers are placed in the bath.6.2 At the end of 1 h, filter the contents of each beaker bysuction on a tared crucible. Wash the sawdust with 100 mL ofhot water, then with 50 mL of

    13、acetic acid (10 %), and thenthoroughly with hot water. Dry the crucible and contents to1This test method is under the jurisdiction of ASTM Committee D07 on Woodand is the direct responsibility of Subcommittee D07.01 on Fundamental TestMethods and Properties.Current edition approved April 1, 2007. Pu

    14、blished April 2007. Originallyapproved in 1950. Last previous edition approved in 201 as D 1109 84 (2001).2Borosilicate glass has been found satisfactory for this purpose.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.constant weigh

    15、t at 100 to 105C, cool in a desiccator, andweigh in a stoppered weighing bottle.7. Calculation and Report7.1 Report the results as weight percentage of matter solublein 1 % sodium hydroxide solution, on the moisture-free basis,calculated as follows:Matter soluble in caustic soda, % 5 W12 W2!/W1# 3 1

    16、00 (1)where:W1= weight of moisture-free wood in specimen prior totest (Section 5), andW2= weight of dried specimen after treatment with theNaOH solution (6.2).7.2 Base the results on the average of at least two determi-nations.8. Precision and Bias38.1 Results obtained from an interlaboratory study

    17、by ninelaboratories on four woods indicate a repeatability of 0.45 andreproducibility of 1.96. The solubility of the wood samplesranged from 11.2 to 17.0 %.8.2 Bias is unknown.9. Keywords9.1 decay; fungal decay; sodium hydroxide; solubilityASTM International takes no position respecting the validity

    18、 of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject

    19、to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters

    20、. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is

    21、 copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).3Data in this section obtained by the TechnicalAssociation of the Pulp and PaperIndustry, P.O. Box 105113, Atlanta, GA 30348.D 1109 84 (2007)2


    注意事项

    本文(ASTM D1109-1984(2007) Standard Test Method for 1% Sodium Hydroxide Solubility of Wood《木材在1%的烧碱中可溶性的标准试验方法》.pdf)为本站会员(unhappyhay135)主动上传,麦多课文档分享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,请立即通知麦多课文档分享(点击联系客服),我们立即给予删除!




    关于我们 - 网站声明 - 网站地图 - 资源地图 - 友情链接 - 网站客服 - 联系我们

    copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
    备案/许可证编号:苏ICP备17064731号-1 

    收起
    展开