1、Designation: E236 66 (Reapproved 2017)Standard Specification forApparatus for Microdetermination of Alkoxyl Groups1This standard is issued under the fixed designation E236; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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 specification covers apparatus for the microdeter-mination of methoxyl and ethoxyl groups in organic com-pounds
3、.NOTE 1This specification was originally developed by the Committeeon MicrochemicalApparatus, Division ofAnalytical Chemistry,AmericanChemical Society.22. Reaction Flask2.1 The reaction flask shall be of borosilicate glass and shallconform to the requirements of Fig. 1.3. Condenser with Scrubber3.1
4、The West-type condenser with scrubber shall be ofborosilicate glass and conform to the requirements of Fig. 2.NOTE 2Spent scrubbing solution may be removed from the scrubberby inserting through the side arm of the scrubber a drawn-out medicinedropper or small rubber tube connected to a vacuum source
5、.NOTE 3The scrubber is constricted to prevent scrubbing solution frombeing sucked back into the reaction flask or carried over into the receiver.4. Delivery Tube4.1 The delivery tube shall be of borosilicate glass andconform to the requirements of Fig. 3.5. Receivers5.1 Two types of receivers are sp
6、ecified, as follows:5.1.1 Receiver for Volumetric Analysis3shall be of borosili-cate glass and conform to the requirements of Fig. 4.5.1.2 Receiver for Gravimetric Analysis shall be of borosili-cate glass and conform to the requirements of Fig. 5.6. Keywords6.1 alkoxyl; apparatus; groups; microdeter
7、mination1This specification is under the jurisdiction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onLaboratory Ware and Supplies.Current edition approved Jan. 1, 2017. Published February 2017. Originallyapproved in 1964. Last previous edition
8、approved in 2011 as E236 66 (2011).DOI: 10.1520/E0236-66R17.2Committee on Microchemical Analysis, Division of Analytical Chemistry,American Chemical Society. “Report on Recommended Specifications for Micro-chemical Apparatus, Alkoxyl.” Analytical Chemistry , Vol 28, 1956, p. 112.3Used to establish t
9、he officialA.O.A.C. microchemical method for alkoxyl groupdetermination, Offcial Methods of Analysis, 9th Ed., Association of OfficialAgricultural Chemists, Washington, DC, 1960, p. 646.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesT
10、his international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade
11、(TBT) Committee.1All dimensions are in millimetres.FIG. 1 Reaction FlaskE236 66 (2017)2All dimensions are in millimetres.FIG. 2 West-Type Condenser with ScrubberE236 66 (2017)3All dimensions are in millimetres.FIG. 3 Delivery TubeAll dimensions are in millimetres.FIG. 4 Volumetric ReceiverE236 66 (2
12、017)4ASTM International takes no position respecting the validity 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
13、, are entirely their own responsibility.This standard is subject 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 st
14、andardsand should be addressed to ASTM International Headquarters. 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 Co
15、mmittee on Standards, at the address shown below.This standard is 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 aboveadd
16、ress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ dimensions are in millimetres.FIG. 5 Gravimetric ReceiverE236 66 (2017)5
