1、Designation: E 236 66 (Reapproved 2006)Standard Specification forApparatus for Microdetermination of Alkoxyl Groups1This standard is issued under the fixed designation E 236; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 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 specification covers apparatus for the microdeter-mination of methoxyl and ethoxyl groups in organic com-pou
3、nds.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
4、.1 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 sou
5、rce.NOTE 3The scrubber is constricted to prevent scrubbing solutionfrom being sucked back into the reaction flask or carried over into thereceiver.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
6、specified, 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 boro-silicate glass and conform to the requirements of Fig. 5.6. Keywords6.1 alkoxyl; apparatus; groups; microdet
7、ermination1This specification is under the jurisdiction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition approved Nov. 1, 2006. Published December 2006. Originallyapproved in 1964. Last previous edition approved in 2001
8、as E 236 66 (2001)e1.2Committee 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 the official A.O.A.C. microchemical meth
9、od for alkoxylgroup determination, Offcial Methods of Analysis, 9th Ed., Association of OfficialAgricultural Chemists, Washington, DC, 1960, p. 646.All dimensions are in millimetres.FIG. 1 Reaction Flask1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-29
10、59, United States.All dimensions are in millimetres.FIG. 2 West-Type Condenser with ScrubberE 236 66 (2006)2All dimensions are in millimetres.FIG. 3 Delivery TubeAll dimensions are in millimetres.FIG. 4 Volumetric ReceiverE 236 66 (2006)3ASTM International takes no position respecting the validity o
11、f 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 to
12、 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.
13、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 c
14、opyrighted 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).All dimensions are in millimetres.FIG. 5 Gravimetric ReceiverE 236 66 (2006)4
