1、Designation: D 6142 08Standard Test Method forAnalysis of Phenol by Capillary Gas Chromatography1This standard is issued under the fixed designation D 6142; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the determination of knownimpurities in phenol by gas chromatography (GC). It isgenerally meant for the ana
3、lysis of phenol of 99.9 % or greaterpurity.1.2 This test method has been found applicable over impu-rity concentrations of 15 to 70 mg/kg. Users of this methodbelieve it is linear over a wider range.1.3 In determining the conformance of the test results usingthis method to applicable specifications,
4、 results shall berounded off in accordance with the rounding-off method ofPractice E29.1.4 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns, if any, associat
5、ed 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. For specific hazardstatements, see Section 9.2. Referenced Documents2.1 ASTM Standards:2D 3852 Practice
6、 for Sampling and Handling Phenol,Cresols, and Cresylic AcidD 4307 Practice for Preparation of Liquid Blends for Use asAnalytical StandardsD 4790 Terminology of Aromatic Hydrocarbons and Re-lated ChemicalsD 6809 Guide for Quality Control and Quality AssuranceProcedures for Aromatic Hydrocarbons and
7、Related Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 355 Practice for Gas Chromatography Terms and Rela-tionshipsE 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE 1510 Practice for Insta
8、lling Fused Silica Open TubularCapillary Columns in Gas Chromatographs2.2 Other Document:OSHA Regulations, 29 CFR paragraphs 1910.1000 and1910.120033. Terminology3.1 See Terminology D 4790 for definition of terms used inthis test method.4. Summary of Test Method4.1 A known amount of an internal stan
9、dard is added to asample of phenol. The prepared sample is mixed and analyzedby a gas chromatograph equipped with a flame ionizationdetector (FID). The peak area of each impurity and the internalstandard is measured. The amount of each impurity is calcu-lated from the ratio of the peak area of the i
10、nternal standardversus the peak area of the impurity. Results are reported inmilligrams per kilogram.5. Significance and Use5.1 This test method is suitable for setting specifications onphenol and for use as an internal quality control tool wherephenol is produced or is used in a manufacturing proce
11、ss. Itmay also be used in development or research work involvingphenol. It is generally applied to determining those commonlyoccurring impurities such as mesityl oxide, cumene, hydroxy-acetone, acetone, alpha-methylstyrene, 2-methylbenzofuran,acetophenone, o-cresol, and m acetone; acetophenone;a-met
12、hylstyrene; cumene; gas chromatography; hydroxyacetone;mesityl oxide;m o-cresol; phenol;sec-butyl alcoholSUMMARY OF CHANGESCommittee D16 has identified the location of selected changes to this standard since the last issue(D 6142 - 03) that may impact the use of this standard. (Approved December 1,
13、2008.)(1) Section 1 modified to meet current editorial guidelines.(2) Section 2 Practice D 4307 and Guide D 6809 added.(3) Section 8 modified description of gases to meet currenteditorial standards.(4) Section 17 added and subsequent section renumbered.ASTM International takes no position respecting
14、 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, are entirely their own responsibility.This standar
15、d 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 standardsand should be addressed to ASTM International
16、 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 Committee on Standards, at the address shown below.Thi
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