ASTM D5442-1993(2003)e1 Standard Test Method for Analysis of Petroleum Waxes by Gas Chromatography《用色谱法分析石油石蜡的标准试验方法》.pdf
《ASTM D5442-1993(2003)e1 Standard Test Method for Analysis of Petroleum Waxes by Gas Chromatography《用色谱法分析石油石蜡的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D5442-1993(2003)e1 Standard Test Method for Analysis of Petroleum Waxes by Gas Chromatography《用色谱法分析石油石蜡的标准试验方法》.pdf(6页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 5442 93 (Reapproved 2003)e1An American National StandardStandard Test Method forAnalysis of Petroleum Waxes by Gas Chromatography1This standard is issued under the fixed designation D 5442; the number immediately following the designation indicates the year oforiginal adoption or, in
2、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.e1NOTEWarning notes were editorially moved into the standard text in August 2003.1. Scope1.1 Th
3、is test method covers the quantitative determinationof the carbon number distribution of petroleum waxes in therange from n-C17through n-C44by gas chromatography usinginternal standardization. In addition, the content of normal andnon-normal hydrocarbons for each carbon number is alsodetermined. Mat
4、erial with a carbon number above n-C44isdetermined by its difference from 100 mass % and reported asC45+.1.2 This test method is applicable to petroleum derivedwaxes, including blends of waxes. This test method is notapplicable to oxygenated waxes, such as synthetic polyethyl-ene glycols (for exampl
5、e, Carbowax2), or natural products suchas beeswax or carnauba.1.3 This test method is not directly applicable to waxes withoil content greater than 10 % as determined by Test MethodD 721.1.4 The values stated in SI units are to be regarded as thestandard.1.5 This standard does not purport to address
6、 all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:D 721 Te
7、st Method for Oil Content of Petroleum Waxes3D 4307 Practice for Preparation of Liquid Blends for Use asAnalytical Standards4D 4419 Test Method for Determination of Transition Tem-peratures of Petroleum Waxes by Differential ScanningCalorimetry (DSC)4D 4626 Practice for Calculation of Gas Chromatogr
8、aphicResponse Factors4E 260 Practice for Packed Column Gas Chromatography5E 355 Practice for Gas Chromatography Terms and Rela-tionships53. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 carbon numbera number corresponding to the num-ber of carbon atoms in a hydrocarbon.3.1.2 co
9、ol on-column injectiona sample introductiontechnique in gas chromatography where the sample is injectedinside the front portion of a partition column at a temperatureat or below the boiling point of the most volatile component inthe sample.3.1.3 low volume connectora metal or glass union de-signed t
10、o connect two lengths of capillary tubing. Usuallydesigned so that the tubing ends are joined with a minimum ofeither dead volume or overlap between them.3.1.4 non(normal paraffn)hydrocarbon (NON)all otherhydrocarbon types excluding those hydrocarbons with carbonatoms in a single length. Includes ar
11、omatics, naphthenes, andbranched hydrocarbon types.3.1.5 normal paraffna saturated hydrocarbon which hasall carbon atoms bonded in a single length, without branchingor hydrocarbon rings.3.1.6 wall coated open tube (WCOT)a term used tospecify capillary columns in which the stationary phase iscoated o
12、n the interior surface of the glass or fused silica tube.Stationary phase may be cross-linked or bonded after coating.4. Summary of Test Method4.1 Weighed quantities of the petroleum wax and an internalstandard are completely dissolved in an appropriate solvent andintroduced into a gas chromatograph
13、ic column that separatesthe hydrocarbon components by increasing carbon number.The column temperature is linearly increased at a reproduciblerate until the sample is completely eluted from the column.4.2 The eluted components are detected by a flame ioniza-tion detector and recorded on a strip chart
14、 or computer system.The individual carbon numbers are identified by comparing theretention times obtained from a qualitative standard with the1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.04 o
15、n Hydrocarbon Analysis.Current edition approved May 10, 2003. Published August 2003. Originallyapproved in 1993. Last previous edition approved in 1998 as D 544293 (1998).2Carbowax is a registered trademark of Union Carbide Corp.3Annual Book of ASTM Standards, Vol 05.01.4Annual Book of ASTM Standard
16、s, Vol 05.02.5Annual Book of ASTM Standards, Vol 03.06.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.retention times of the wax sample. The percent of eachhydrocarbon number through C44is calculated via internalstandard calculation
17、s after applying response factors.4.3 For samples with final boiling points greater than 538Ccomplete elution of all components may not be achieved underthe specified conditions. For this reason, the C45+material isdetermined by summing the concentrations of each individualcarbon number through C44a
18、nd subtracting this total from 100mass %.5. Significance and Use5.1 The determination of the carbon number distribution ofpetroleum waxes and the normal and non-normal hydrocarbonsin each can be used for control of production processes as wellas a guide to performance in many end uses.5.2 Data resul
19、ting from this test method are particularlyuseful in evaluating petroleum waxes for use in rubber formu-lations.6. Apparatus6.1 ChromatographAny gas chromatographic instrumentthat can accommodate a WCOT column, equipped with a flameionization detector (FID), and that can be operated at theconditions
20、 given in Table 1 may be employed. The chromato-graph should be equipped with a cool on-column inlet (orequivalent) for introducing appropriate quantities of samplewithout fractionation. In addition, the gas chromatograph mustbe capable of generating a chromatogram where the retentiontimes of an ind
21、ividual peak have retention time repeatabilitywithin 0.1 min. Refer to Practices E 260 and E 355 for generalinformation on gas chromatography.6.2 Sample Introduction SystemAny system capable ofintroducing a representative sample onto the front portion of aWCOT column may be employed. Cool on-column
22、injection ispreferred, however other injection techniques can be usedprovided the system meets the specification for linearity ofresponse in 9.6. For cool on-column injection, syringes with0.15 to 0.25-mm outside diameter needles have been usedsuccessfully for columns 0.25-mm inside diameter or larg
23、erand standard 0.47-mm outside diameter syringe needles havebeen used for columns 0.53-mm inside diameter or greater.6.2.1 Care must be taken that the sample size chosen doesnot allow some peaks to exceed the linear range of the detectoror overload the capacity of the column.6.3 Column(s)Any column
24、used must meet the chromato-graphic resolution specification in 9.5. WCOT columns with 25to 30-m lengths and a stationary phase coating of methylsiloxane or 5 % phenyl methyl siloxane have been successfullyused. Cross-linked or bonded stationary phases are preferred.6.4 RecorderA recording potentiom
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD544219932003E1STANDARDTESTMETHODFORANALYSISOFPETROLEUMWAXESBYGASCHROMATOGRAPHY 用色 分析 石油 石蜡 标准 试验

链接地址:http://www.mydoc123.com/p-519794.html