ASTM D6447-2009 488 Standard Test Method for Hydroperoxide Number of Aviation Turbine Fuels by Voltammetric Analysis《使用伏特分析测定航空涡轮燃料氢过氧化物值用标准试验方法》.pdf
《ASTM D6447-2009 488 Standard Test Method for Hydroperoxide Number of Aviation Turbine Fuels by Voltammetric Analysis《使用伏特分析测定航空涡轮燃料氢过氧化物值用标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6447-2009 488 Standard Test Method for Hydroperoxide Number of Aviation Turbine Fuels by Voltammetric Analysis《使用伏特分析测定航空涡轮燃料氢过氧化物值用标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 6447 09An American National StandardStandard Test Method forHydroperoxide Number of Aviation Turbine Fuels byVoltammetric Analysis1This standard is issued under the fixed designation D 6447; 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 () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 The test method covers the determination of the hydro-peroxide content of aviation
3、 turbine fuels.The test method mayalso be applicable to the determination of the hydroperoxidecontent of any water-insoluble, organic fluid, particularlydiesel fuels, gasolines, and kerosines.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included
4、in thisstandard.1.3 This standard does not purport to address all the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to consult and establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior t
5、o use. For specific warningstatements, see 6.3-6.5, Annex A1, and Annex A2.2. Referenced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent WaterD 3703 Test Method for Hydroperoxide Number of Avia-tion Turbine Fuels, Gasoline and Diesel FuelsD 4057 Practice for Manual Sampling of Petroleu
6、m andPetroleum Products3. Summary of Test Method3.1 A quantity of sample is contacted with aqueous potas-sium iodide solution in the presence of acid. The hydroperox-ides present are reduced by the potassium iodide. An equiva-lent amount of iodine is liberated, which is quantified byvoltammetric ana
7、lysis. The results are calculated and reportedas millimoles (mmole) of hydroperoxide per litre of sample.4. Significance and Use4.1 This test method and Test Method D 3703 measure thesame peroxide species (primarily hydroperoxides) in aviationfuels.4.2 The magnitude of the hydroperoxide number is an
8、indication of the quantity of oxidizing constituents present.Deterioration of fuel results in the formation of hydroperoxidesand other oxygen-carrying compounds. The hydroperoxidenumber measures those compounds that will oxidize potassiumiodide.4.3 The determination of the hydroperoxide number of fu
9、elsis significant because of the adverse effect of hydroperoxidesupon certain elastomers in the fuel systems.5. Apparatus5.1 Voltammetric Analyzer3The instrument used to quan-tify the liberated iodine is a voltammetric analyzer equippedwith a three electrode system and a digital or analog output.The
10、 combination electrode system (see Fig. 1) consists of aglassy carbon disc (3-mm diameter) working electrode, aplatinum wire (0.5 mm diameter) auxiliary electrode, and aplatinum wire (0.5 mm diameter) reference electrode. Thevoltammetric analyzer applies a linear voltage ramp (0 to 1 Vrange with res
11、pect to the reference electrode) at a rate of 0.1V/s to the auxiliary electrode. The current output of theworking electrode is converted to voltage by the voltammetricanalyzer, using the gain ratio of 1V/20A. The peak height orpeak area of the voltammetric response to iodine is outputted toan analog
12、 or digital recording device (0 to 1 V full scale).5.2 Vortex Mixer,4with a 2800 to 3000 rpm motor and apad suitable for mixing test tubes and vials.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD
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