ASTM D3524-14(R2020) pdf free download
ASTM D3524-14(R2020) pdf free download.Standard Test Method for Diesel Fuel Diluent in Used Diesel Engine Oils by Gas Chromatography
1. Scope
1.1 This test method covers the use of gas chromatography to determine the amount of diesel fuel in used engine lubricat- ing oil. This test is limited to SAE 30 oil. The diesel fuel diluent is analyzed at concentrations up to 12 % by mass. NOTE 1- -This test method may be applicable to higher viscosity grade oils. However, such oils were not included in the program used to develop the precision statement. 1.2 This test method is limited to gas chromatographs equipped with flame ionization detectors and temperature programmable ovens. NOTE 2- -The use of other detectors and instrumentation has been reported. However, the precision statement applies only when the instru- mentation specified is employed. 1.3 There is some overlap of the boiling ranges of diesel fuel and SAE 30 engine oils. Moreover, the boiling range of SAE 30 oils from various sources can vary appreciably. As a result, the calibration can be altered by as much as 2 %，in terms of fuel dilution. When testing unknown or mixed brands of used engine oil, it should be realized that the precision of the method may be poorer than the precision obtained when calibrating with a new oil representative of the used oil being tested. 1.4 The values stated in SI units are to be regarded as the standard. The values stated in inch-pound units are for infor- mation only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability of regulatory requirements prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom-mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
6. Apparatus
6.1 Gas Chromatograph- Any gas chromatograph can be used that has the following performance characteristics: 6.1.1 Detector- A flame ionization detector is used. The detector must have sufficient sensitivity to detect 1.0 % decane with a peak height of at least 10 % of full scale on the data acquisition device under the conditions prescribed in this method. Follow the directions given in Practice E594. When operating at this sensitivity level, detector stability must be such that a baseline drift of not more than 1 % full scale per hour is obtained. The detector must be capable of operating continuously at a temperature equivalent to the maximum column temperature employed. Connection of the column to the detector must be such that no temperature zones exist below the column temperature (cold spots). Although thermal conductivity detectors have been used for this test, their use is not recommended. NorE 3- -It is not desirable to operate a thermal conductivity detector at a temperature 5 °C to 10 °C higher than the maximum column tempera- ture employed. Operation at higher temperature generally contributes to higher noise levels and greater drift, and can also shorten the useful life of the detector. 6.1.2 Column Temperature Programmer- -The chromato- graph must be capable of linear programmed temperature operation over a range suficient to establish a retention time of at least 1 min for the initial peak(s) and to elute the entire : sample before reaching the upper end of the temperature program. The programming rate must be sufficiently reproduc- ible to obtain retention time repeatability of 0.1 min (6 s) for each component in the calibration mixture described in 7.8.
