This method is for the determination of the flash point of petroleum products in the temperature range from 40 to 360°C using a Pensky-Martens closed-up apparatus. These test methods are applicable for the detection of contamination of relatively nonvolatile or nonflammable materials with volatile or flammable materials.
The method can be used for flash point determinations above 250°C but the precision has not been determined above that temperature. Precisions have not been determined for residual fuels for flash points above 100°C. The precision of in-use lubricating oils has not been determined. Some specifictions state a D93 minimum flash point below 40°C, however, the precision has not been determined below this temperature.
Procedure A is applicable to distillate fuels (diesel, biodiesel blends, kerosene, heating oil, turbine fuels), new and in-use lubricating oils, and other homogeneous petroluem liquids not included in the scope of Procedure B or C.
Procedure B is applicable to residual fuel oils, cutback residue, used lubricating oils, mixtures of petroleum liquids with solids, petroleum liquids that tend to form a surface film under test conditions, or are petroleum liquids of such kinematic viscosity that they are not uniformly heated under the stirring and heating conditions of Procedure A.
Procdure C is applicable to biodesel (B100). Since a flash point of residual alcohol in biodiesel is difficult to observe by manual flash point techniques, automated apparatus with electronic flas point detection have been found suitable.
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|Hold Times, Preservatives, Preps, Collection, Analytical & Documentation|
|Holding Time:||None specified in the method.|
|Preservatives:||None specified in the method.|
|Collection Method:||Grab sampling|
|Analytical Methodology:||Closed-cup apparatus|
|Analyte||Formula||CAS Number||Detection Limit|
* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.
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