Formerly under the jurisdiction of Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, these test methods were withdrawn in November 2021. This standard is being withdrawn without replacement. Test Methods D1091 was originally developed in 1950 when there were few approaches for the determination of phosphorus in petroleum products. Since that time, instrumental methods have been developed for the determination of phosphorus in petroleum products, for example, Test Methods D4951, D5185, and D6481. It is the judgement of the D02.03 officers that this method is no longer needed and could not be revised to comply with the negative voter’s request without a new interlaboratory study, which would be difficult to get the required participation.
Значение и использование4.1 Knowledge of the phosphorus content, and thus the phosphorus-containing additives, in a lubricating oil or additive can be used to predict performance characteristics. This test method is suitable for most applications requiring the determination of phosphorus.
1.1 These test methods cover the determination of phosphorus in unused lubricating oils and lubricating oil additives and their concentrates. The test methods are not restricted with respect to the type of phosphorus compounds that may be present—for example, trivalent or pentavalent phosphorus compounds, phosphines, phosphates, phosphonates, phosphorus sulfides, and so forth—since all are quantitatively converted to an aqueous solution of orthophosphate ion by oxidation of the sample during the course of analysis.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.