ASTM D7419 - 18

    Standard Test Method for Determination of Total Aromatics and Total Saturates in Lube Basestocks by High Performance Liquid Chromatography (HPLC) with Refractive Index Detection

    Active Standard ASTM D7419 | Developed by Subcommittee: D02.04.0C

    Book of Standards Volume: 05.04


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    Significance and Use

    5.1 The composition of a lubricating oil has a large effect on the characteristicsand uses of the oil. The determination of saturates, aromatics, and polars is a key analysis of this composition. The characterization of the composition of lubricating oils is important in determining their interchangeability for use in blending etcetera.

    1. Scope

    1.1Â This test method covers the determination of total aromatics and total saturats in additive-free lube basestocks using high performance liquid chromatography (HPLC) with refractive index (RI) detection. This test method is applicable to samples containing total saturates in the concentration range of 74.9 % to 100.0 % by mass and aromatics in the concentration range of 0.0 % to 25.1 % by mass. The precision is expressed in terms of the total saturates.

    1.1.1Â Polar comounds, if present, are combined with the total aromatics. Precision was determined for basestocks with polars content <1.0 % by mass.

    1.2Â This test method includes a relative bias section for total saturates in basestocks based n a Practice D6708 accuracy assessment between Test Method D7419 and Test Method D2007. The derived correlation equation is only applicable for basestocks in the total saturates concentration range from 75.0 % to 100.0 % by mass as measured by Test Method D7419.

    1.2.1Â The applicable range for total saturates by Test Method D2007D2007.

    1.3Â The vlues stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.4Â This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5Â This international standard was developed in accordnce with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2007 Test Method for Characteristic Groups in Rubber Extender and Processing Oils and Other Petroleum-Derived Oils by the Clay-Gel Absorption Chromatographic Method

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D6299 Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance

    D6300 Practice for Determination of Precision and Bias Data for Use in Test Methods for Petroleum Products and Lubricants

    D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material


    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    UNSPSC Code

    UNSPSC Code 15101500(Petroleum and distillates)


    Referencing This Standard
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    DOI: 10.1520/D7419-18

    Citation Format

    ASTM D7419-18, Standard Test Method for Determination of Total Aromatics and Total Saturates in Lube Basestocks by High Performance Liquid Chromatography (HPLC) with Refractive Index Detection, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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