ASTM D7843 - 12

    Standard Test Method for Measurement of Lubricant Generated Insoluble Color Bodies in In-Service Turbine Oils using Membrane Patch Colorimetry

    Active Standard ASTM D7843 | Developed by Subcommittee: D02.C0

    Book of Standards Volume: 05.04


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    Significance and Use

    5.1 This test can be a guide to end-users on the formation of lubricant-generated, insoluble deposits.

    5.2 The results from this test are intended to be used as a condition monitoring trending tool as part of a comprehensive program, as outlined in standards such as Practice D4378.

    1. Scope

    1.1 This test method extracts insoluble contaminants from a sample of in-service turbine oil onto a patch and the color of the membrane patch is analyzed by a spectrophotometer. The results are reported as a ΔE value, within the CIE LAB scale.

    1.2 This test method is not appropriate for turbine oils with dyes.

    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.


    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

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D4378 Practice for In-Service Monitoring of Mineral Turbine Oils for Steam and Gas Turbines

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E284 Terminology of Appearance

    E308 Practice for Computing the Colors of Objects by Using the CIE System

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method


    ICS Code

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

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D7843-12

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