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    ASTM D7996 - 15

    Standard Test Method for Measuring Visible Spectrum of Asphaltenes in Heavy Fuel Oils and Crude Oils by Spectroscopy in a Microfluidic Platform

    Active Standard ASTM D7996 | Developed by Subcommittee: D02.14

    Book of Standards Volume: 05.04

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    Significance and Use

    5.1 This procedure describes a rapid and sensitive method for measuring the visible spectrum of asphaltenes in crude oils and petroleum products containing residual material using a microfluidic technique.

    5.2 The method is sensitive to small changes in concentration of asphaltenes. Therefore, it can be used as a quality control and chain-of-custody check for fuel or crude oil samples.

    5.3 The visible spectrum of asphaltenes obtained using this technique is correlated to the mass concentration of asphaltenes using conventional gravimetric techniques (see X1.3.3).

    5.4 This test method can be used by refiners as well as upstream laboratories. The test is intended for samples with asphaltenes content less than 15 % by mass.

    1. Scope

    1.1 This test method covers the measurement, either in the laboratory or in the field, of visible spectra of asphaltenes and maltenes in gas oil, diesel fuel, fuel oils, residual fuel oils, lubricating oil, bitumen, and crude oil using microfluidics and spectrographic techniques.2

    1.2 These measurements can be related quantitatively to the mass percent of asphaltenes present in the sample.

    1.3 The test method is limited to asphaltene-containing oil with asphaltenes content less than 15 % by mass.

    1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    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 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

    D3279 Test Method for n-Heptane Insolubles

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

    D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products

    D6560 Test Method for Determination of Asphaltenes (Heptane Insolubles) in Crude Petroleum and Petroleum Products

    E275 Practice for Describing and Measuring Performance of Ultraviolet and Visible Spectrophotometers

    ICS Code

    ICS Number Code 75.080 (Petroleum products in general)

    UNSPSC Code

    UNSPSC Code 15101500(Petroleum and distillates)

    Referencing This Standard
    Link Here
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    DOI: 10.1520/D7996-15

    Citation Format

    ASTM D7996-15, Standard Test Method for Measuring Visible Spectrum of Asphaltenes in Heavy Fuel Oils and Crude Oils by Spectroscopy in a Microfluidic Platform, ASTM International, West Conshohocken, PA, 2015, www.astm.org

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