ASTM D3943 - 10

    Standard Test Method for Total Molybdenum in Fresh Alumina-Base Catalysts

    Active Standard ASTM D3943 | Developed by Subcommittee: D32.03

    Book of Standards Volume: 05.05


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    ASTM D3943

    Significance and Use

    This test method sets forth a procedure by which catalyst samples can be compared either on an interlaboratory or intralaboratory basis. It is anticipated that catalyst producers and users will find this method of value.

    1. Scope

    1.1 This test method covers the determination of molybdenum in alumina-base catalysts and has been cooperatively tested at molybdenum concentrations from 8 to 18 weight %, expressed as MoO3. Any component of the catalyst other than molybdenum such as iron, tungsten, etc., which is capable of being oxidized by either ferric or ceric ions after being passed through a zinc-amalgam reductor column (Jones reductor) will interfere.

    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.


    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

    D1193 Specification for Reagent Water

    D7442 Practice for Sample Preparation of Fluid Catalytic Cracking Catalysts and Zeolites for Elemental Analysis by Inductively Coupled Plasma Atomic Emission Spectroscopy

    E173 Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals

    E507 Test Method for Determination of Aluminum in Iron Ores by Flame Atomic Absorption Spectrometry


    ICS Code

    ICS Number Code 71.040.30 (Chemical reagents)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/D3943-10

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