If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    ASTM D6144 - 17

    Standard Test Method for Analysis of AMS (α-Methylstyrene) by Capillary Gas Chromatography

    Active Standard ASTM D6144 | Developed by Subcommittee: D16.07

    Book of Standards Volume: 06.04

      Format Pages Price  
    PDF 5 $52.00   ADD TO CART
    Hardcopy (shipping and handling) 5 $52.00   ADD TO CART
    Standard + Redline PDF Bundle 10 $62.00   ADD TO CART

    Historical Version(s) - view previous versions of standard

    Work Item(s) - proposed revisions of this standard

    Translated Version(s): Russian

    ASTM License Agreement

    Shipping & Handling

    More D16.07 Standards Related Products Standard References

    Significance and Use

    5.1 This test method is suitable for setting specifications on the materials referenced in 1.2 and for use as an internal quality control tool where AMS is produced or is used in a manufacturing process. It may also be used in development or research work involving AMS.

    5.2 This test method is useful in determining the purity of AMS with normal impurities present. If extremely high boiling or unusual impurities are present in the AMS, this test method would not necessarily detect them and the purity calculation would be erroneous.

    1. Scope

    1.1 This test method covers the determination of the purity of AMS (α-methylstyrene) by gas chromatography. Calibration of the gas chromatography system is done by the external standard calibration technique.

    1.2 This test method has been found applicable to the measurement of impurities such as cumene, 3-methyl-2-cyclopentene-1-one, n-propylbenzene, tert-butylbenzene, sec-butylbenzene, cis-2-phenyl-2-butene, acetophenone, 1-phenyl-1-butene, 2-phenyl-2-propanol, trans-2-phenyl-2-butene, m-cymene, p-cymene, and phenol, which are common to the manufacturing process of AMS. The method has also been found applicable for the determination of para-tertiary-butylcatechol typically added as a stabilizer to AMS. The impurities in AMS can be analyzed over a range of 5 to 800 mg/kg by this method. (See Table 1.) The limit of quantitation for these these impurities averages 4 mg/kg, while the limit of detection averages 1.2 mg/kg. (See Table 1.)

    TABLE 1 Summary of Precision Data (mg/kg)


    Repeatability (r)

    Reproducibility (R)

    Range Studied






    1.61 + 0.035*Acetone

    0.47 + 1.10*Acetone

    0.5 – 26


    −0.46 + 0.031*Cumene

    7.88 + 0.19*Cumene

    45 – 290

    nPropylbenzene (NPB)

    2.11 + 0.03*NPB

    −7.81 + 0.37*NPB

    55 – 195



    3.65 + 0.58*Phenol

    1 – 40

    tertButylbenzene (TBB)

    −1.22 + 0.035*TBB

    3.63 + 0.087*TBB

    150 – 650

    secButylbenzene (SBB)

    4.23 + 0.019*SBB

    21.60 + 0.25*SBB

    200 – 765


    0.31 + 0.035*mCymene

    2.34 + 0.35*mCymene

    2 – 50




    29 – 31




    10 – 18

    cis-2-Phenyl-2-Butene (CPB)

    0.17 + 0.030*CPB

    5.39 + 0.11*CPB

    50 – 225

    trans-2-Phenyl-2-Butene (TPB)


    0.54 + 0.20*TPB

    19 – 70

    1-Phenyl-1-Butene (PB)

    4.00 + 0.018*PB

    0.17 + 0.19*PB

    0.2 – 735

    Acetophenone (AP)

    –1.09 + 0.15*AP

    1.17 + 0.63*AP

    15 – 115

    para-tert-Butylcatechol (PTBC)



    10 – 19

    2-Methylbenzofuran (MBF)

    0.33 + 0.76*MBF

    0.75 + 0.60*MBF

    1 – 2

    2-Phenylpropion aldehyde (PPA)

    0.59 + 0.11*PPA

    0.29 + 0.23*PPA

    1.5 – 15

    α-Methylstyrene Oxide (AMSO)


    6.51 + 0.23*AMSO

    13 – 32

    DimethylBenzyl Alcohol (DMBA)


    0.55 + 2.03*DMBA

    0.1 – 1

    1.3 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29.

    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 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. For specific hazard statements, see Section 8.

    1.6 This international standard was developed in accordance 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

    D3437 Practice for Sampling and Handling Liquid Cyclic Products

    D4307 Practice for Preparation of Liquid Blends for Use as Analytical Standards

    D4790 Terminology of Aromatic Hydrocarbons and Related Chemicals

    D6809 Guide for Quality Control and Quality Assurance Procedures for Aromatic Hydrocarbons and Related Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E355 Practice for Gas Chromatography Terms and Relationships

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

    E1510 Practice for Installing Fused Silica Open Tubular Capillary Columns in Gas Chromatographs

    ICS Code

    ICS Number Code 71.040.50 (Physicochemical methods of analysis)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D6144-17

    Citation Format

    ASTM D6144-17, Standard Test Method for Analysis of AMS (α-Methylstyrene) by Capillary Gas Chromatography, ASTM International, West Conshohocken, PA, 2017, www.astm.org

    Back to Top