1. Scope

Keywords

Rationale

This is the second ballot for new standard of ‘Standard Test Method for Analysis of Methanol by Gas Chromatography’. According to the minutes of Meeting on Feb 25 2026, it should be revised and submitted for concurrent ballot. ‘Standard Test Method for Analysis of Methanol by Gas Chromatography’ provided a gas chromatography-based method for testing organic impurities in methanol, capable of testing process impurities and shipment contaminants. The first subcommittee ballot D16.14 (26-01) received 2 negative from Scott J Hoy and Stuart R Smith, 4 comments from Duane Miller, Larry N Tucker, Yuhong Zhang, Sippu Patel. The comments were considered persuasive and the standard was revised to incorporate the comments. This draft is for the concurrent ballot. The revision contents are marked in blue. Compared to its previous edition, the main revisions are as follows: (1) ‘External Standard’ was added to the title of standard. (2) The chromatographic conditions, typical chromatogram, precision, limit of detection and data in research report were added or replaced by the result of helium carrier gas condition. (3) The limit of detection (LOD) for ethanol, acetone, methyl acetate and benzene in methanol are provided, based on data in research report under helium carrier gas condition. (4) Numerical resolution requirement was given in chapter 6.2. (5) Requirement and use of equipment setup check sample (8.6) is added. The purpose is to check the retention time, resolution and sensitivity of equipment. (6) Use of methanol (8.4) as blank solution is added. As the peak area of impurities in blank solution is also included in calculation equation. (7) Definition of default response factor for unknown impurities was given by using Rf of isopropanol. (8) Chapter of Precision and Bias was revised in accordance of the D16 editorial requirements. (9) Repeatability of different content levels are added to the text.