1Key Takeaways
This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric aci…
2Scope / Description
This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the presence of sulphuric acid, followed by iodometric determination of the potassium permanganate remaining. - ISO 1389, Parts 1 to 11, replace ISO Recommendation R 1389-1970.
6Frequently Asked Questions
What is ISO 1389-9:1977?
ISO 1389-9:1977 — Phthalic anhydride for industrial use; Methods of test; Part IX : Determination of impurities oxidizable in the cold by potassium permanganate; Iodometric method is an international standard developed by International Organization for Standardization (ISO). This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard...
What does ISO 1389-9:1977 cover?
This standard covers: This method is not specific for maleic anhydride. The polarographic method specified in part 7 should be used. The principle is based on the oxidation of unsaturated organic acids and anhydrides in a test portion with an excess of cold standard volumetric potassium permanganate solution in the...
Who should use this standard?
This standard is intended for organizations, professionals, and stakeholders involved in various industries and sectors. It is applicable to manufacturers, service providers, regulatory bodies, and certification organizations.
What is the latest version of ISO 1389-9:1977?
The current published version is ISO 1389-9:1977, published on 1977-02. Always check for amendments or pending revisions.
How do I purchase ISO 1389-9:1977?
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