GB/T 46422-2025 Active National standards

GB/T 46422-2025 Petroleum products and other liquids—Determination of total acidity in ethanol—Potentiometric titration method

Publish Date: 2025-10-05 Implement Date: 2026-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 46422-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Petroleum products

ICS Name: Integrated oil products

Publish Date: 2025-10-05

Implement Date: 2026-05-01

Pages: 16 pages

Scope

This document describes the test method for determining the total acid value and acid value in ethanol and fuel ethanol using potentiometric titration.
This document is applicable to ethanol and fuel ethanol with a volume fraction greater than 51%. Method A in this document is used to directly determine the total acid value, which is suitable for determining the acid value of general samples; Method B is used to determine the acid value after nitrogen purification, which is suitable for determining the total acid value of samples with an acid value less than 20 mg/L.
Note: To avoid the influence of carbon dioxide dissolved in the sample on the results, Method B uses nitrogen to purify the sample.