GB/T 30921.6-2025 Active National standards

GB/T 30921.6-2025 Test methods of purified terephthalic acid(PTA) for industrial use—Part 6:Determination of particle size distribution

GB/T 30921.6-2025 Test methods of purified terephthalic acid(PTA) for industrial use—Part 6:Determination of particle size distribution

Publish Date: 2025-12-02 Implement Date: 2026-07-01 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 30921.6-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Basic organic chemical raw materials

ICS Name: Organic acids

Publish Date: 2025-12-02

Implement Date: 2026-07-01

Pages: 16 pages

Scope

This document describes the air jet sieving method, laser diffraction method, and dynamic image method for determining the particle size distribution of industrial-grade terephthalic acid (PTA) samples.
The scope of application of this document is as follows:
—— The air jet sieving method is suitable for determining the particle size distribution of PTA samples with a range of 10μm to 4000μm;
—— The laser diffraction method is suitable for determining the particle size distribution of PTA samples with a range of 1μm to 2000μm;
—— The dynamic image method is suitable for determining the particle size distribution of PTA samples with a range of 0.8μm to 5000μm.

Development Information

Word Count: 21 Thousand words Pages: 16 pages

Same series standard

GB/T 30921.5-2025 Test methods of purified terephthalic acid(PTA) for industrial use—Part 5:Determination of acid number

Replace the following standards

GB/T 30921.6-2016 Test method of purified terephthalic acid(PTA) for industrial use—Part 6:Determination of particle size distribution

Referenced Standards

GB/T 3723-1999 Sampling of chemical products for industrial use—Safety in sampling GB/T 6679-2003 General rules for sampling solid chemical products GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 19077-2016 Particle size analysis—Laser diffraction methods GB/T 19077-2024 Particle size analysis—Laser diffraction methods GB/T 19077.1-2003 Particle size analysis—Laser diffraction method GB/T 19077.1-2008 Particle size analysis—Laser diffraction methods—Part 1:General principles GB/T 21649.2-2017 Particle size analysis—Image analysis methods—Part 2:Dynamic image analysis methods GB/T 21649.2-2025 Particle size analysis—Image analysis methods—Part 2:Dynamic image analysis methods

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