GB/T 29024.3-2025 Active National standards

GB/T 29024.3-2025 Determination of particle size distribution—Single particle light interaction methods—Part 3:Light extinction liquid-borne particle counter

Publish Date: 2025-06-30 Implement Date: 2026-01-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 29024.3-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Screening, sieve plates, and sieve nets

ICS Name: Granularity analysis and sieving

Publish Date: 2025-06-30

Implement Date: 2026-01-01

Pages: 20 pages

Scope

This document specifies a method for measuring the size and concentration of particles suspended in liquids using a light-scattering-based liquid particle counter (LELPC). The light-scattering-based liquid particle counter described in this document is based on the measurement of single particles, and the typical particle size range measured by this method is 1 μm to 100 μm. This method is suitable for evaluating the cleanliness of pharmaceuticals (such as injections, water for injections, and intravenous solutions), as well as for measuring the particle concentration and size distribution in various liquids. This document includes the following content: — Error in particle size setting; — Counting efficiency; — Particle size resolution; — Maximum particle concentration; — Sampling flow rate error; — Sampling time error; — Sampling volume error; — Calibration interval; — Test and calibration reports.