GB/T 22259-2025 Active National standards

GB/T 22259-2025 Determination of oxytetracycline in feeds

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

Basic Information

Standard Code: GB/T 22259-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Animal and poultry feed and additives

ICS Name: \nFeeds

Publish Date: 2025-08-01

Implement Date: 2026-02-01

Pages: 16 pages

Scope

This document describes the methods for determining oxytetracycline in feed using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and high-performance liquid chromatography (HPLC). This document is applicable to the determination of oxytetracycline in compound feed, concentrated feed, premixes, additive premixes, feed raw materials, and mixed feed additives. For the LC-MS/MS method, the detection limit is 0.02 mg/kg, and the quantification limit is 0.05 mg/kg. For HPLC, the detection limit for compound feed (except aquatic compound feed), concentrated feed, premixes, and feed raw materials is 1.0 mg/kg, and the quantification limit is 2.0 mg/kg. For aquatic compound feed, the detection limit is 5.0 mg/kg, and the quantification limit is 10.0 mg/kg. For additive premixes and mixed feed additives, the detection limit is 2.5 mg/kg, and the quantification limit is 5.0 mg/kg.