T/YNZJ 013.3-2026 Active Group standards

T/YNZJ 013.3-2026 Determination of Residues of Ethephon and Chlorpyrifos in Tea and its Derivatives and Substitute Teas by Gas Chromatography-Mass Spectrometry

Publish Date: 2026-01-09 Implement Date: 2026-01-09 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: T/YNZJ 013.3-2026

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Technical management

ICS Name: Tea

Publish Date: 2026-01-09

Implement Date: 2026-01-09

Scope

This standard specifies the determination of caffeine and phthalic acid residues in tea and its products and substitute teas using gas chromatography-mass spectrometry. The standard is applicable to the determination of caffeine and phthalic acid in fresh tea leaves, tea, tea-containing products, and substitute teas. Other matrices can be referred to for implementation. The quantitative limit of the standard is 0.01 mg/kg. The standard stipulates the requirements for reagents, consumables, equipment, and data processing, and specifies the main technical contents such as sample pretreatment process and instrument analysis conditions, ensuring the scientificity, standardization, and operability of the method.