SN/T 0860-2016 in English

Analysis of the core content of the standard

Method Principle and Technological Evolution

This standard replaces SN/T 0860-2000. Major improvements include: 1) adding atomic fluorescence spectrometry as the first method; 2) optimizing the sample pretreatment process; and 3) expanding applicable categories to eight food categories. When using an atomic fluorescence spectrometer, selenium generates SeH₂ in a hydride generation system, which is then atomized and the fluorescence intensity is measured.

Key Reagent Preparation Specifications

Key Implementation Tips

1. Sample grinding requires titanium alloy grinding equipment to avoid metal contamination
2. The digestion process temperature gradient was controlled as follows: 120°C (5 min) → 160°C (5 min) → 195°C (15 min)
3. The carrier gas flow rate for atomic fluorescence spectrometry was optimized to 1.05 L/min, and the observation height was set to 8 mm

Method Validation Data

The spiked recoveries for eight matrices showed recoveries of 76.2%-124.4% for aquatic products at a spiked level of 25 μg/kg, and 101.3%-105.0% for grains at a spiked level of 500 μg/kg. Precision test RSDs were all <15%, meeting the requirements of GB/T 27404-2008.