GB 1903.9-2015

National Food Safety Standard Food Nutrition Fortifier Sodium Selenite (English Version)

Standard No.

GB 1903.9-2015

Language

Chinese, Available in English version

Release Date

2016

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB 1903.9-2015

Scope

This standard is applicable to the chemical formula, structural formula and relative molecular mass of selenous acid, oxygen plus 2

Introduction

GB 1903.9-2015 Standard Interpretation

Standard Background and Significance

GB 1903.9-2015 "National Food Safety Standard Food Nutrition Fortifier Sodium Selenite" was issued on November 13, 2015 and officially implemented on May 13, 2016. This standard mainly stipulates the technical requirements, inspection methods and usage specifications of food nutrition fortifiers made from sodium selenite as raw material, aiming to ensure food safety and functionality.

Comparison of standard frameworks

Dimensions	GB 1903.9-2015	Comparison of international standards	Differences in industry requirements
Technical indicators	Sodium selenite content: 96.4%-100.8%	CAC standard: not less than 95%	Some companies have higher internal requirements (such as ≥97%)
Physical and chemical properties	White or slightly red crystals	FAO/WHO recommendation: colorless crystals	Some domestic processes vary greatly
Test method	Titration, colorimetry	HPLC and other advanced methods	National standard has wider applicability

Interpretation of technical requirements for sodium selenite

Sodium selenite is an important food nutrient enhancer, and strict technical indicators are specified in GB 1903.9-2015. Includes:

• Organic requirements: white or slightly red crystals or powder
• Physical and chemical indicators: sodium selenite content (≥96.4%), selenium content (≥44.0%)
• Impurity limits: chloride ≤0.1%, sulfate ≤0.2%

Test methods and practical applications

Appendix A of the standard specifies a variety of test methods in detail, including:

• Determination of sodium selenite content: titration method, quantitative analysis by sodium thiosulfate standard solution.
• Solution clarity and color detection: colorimetric method, refer to turbidity standard No. 2 and orange-red standard solution.

Practical Application Case Analysis

A food company produces functional foods containing sodium selenite in accordance with GB 1903.9-2015, and controls product quality by titration and colorimetry. The case shows:

• Sodium selenite content: average 97.5%
• Solution clarity: meets No. 1 standard

GB 1903.9-2015 Referenced Document

• GB 5009.3 National Food Safety Standard Determination of Moisture in Food*， 2016-08-31 Update
• GB 5009.74 National Food Safety Standards Tests for Limits of Heavy Metals in Food Additives
• GB 5009.76 National Food Safety Standards Determination of Arsenic in Food Additives

GB 1903.9-2015 history

• 2016 GB 1903.9-2015 National Food Safety Standard Food Nutrition Fortifier Sodium Selenite

GB 1903.9-2015 -All Parts