GB 29209-2012 English PDF (GB29209-2012)

This standard applies to food additive sodium sulfate produced from raw materials such as mirabilite. 2 Chemical name, molecular formula, and relative molecular mass 2.1 Chemical name Anhydrous sodium sulfate Sodium sulfate decahydrate 2.2 Molecular formula Anhydrous sodium sulfate: Na2SO4 Sodium sulfate decahydrate: Na2SO4 ? 10H2O 2.3 Relative molecular mass Anhydrous sodium sulfate: 142.04 (according to the 2007 International Relative Atomic Mass) Sodium sulfate decahydrate: 322.20 (according to the 2007 International Relative Atomic Mass) 3 Technical requirements 3.1 Sensory requirements Sensory requirements shall meet the requirements in Table 1. GB 29209-2012 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery Page 4 of 11 Table 1 -- Sensory requirements Item Requirements Testing method Anhydrous sodium sulfate Sodium sulfate decahydrate Color Colorless or white Colorless transparent or white translucent Take an appropriate amount of sample and place it in a 50 mL beaker, observe the color and state under natural light State Crystalline particle or powder Uniform granular crystal 3.2 Physiochemical indexes The physiochemical indexes shall meet the requirements in Table 2. Table 2 -- Physiochemical indexes Item Index Testing method Sodium sulfate (Na2SO4) content (by the dry basis), w/% 99.0~100.5 A.4 in Appendix A Lead (Pb)/(mg/kg) ¡Ü 2 A.5 in Appendix A Selenium (Se)/(mg/kg) ¡Ü 30 A.6 in Appendix A Arsenic (As)/(mg/kg) ¡Ü 3 GB/T 5009.76 Loss on drying, w/% Anhydrous sodium sulfate ¡Ü 1.0 A.7 in Appendix A Sodium sulfate decahydrate 51.0~57.0 GB 29209-2012 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery Page 5 of 11 Appendix A Testing method A.1 Warning Some of the reagents used in the test methods of this standard are toxic or corrosive, and appropriate safety and protective measures shall be taken during operation. A.2 General provisions Unless otherwise specified, the reagents and water used in this standard refer to analytical reagents an...