GB 1886.40-2015 English PDF (GB1886.40-2015)

This standard applies to the food additive L-malic acid, which is produced by enzyme engineering and fermentation methods. 2 Chemical name, molecular formula, structural formula, relative molecular mass 2.1 Chemical name L-hydroxysuccinic acid 2.2 Molecular formula C4H6O5 2.3 Structural formula 2.4 Relative molecular mass 134.09 (according to 2007 international relative atomic mass) 3 Technical requirements 3.1 Sensory requirements Sensory requirements shall comply with Table 1. Table 1 -- Sensory requirements Item Requirements Inspection methods Color White Take an appropriate amount of specimen and place it in a clean, dry white porcelain plate. Observe its color and state under natural light. Smell its odor State Crystal or crystalline powder Odor Special sour smell 3.2 Physical and chemical indicators GB 1886.40-2015 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 5 of 14 The physical and chemical indicators shall comply with the provisions of Table 2. Table 2 -- Physical and chemical indicators Item Indicators Inspection methods L-malic acid (C4H6O5) content, w/% ¡Ý 99.0 A.4 in Appendix A Specific optical rotation ¦Ám (20 ¡ãC, D)/[(¡ã)¡¤dm2¡¤kg-1] -1.6 ~ -2.6 A.5 in Appendix A Ignition residue, w/% ¡Ü 0.10 A.6 in Appendix A Clarity Pass the test A.7 in Appendix A Sulfate (calculated as SO4), w/% ¡Ü 0.02 A.8 in Appendix A Chloride (calculated as Cl), w/% ¡Ü 0.004 A.9 in Appendix A Fumaric acid, w/% ¡Ü 0.5 A.10 in Appendix A Maleic acid, w/% ¡Ü 0.05 Heavy metals (calculated as Pb)/(mg/kg) ¡Ü 10.0 GB 5009.74 Arsenic (As)/(mg/kg) ¡Ü 2.0 GB 5009.76 Lead (Pb)/(mg/kg) ¡Ü 2.0 GB 5009.75 GB 1886.40-2015 www.ChineseStandard.net ? Buy True-PDF ? Auto-delivery. Page 6 of 14 Appendix A Testing method A.1 Warning Some test procedures specified in the test methods may lead to hazardous situations. Operators shall take appropriate safety and health measures. A.2 General provisions Unless other requirements are specified, the reagents and water used in this standard refer ...