T/GDBIHQDA 0009-2025 Rock sugar (thread method)

Scope

1. Sensory Requirements Single-crystal rock sugar particles should be uniform; multi-crystal rock sugar columns should have no sandy cores at the bottom and no sandy bottoms. Single-crystal rock sugar crystal surfaces should be dry, white, smooth, shiny, and semi-transparent; white rock sugar should be white, semi-transparent, shiny, and dry on the surface; yellow rock sugar should be golden yellow, dry on the surface, and shiny. The aqueous solution of rock sugar should be transparent and free from turbidity, with a sweet taste and no abnormal odor. There should be no obvious black spots or impurities other than the suspension line. 2. Physical and Chemical Requirements 2.1 Physical and Chemical Indicators of Single-Crystal Rock Sugar They should comply with the provisions of Table 1. Table 1: Physical and Chemical Indicators of Single-Crystal Rock Sugar Item Indicator Superior Grade First Grade Second Grade Sucrose content, % ≥ 99.7 99.5 99.4 Reducing sugar content, % ≤ 0.04 0.08 0.12 Dry loss, % ≤ 0.15 0.25 0.30 Electrical conductivity ash content, % ≤ 0.02 0.04 0.06 Color value, IU ≤ 30 60 70 Water-insoluble impurities, mg/kg ≤ 20 30 40 2.2 Physical and Chemical Indicators of Multi-Crystal Rock Sugar - White Rock Sugar They should comply with the provisions of Table 2. Table 2: Physical and Chemical Indicators of Multi-Crystal Rock Sugar - White Rock Sugar Item Indicator Superior Grade First Grade Sucrose content, % ≥ 98.3 97.8 Reducing sugar content, % ≤ 0.50 0.70 Dry loss, % ≤ 1.00 1.40 Electrical conductivity ash content, % ≤ 0.10 0.13 Color value, IU ≥ 200 200 Not soluble in water impurities, mg/kg ≤ 35 60 2.3 Physical and Chemical Indicators of Multi-Crystal Rock Sugar - Yellow Rock Sugar They should comply with the provisions of Table 3. Table 3: Physical and Chemical Indicators of Multi-Crystal Rock Sugar - Yellow Rock Sugar

Development Information

Related Standards