粮食级的凝胶"哈拉"核证的

Tests Content Ref. Method Specification Appearance China GB Pale yellow granule or powder with no objetional odor and taste Solubility China GB Insoluble in normal water but swells and softens when immersed in it,gradually absorbing from 5 to10 mins its own weight; soluble in hot water (>40); insoluble in most organic solvents. Identification China GB A violet colour is produced with Copper Sulphate and Sodium Hydroxide solution.On cooling the solution to 0, the contents do not immediately flow out. Clarity and China GB Solution A is not more opalescent than opalescence standard QS4,and Colour of solution not more intensely coloured than reference solution YS4. Gel Strength China GB 80g to 260g Viscosity China GB 30 to 52 mps PH China GB 5.5 to 7.0 Loss on China GB Not more than 14%