Composition analysis shows that all specifications, except slightly higher content of residual insolubles, meet the requirement as specified for gum arabic in U.

• 定性检验结果，黑荆胶与阿拉伯胶一样均含有钙盐，不含淀粉、糊精、单宁、果胶、蔗糖及铜、铁、钾等金属离子。