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在PH4～6的弱酸性介质中,Al~(3+)铬天青S生成紫红色络合物。刺梨中少量的Fe~(3+)和Cu~(2+)用抗坏血酸和硫脲掩蔽。铝含量在0～25μg/25ml范围内遵守比尔定律。适用于刺梨中微量铝的测定。
In PH4 ~ 6 weak acid medium, Al ~ (3 +) chroma of cyanine S produces purple complex. Prickly pear Fe 3+ and Cu 2+ were masked with ascorbic acid and thiourea. Beer’s law is obeyed for aluminum content in the range of 0-25 μg / 25 ml. Suitable for determination of trace aluminum in Rosa roxburghii.