论文部分内容阅读
本文用盐酸及过氧化氢分解试样,在 pH5.5～5.8乙酸-乙酸钠缓冲溶液中,使铝与铬天青 S 形成紫红色络合物,进行光度测定。Fe~(3+)的干扰以抗坏血酸还原,基体锌的干扰可在标准中加入试样等量的锌加以克服,其它杂质元素不干扰测定。本法具有快速、准确的优点。主要试剂:乙酸-乙酸钠缓冲液:每升溶液中含300克无水乙酸钠和50毫升冰乙酸;锌溶液:称取
In this paper, hydrochloric acid and hydrogen peroxide decomposition of the sample, in pH5.5 ~ 5.8 acetic acid - sodium acetate buffer solution, the aluminum and chrome azure S to form purple complex, photometric determination. Fe ~ (3 +) interference with ascorbic acid reduction, the matrix of zinc interference can be added to the standard amount of sample zinc to overcome, other impurities do not interfere with the determination. This law has the advantages of speedy and accurate. The main reagent: acetic acid - sodium acetate buffer: per liter of solution containing 300 grams of anhydrous sodium acetate and 50 ml glacial acetic acid; zinc solution: Weigh