孙美霓. 痕量铝测定的直接比色法[J]. 工程科学学报, 1990, 12(4): 396-401. DOI: 10.13374/j.issn1001-053x.1990.04.032
引用本文: 孙美霓. 痕量铝测定的直接比色法[J]. 工程科学学报, 1990, 12(4): 396-401. DOI: 10.13374/j.issn1001-053x.1990.04.032
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Sun Meini. Determination of Trace Amount of Al by Using Direct Spectrophtometric Method[J]. Chinese Journal of Engineering, 1990, 12(4): 396-401. DOI: 10.13374/j.issn1001-053x.1990.04.032
Citation: Sun Meini. Determination of Trace Amount of Al by Using Direct Spectrophtometric Method[J]. Chinese Journal of Engineering, 1990, 12(4): 396-401. DOI: 10.13374/j.issn1001-053x.1990.04.032
shu

痕量铝测定的直接比色法

Determination of Trace Amount of Al by Using Direct Spectrophtometric Method

    摘要
  • 摘要: 分取25mg试样,铁用抗坏血酸还原,不经分离,直接用铬天青S显色进行测定。借6次甲基四胺及盐酸的缓冲作用,把溶液的pH控制在5.0±0.3,铝与铬天青S生成紫红色络合物,最大吸收波长为550μm。

     

    Abstract: The Trace amount of Al within the range of 0.004%~0.020% in the low alloy steel was determined by using a spectrophtometric method. Iron in the sample (25 mg) was reduced by ascorbic acid without separation. The absorptance of red complex of Al with chromazurols in a buffer solution pH 5.0±0.3 was measured at 550μm.

     

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