甲壳素色谱柱富集－柱前显色快速分光光度法　Ⅶ．环境水样中痕量铝的测定

Preconcentraion by Use of a Chromatographic Column of Chitin-Pre-column Color Reaction Rapid Spectrophotometry Ⅶ. Determination of Trace Aluminium in Environmental Samples

研究了用甲壳素富集铬天菁Ｓ－Ａｌ的柱前显色分光光度法。在酸性条件下，甲壳素吸附铬天菁Ｓ和铝的络阴离子，其富集倍数高达１００倍。经用ＮＨ＿３·Ｈ＿２Ｏ、ＨＡｃ和丙酮依次洗脱并定容后，在５４５ｎｍ处测定显色溶液吸光度，线性范围在０～１ｍｇ／ＬＡｌ。方法快速，可以用于环境水样中痕量Ａｌ的测定。

Preconcentration by collecting aluminium-chromazurol S chelate on a chromatographic column of chitin has been applied to the spectrophotometric determination of aluminium in water.The chelate on chitin is eluted with ammonia-ethyl alcohol-acetone and the absorbance of the eluate is measured at 545 nm. Beer's law is obeyed over the concentration range 0～10 μg of aluminium in 10 mL of eluate.