催化动力学分光光度法测定水中痕量铝
Determination of Trace Aluminum in Water by Catalytic Kinetic Spectrophotometry
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摘要:
目的 建立测定痕量铝的测定方法。 方法 利用分光光度计记录沸水浴中Al3+ 催化KBrO3 氧化甲基红褪色前后的光密度。 结果 方法的线性范围为40~800 μg/L,线性相关系数r= 0.998 9,检出限为8.0 μg/L。 结论 建立了测定水中痕量铝的简单、灵敏、准确的催化动力学分光光度法。 Abstract:Objective To establish a solution to determination of trace aluminum. Methods A spectrophotomer was used to record before-and-after absorbances of an oxidative fading reaction of methyl red by potassium bromate catalyzed by aluminum in boiling water bath. Results The linear range of the proposed method was 40-800 μg/L, the correlation coefficient (r) was 0.998 9, and the detection limit was 8.0 μg/L. Conclusion A simple, sensitive and accurate catalytic kinetic spectrophotometric method for aluminum determination in water is established.
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