原子吸收光度计兼FIA光度法测定沉积物中铝

摘 要 自行研制了一套流动注射比色装置，应用到原子吸收分光光度计上，采用锐线光源的原子吸收分光光度计兼作流动注射分析法中可见光度计使用，研究了沉积物样品中微量铝测定的适宜条件，建立了一种全新的分析测试技术。一次进样同时可连续得到三峰两谷5个吸光度值（A₁, A₂, A₃, A₄, A₅），均可用于定量分析，并对其理论和实验技术进行了讨论。采用加和技术（A=A₁+A₂+A₃+A₄+A₅）是提高FIA法分析灵敏度的一种有效途径，该方法的灵敏度较普通方法有显著提高，其精密度和线性关系也良好。实验表明，原子吸收分光光度计兼作可见光度计使用，扩大了原子吸收分光光度计的应用范围，操作简单，方法可靠，直接用于沉积物样品中微量铝含量的测定，结果令人满意。

Determination of Aluminum in Sediments by Atomic Absorption Spectrophotometer without FIA Spectrophotometric Analysis

To search for a new method of determining,we developed a new flow injection analyzer,applied to the atomic absorption spectrophotometer,relying on it without flame in place of visible spectrophotometer,and studied the appropriate condition for the determination of aluminum in sediments,thus built up a kind of new analytical test technique.Three peak and two valley absorption values(A1,A2, A3,A4 and A5) can be continuously obtained simultaneously that all can be used for quantitative analysis,then we discussed its theory and experiment technique.Based on the additivity of absorbance(A=A1 A2 A3 A4 A5),the sensitivity of FIA is enhanced,and its precision and linear relation are also good,raising the efficiency of AAS.The simple method has been applied to determining Al in sediments,and the results are satisfactory.