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由于海水的成分复杂,含盐量高,给用石墨炉直接测定其中的痕量杂质带来许多困难。Sturgeon等用预先分离的方法来克服干扰。为了进行直接测定,研究海水背景吸收的来源、特点和消除方法是重要的。海水背景吸收的波长特性和在石墨管内蒸发行为的研究表明,海水的背景吸收主要来自氯化钠。时间特性的研究表明,背景吸收的时间分布及背景峰高与原子化阶段的加热方式和原子化温度有关。作者还研究了基体改进。剂和其它减小背景吸收的方法。
Due to the complex composition of the seawater and the high salt content, it is difficult to directly measure the trace impurities in graphite furnaces. Sturgeon and others use pre-separation methods to overcome the interference. For direct measurements, it is important to study the sources, characteristics and elimination of background absorption of seawater. Wavelength characteristics of seawater background absorption and evaporation behavior in graphite tubes indicate that the background absorption of seawater mainly comes from sodium chloride. The study of time characteristics shows that the time distribution of background absorption and the background peak height are related to the heating method and atomization temperature in the atomization phase. The author also studied the matrix improvement. Agents and other methods of reducing background absorption.