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硒是高纯铜中一项重要指标。纯铜中痕量硒的测定已受到分析工作者的重视。氢化物发生原子荧光光谱法是测定痕量硒的最为有效的分析方法之一,广泛应用于冶金、地质、环保、卫生等领域。该法存在的主要问题是某些元素(铜、银)的干扰较为严重,因而对纯铜中痕量硒的测定还存在一定困难。文献[3]报道用Fe(OH)_3共沉淀硒使之与大量铜分离,取得较好效果。本文提出用8-羟基喹啉沉淀分离基体铜,用氢化物发生原子荧光光谱法测定滤液中硒的方法。该沉淀体系能在较宽的酸度范围内使铜沉淀完全,并能使大多数共存元素与硒分离,且对硒的吸附很少。本法操作较简便快速,选择性好,加标回收达92%～98%。应用于纯铜中痕量硒的测定,获得满意结果。
Selenium is an important indicator of high purity copper. The determination of trace selenium in pure copper has received the attention of analysts. Hydride Generation-Atomic Fluorescence Spectrometry is one of the most effective analytical methods for the determination of trace selenium, which is widely used in metallurgy, geology, environmental protection, health and other fields. The main problem with this method is that the interference of some elements (copper and silver) is more serious, so there are still some difficulties in the determination of trace selenium in pure copper. Literature [3] reported that Fe (OH) _3 coprecipitated selenium with a large number of copper separation, and achieved good results. In this paper, a method for the determination of selenium in the filtrate by hydride generation atomic fluorescence spectrometry was proposed. The precipitation system can precipitate copper completely within a wide range of acidity, and can separate most of the coexisting elements from selenium with little selenium adsorption. This method is more simple and quick operation, good selectivity, spike recovery of 92% to 98%. Applied to the determination of trace amounts of selenium in copper to obtain satisfactory results.