原子吸收光谱法是一个简便、快速、准确的分析方法,然而以往的工作重点多放在研究用原子吸收光谱作痕量分析,对于高含量的测定,虽已有一些报导,但还没有成为广泛采用的成熟的惯常分析方法。目前,矿石中大量钙镁的测定多采用EDTA容量法,此法虽不需要贵重的仪器设备,容易推广使用等优点,但很多金属离子如铁、铝、钛、铜、铅、锌、镍、钴、铋、钡、锶等对滴定钙镁有干扰,特别是采用碱熔分解样品而硅的含量较高时,使钙的滴定终点拖后,引起较大的误 Atomic absorption spectrometry is a simple, rapid and accurate method of analysis. However, previous work focused more on the use of atomic absorption spectrometry for trace analysis. Although there have been some reports on the determination of high content, it has not yet become widespread Mature customary analytical methods used. At present, the determination of a large number of calcium and magnesium ore using EDTA capacity method, although this method does not require expensive equipment, easy to promote the use of advantages, but many metal ions such as iron, aluminum, titanium, copper, lead, zinc, Cobalt, bismuth, barium, strontium and other interference on the titration of calcium and magnesium, especially the use of alkali melting sample decomposition and the high content of silicon, the end of the titration of calcium drag, causing a greater error