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原子吸收光谱法测定球墨铸铁中的镁,具有快速、准确的优点,文献报导较多。但一般在溶解试样和消除干扰元素等方面,步骤较烦,且费时。为此,我们在文献的基础上,采用电解法加速溶样;添加锶盐作释放剂以消除硅、铝等元素的干扰,从而制订了球墨铸铁中镁的快速、准确的测定方法。装置和试剂 (一)电解溶样装置电解溶样是采用将电流通过被腐蚀介质所包围的分析试样(作阳极)以加速其溶解,从而达到快速溶样的目的。采用电解方法溶样在化学分析中早有应用。Jones用原子吸收光谱法测定
Atomic absorption spectrophotometry for the determination of magnesium in nodular cast iron has the advantages of rapid and accurate, and has been widely reported in the literature. However, generally in the dissolution of the sample and eliminate interference elements, the steps more annoying, and time-consuming. For this reason, based on the literature, we use electrolysis to accelerate the dissolution of samples; strontium salt as a releasing agent to eliminate the interference of silicon, aluminum and other elements, so as to formulate a rapid and accurate determination method of magnesium in nodular cast iron. Devices and Reagents (1) Electrolytic Dissolving Device Electrolytic dissolving is to dissolve the current through the analytical sample (anode) surrounded by the corrosive medium so as to achieve the purpose of rapid sample dissolution. The use of electrolysis method for chemical analysis has long been the application. Jones is determined by atomic absorption spectrometry