论文部分内容阅读
在光谱化学分析中,尤其是分析难熔物质如锆、铪、铌、钽、铀、钍、钨、钼以及稀土等试样时,普遍使用载体来提高分析灵敏度和准确度。AgCl是典型的卤化物类型载体,它的主要作用是使样品中杂质元素转变为较易挥发的氯化物促进杂质的蒸发。张功杼系统地研究过各种氯化物载体,认为AgCl的作用为最好。中岛曾研究各种载体对ZrO_2、ThO_2中杂质谱线的影响,实验结果表明:AgCl的载体效果不仅比其它各种卤化物好,甚至也比氧化物类型的GaO_3更为优越。AgCl还有增强稀土元素谱线的效果。AgCl是效果最好的载体之一。光谱载体须是高纯试剂,但高纯AgCl不易获得。迄今为止载体用的AgCl由直接沉淀法制备。这种方法制得的AgCl是凝乳状沉淀,具有较大的吸附与
In spectrochemical chemistry, especially when analyzing samples of refractory materials such as zirconium, hafnium, niobium, tantalum, uranium, thorium, tungsten, molybdenum and rare earths, carriers are commonly used to increase analytical sensitivity and accuracy. AgCl is a typical halide type carrier. Its main function is to convert the impurity elements in the sample to more volatile chlorides to promote the evaporation of impurities. Zhang Gong 杼 systematically studied a variety of chloride carriers, that the role of AgCl is the best. Nakajima studied the influence of various carriers on the impurity spectra in ZrO_2 and ThO_2. The experimental results show that the carrier effect of AgCl is not only superior to other kinds of halides, but also superior to the oxide type GaO_3. AgCl also enhance the effect of rare earth element spectrum. AgCl is one of the best performing carriers. The spectrum carrier must be a high purity reagent, but high purity AgCl is not readily available. AgCl for carriers has hitherto been prepared by direct precipitation. AgCl prepared by this method is a curdled precipitate, with a larger adsorption and