【摘要】 <正> 内标法是 ICP 发射光谱分析的方法之一。文献曾报道过向样品及标准溶液中加入等量的内标元素,通过测定分析物与内标的强度比值求含量,可以提高精密度与准确度。选择内标时,要考虑其光谱特性及雾化过程特性与分析物的特性相匹配。但有的研究结果表明,当一个元素的激发能和电离能与分析物有很大差别(甚至分别为原子线及离子线)时,只要适当选择操作条件,使谱线的信号间密切相关,仍可被选作内标。更多还原

【Abstract】 A concentration ratio method applied to the ICP-AES for two synthetic crystals is reported. The method has the advantages of improving both accuracy and precision,and consuming less sample.A sample of 2 milligrams is sufficient for a complete analysis with results com- parble to those obtained with a macro sample.Since only the relative solution concentration are to be concerned,there is no need to weigh the initial sample or measure the final volume accurately,thus resulting in the simplification of operation.更多还原