现代分析仪器的发展,促进了环境小极低浓度金属离子的测定,目前可以测定溶液中少至0.01ug/1的金属离子,并得到满意的准确度。测定的最低绝对值是10~(18)-10~(20)g。分析这样低的样品,自然会遇到许多问题.分析误差将与许多不同因素有关,为了得到重现性好的结果,必须仔细考虑样品的制备,样品的处理和分析操作。影响分析准确度的主要因素是试剂的纯度和实验室及工作人员引起的沾污以及仪器的性能。本文将要讨论这些因素的影响。 The development of modern analytical instruments has facilitated the determination of very small concentrations of metal ions in the environment, and currently as little as 0.01 ug / 1 of metal ions in solution can be measured with satisfactory accuracy. The lowest absolute value of determination is 10 ~ (18) -10 ~ (20) g. Analysis of such low samples will naturally encounter many problems, and the analytical errors will depend on many different factors, and in order to obtain reproducible results, careful consideration must be given to sample preparation, sample handling and analysis. The main factors that influence the accuracy of the analysis are the purity of reagents and laboratory and staff-induced contamination as well as the performance of the instrument. This article will discuss the impact of these factors.