原子吸收法测定环境水样,通常是将样品与标准参比物质作比较来完成的。因此,在测定时,则要求环境水样与标准参比物质的基体尽可能相匹配,使它们在火焰中具有相同的原子化效率,以保证测定结果的准确性。然而在实际分析中,由于环境水样中的共存离子、粘度、表面张力、比重等因素的影响,要使得与标准参比物质基体完全匹配的环境水样是比较困难的。因此,在分析测定中,所得环境水样的分析结果往往偏高或偏低。为此,本文介绍一种消除基体干 Atomic absorption method for the determination of environmental water samples, the sample is usually compared with the standard reference substance to complete. Therefore, in the determination, it is required that the environmental water sample and the standard reference substance matrix match as much as possible so that they have the same atomization efficiency in the flame, so as to ensure the accuracy of the determination result. However, in practical analysis, due to the coexistence of ions in the environmental water samples, viscosity, surface tension, specific gravity and other factors, to make the standard reference material matrix to exactly match the water environment is more difficult. Therefore, in the analysis and determination, the results of the analysis of the resulting environmental water samples tend to be high or low. To this end, this article describes a way to eliminate matrix dryness