原子荧光分析环境样品中汞荧光值漂移问题探讨

A Discussion on the Drift of Mercury Fluorescence Values in Environmental Sample Analysis by Atomic Fluorescence Spectrometry

实验发现,原子荧光汞荧光值漂移,可以通过去除实验器皿中汞污染和规避光漫反射缓解。实验器皿中汞污染会缓慢吸附于仪器管路,造成汞荧光值增强,使用强还原剂氯化亚锡浸泡0.5h,可以完全有效去除汞污染。原子化器高度优化调整至13cm,可以有效规避光的漫反射干扰,光的漫反射干扰会放大汞的信号波动,导致汞荧光值精密性变差。

Through experiments and research,it is found that the drift of mercuryfluorescence values in atomicfluorescence spectrometry can be relieved by wiping offcontaminated mercury on laboratory vessels and avoiding light diffuse reflection to happen.As the contaminated mercury may slowly be adhered to instrumental pipeline resulting in an enhancement of mercuryfluorescence values,immersion in strong reducing agent stannous chloride for half an hour can completely and effectively eliminate the contaminated mercury.On account of the light diffuse reflection may magnify thefluctuation of mercury signals to give rise to poor precision of the mercuryfluorescence values,adjusting the atomizer to 13 cm in height can effectively avoid such interference.