测定汞的原子荧光法和冷原子吸收法比对研究

Comparison between measuring mercury in water with atomic fluorescence spectrometry and cold atomic absorption spectrometry

从监测方法和质量控制的角度出发,比对研究了测定水中汞的原子荧光法和冷原子吸收法,并提出了质量控制指标。研究结果表明:(1)两种方法具有可比性;(2)质量控制指标与样品浓度之间没有明显相关性;(3)对于标准样品,两种方法的室内相对标准偏差(RSD)、室间相对标准偏差(RSD′)和相对误差(RE)结论一致,即RSD≤5%,RSD′≤10.0%,RE≤±15.0%;(4)两种方法的标准样品和实际样品的加标回收率基本一致,为85%～115%,原子荧光法的空白加标回收率略低于冷原子吸收法。

It studied the monitoring method and quality control technology of mercury in water determined by atomic fluorescence spectrometry and cold atomic absorption spectrometry,and the quality control index was proposed.The study indicated：（1）The two methods were of comparability;（2）there was no significant correlation between quality control index and the concentration of samples;（3）for standard samples,both method had the same conclusions： RSD≤5%,RSD＇ ≤10.0%,RE≤±15.0%;（4）the recoveries of standard and actual samples ranged between 85% and 115%,but the recovery of blank samples with atomic fluorescence spectrometry was slightly lower than that of cold atomic absorption spectrometry.