Why does fluorescence measurement of mercury require pre-processing?

Why does fluorescence measurement of mercury require pre-processing?

It is not easy to measure mercury using atomic fluorescence method. Generally speaking, it is divided into two types: cold mercury and hot mercury, and the difference between the two It lies in the temperature of atomization. When heated during atomization, it becomes hot mercury, and vice versa, it becomes cold mercury. Generally speaking, hot mercury is more stable, while cold mercury has a lower detection limit. This depends on actual needs. Also, I think the biggest problem with using atomic fluorescence method to measure mercury is that mercury has a large memory effect. Because mercury has great adsorption and volatility, the memory effect has always been a problem in measuring mercury using atomic fluorescence method. Now, the way to effectively reduce the memory effect is to shorten the pipeline path as much as possible, just like Jin Suokun's patented technology, which highly integrates lengthy pipelines, effectively reducing the memory effect and improving technical indicators. There is also the need to keep the pipelines clean, be careful in pre-processing, and operate in a standardized manner, etc.