The main difference between so-called cold mercury and hot mercury is whether the atomizer needs to be heated. Heating is hot mercury, not heating is cold mercury. Because mercury can atomize without heating, the terms cold mercury and hot mercury are used. The essence is almost the same. Generally speaking, the detection limit of cold mercury is relatively low, while the stability of hot mercury is better. This depends on personal habits and actual needs. In fact, the biggest problem with using atomic fluorescence method to measure mercury is not the problem of using cold mercury or hot mercury, but the problem of mercury's memory effect. Because the adsorption and volatility of mercury make the memory effect large, this is the reason for using atomic fluorescence method to measure mercury. The biggest problem with mercury. For now, the most effective way to effectively reduce the memory effect is to shorten the pipeline path, just like Jin Suokun's patented technology, which highly integrates lengthy pipelines, effectively reducing the memory effect and improving technical indicators.