What are the similarities and differences between cold atomic absorption spectrometry and cold atomic fluorescence spectrometry in determining mercury in water samples in principle and instrument?

It's the same in principle. Atomic absorption method measures the absorption energy during energy transition, and atomic fluorescence method measures the fluorescence value when it returns to the ground state. They only measured two stages of the body's response.

When mercury is determined by cold atomic absorption spectrometry, an additional device, hydride generator, should be added to the atomic absorption spectrophotometer. Compared with atomic fluorescence measurement, hydride generator has great stability and precision. )

Direct injection of mercury by cold atomic fluorescence spectrometry does not require other auxiliary equipment, which is not much simpler than the previous method.

Atomic fluorescence is the intellectual property of China and the best in China. Now domestic manufacturers have it.

Beijing North Corelli, Beijing Yoshida, Guang Hai, etc.