Question

Why is an electrothermal atomizer more sensitive than a flame atomizer?

Short answer

Sample efficiency is low in flame atomizers but high in electrothermal atomizers, which are more sensitive.

Step-by-step solution

Step1. Given information

an electrothermal atomizer has a higher sensitivity than a flame atomizer.

Step2.Low efficiency of the flame atomizer

In the case of a flame atomizer, the sample solution for atomization is first nebulized using an oxidant gas flow, then combined with gaseous fuel and atomized in a flame. A considerable portion of the sample is wasted here, running down the drain and resulting in low sample efficiency.

Step3. Sensitivity of electrothermal atomizer 

In the case of an electrothermal atomizer, sample evaporation occurs first, followed by burning to allow atomization to occur. In this situation, only a few microliters of sample are utilized, and the sample's efficiency is high. The time spent by the atoms in the optical path is increased by one second.

Step 4. Conclusion

From the above comparison, it can be said that an electrothermal atomizer is more sensitive than a flame atomizer.