I am learning about different analytical methods such as Atomic Absorption Spectrscopy and Atomic Emission Spectroscopy and I'm having a difficult time understand how to interpret the detection limits for the different methods. For example, for AES my book says "detection limits when using an ICP are significantly better than those obtained with flame emission" follow by the table below.
I understand that the detection limit shows the lowest quantity of an element that can be detected by the instrument. However, how do I choose which is the better instrument for an experiment? And why is "ICP significantly better than flame emission"? I would assume that the larger the detection limit, the better since you have a greater limit and thus a better chance of detecting the element. Is that not the correct way to think?