Sampling Techniques for Atomic Absorption Spectrometry
Sampling Techniques for Atomic Absorption Spectrometry Home > Analytical Chemistry > Analytical Chemistry - Atomic Absorption > Atomic Absorption Spectrometry (AAS) > Sampling Techniques for Atomic Absorption Spectrometry Sampling Techniques for Atomic Absorption Spectrometry Two systems are commonly used to produce atoms from the sample in atomic absorption spectrometry : Aspiration & electrothermal atomization (graphite furnace). Aspiration involves sucking a solution of the sample into a flame. Figure I.1 shows a typical burner and spray chamber. Ethylene/air or ethylene /dinitrogen oxide are used. A flexible capillary tube connects the solution to the nebulizer. At the tip of the capillary, the solution is “nebulized” that means is broken into small drops. The larger drops fall out and drain off while smaller ones vaporize in the flame. Only 1% of the sample is nebulized...