Advantages and Disadvantages of GFAAS:

The most important advantages of this flameless vaporisation method are:

• It eliminates the possibility of the interaction of the sample along with various components of the flame, thus eliminating anomalous results.
• The longer residence time for the analyte within the path of incident radiation leads to a greater sensitivity.
• As a higher proportion of the analyte sample is converted within vapours, the sensitivity is further enhanced.
• It gives an ability to deal along with very small sample sizes. This becomes quite important in the context of clinical samples.

Thus, it has the following disadvantages too.

• Effects of the background absorption are more serious.
• Analyte might be lost during ashing especially for the volatile compounds.
• The sample might not be fully atomised and it might produce 'memory effect' within the furnace.
• Precision is poorer than within flame AAS. However, furnace auto samplers have enhanced the precision of furnace AAS.
• Problems because of interferences and high background might become serious.