Dear Ajeet. Regarding your question about the using distilled water for AAS analysis. It is highly recommended to use deionized water for AAS analysis , although using blank with the same distilled water will subtract all metals exist in distilled water.

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Thanks sir

Thanks sir

Try always to use deionized water for AAS analysis.

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It depends what are you going to determine.

If low Na, K, Ca, Mg - you need something more than distilled water.

If low Cd, Pb, Hg - you can use even tap water :)

The only question is blank signal that depends on water quality.

Thanks sir

Yes Usman is right

Atomic Absorption spectroscopy is an advanced technique for metal analysis related to clourimetric analysis.

The method requires very small sample volumes and can detect very low concentrations of a metal.

The basic relations describing absorbance and transmittance have been derived for the ideal situation.

In laboratory analysis the matter becomes more complicated because of impurities in the reagents The technique employed in overcoming these variations is to use a blank into procedure and make all measurements relative to it.

In case of light transmission the total absorbance is due to the concentration of the metal in which we are interested and not other metals, which are interference.

It is therefore not advisable to use distilled water in blank to totally avoid interference. De ionized water shall not have any interference and therefore light generated by a metal in an excited state is directed in a excited state. The amount of light absorbed is proportional to the concentration of metal in the sample. This will give precise reading without interference.

Thank you sir

Dr K N Sheth Sir Absolutely right I am using deionized water

Since you are going to use AAS to measure minerals, it is important to use water free of minerals which is either deionised water or double distilled water.