Hi Fikret. A good option could be the use of microwave assisted digestion to mineralize your sample prior to the analysis by the atomic technique. I have attached you a paper where authors describe a procedure. Samples are human tissue and blood, but I think that the procedure could be also implemented in food samples. Afterwards, for the hydride generation you´ll need the typical reagents: HCl and NaBH4. For the atomic side, the Hg emission lamp and I strongly recommend you the use of the Deuterium background correction (as described in the paper). Good luck with your method!

Thanks for your help.

I remember doing this analytical technique some years ago using sodium borohydride solution to initiate the reaction. The sample must be in solution ie. dogested without elevated temperature - possibly just room temperature since mercury is volatile. As normal insert operational standards, replicates and international standards for accuracy and reproducibility. Check out the concentration of sodium borohydride - possibly 5 - 10%. I hope this helps.

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FDA has a procedure. See the Elemental Analytical Manual (EAM).

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