Optimization and Validation of a Method for Heavy Metals Quantification in Soil Samples by Inductively Coupled Plasma Sector Field Mass Spectrometry (ICP-SFMS)
نویسندگان
چکیده
In this work, a method for quantification of heavy metals Inductively Coupled Plasma Sector Field Mass Spectrometry (ICP-SFMS) in soil samples of El Bierzo district (Spain) has been optimized and validated. Optimization was carried out for elements: Cr, Mn, Co, Ni, Cu, Zn, Se, As, Cd, Hg, Pb and U. Validation of the method was performed with Certified and Standard Reference Materials (CRMs and SRMs); SRM2709, CRM020-051 and CRM050-051. Results obtained under optimized conditions can be summarized as follows: a) the Limits of Detection (LODs) were in the order of sub fg·g for Cr, Mn, Cu, Co, As, Cd, Hg, Pb and U, and few fg·g for Ni, Zn and Se; b) precision measurement, in terms of relative standard deviation (RSD), was being below 5%; c) the average recovery of CRM was between 81.3% and 98%. In conclusion, the method offers several advantages: fast, good accuracy, very low values of Limits of Quantification (LOQs) and high sensitivity on measurement of heavy metal.
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