Determination of Nickel in Soil by Flame Atomic Absorption Spectrometry with Microwave Digestion

Soil samples were digested in an inclosed microwave system,then flame atomic absorption spectrometry was applied to determination of nickel in the samples.Compared with national standard method,the results tested by microwave digestion were almost consistent.But the proposed method was improved in digestion time and reagent.Under the optimum conditions,the detection limit was 0.015 4 mg/L with recoveries of 97.4%-103.0%.The relative standard deviation of determination was lower than 4.1%.