Determination of lead, cadmium, cobalt, antimony and beryllium in soil by graphite furnace atomic absorption spectrometry
Zhumadian Bureau of hydrology and water resources of Henan Province, Zhumadian 463000, China
Abstract：A method for the determination of lead, cadmium, cobalt, antimony and beryllium in soil by graphite
furnace atomic absorption spectrometry was established. Under the best experimental conditions, the mixture of nitric acid,
hydrochloric acid, hydrofluoric acid and hydrogen peroxide was used for microwave digestion of soil samples, and the
mixture of ascorbic acid and magnesium nitrate was used as matrix modifier. The mass concentration of lead, cadmium,
cobalt, antimony and beryllium had a good linear relationship with absorbance in their respective range, the correlation
coefficients were all more than 0.999, and the detection limit of each element was 0.008-0.06 μg/g. The recovery of the
standard addition of the sample was 90.5%-104.0%, and the relative standard deviation of determination results was less
than 2.5%(n=6). The method has the advantages of simple pretreatment, high sensitivity, low detection limit, accurate and
reliable results, and it can be used for the determination of lead, cadmium, cobalt, antimony and beryllium in soil.
Keywords：soil; heavy metals; microwave digestion; graphite furnace atomic absorption spectrometry
焦二虎. 石墨炉原子吸收法测定土壤中铅、镉、钴、锑、铍[J]. 化学分析计量，2020，29(2)：95-97.
JIAO E H. Determination of lead，cadmium，cobalt，antimony and beryllium in soil by graphite furnace atomic absorption spectrometry[J]. Chemical analysis and meterage，2020，29(2)：95-97.