Determination of copper,zinc and cadmium content in soil by AAS
This paper studied the determination of copper,zinc and cadmium in soil,and optimized the instrument measurement conditions,microwave digestion reagent,etc.The concentration of copper is linear from 0.05 to 0.4μg·mL-1,linear correlation coefficient r=0.99930;zinc concentration is from 0.02 to 0.8μg·mL-1,linear correlation coefficient r=0.99940;cadmium concentration is linear from 0.2 to 2.4μg·L-1,linear correlation r=0.99840.The recovery rate of the spike is between 95.3%and 104.6%,and the relative standard deviation of the method(n=6)is between 0.87%and 5.91%.Through the detection of copper,zinc and cadmium content in 8 soil samples of a farmland,a good method is established.The experimental results show that the method has high accuracy and good precision,which provides a certain reference for the regulatory authorities.
万方数据
维普
