Determination of Cadmium in Rice by Microwave Digestion Atomic Absorption Spectrophotometry
In this paper,a method for the determination of Cd content in rice by microwave digestion-atomic absorption spectrophotometry was established.The aqua regia was used as the digestion solution to treat it in a microwave digestion instrument,and the content of Cd in the sample was detected by atomic absorption spectrophotometer at the wavelength of 228.80 nm.The results showed that the concentration of Cd showed a good linear relationship in the range of 0 mg·L-1 to 0.5 mg·L-1,the correlation coefficient was 0.999 6,the detection limit was 0.006 0 mg·L-1,the relative standard deviation was 1.42%(n=6),and the recovery rate was 97.36%to 102.15%.The method is simple,rapid and accurate,and is suitable for the determination of Cd content in rice.
NETL
NSTL
万方数据
