Abstract:

To investigate the contents of 8 metal elements (Al,As,Cd,Cu,Mn,Ni,Zn,Pb) in Lonicerae Japonicae Flos from three main habitats Shandong, Henan and Hebei, microwave digestion was used for treatment of the flower samples, and the contents of 8 elements were determined by ICP-OES. The method showed a good linear relationship (R between 0.999 96~1.000 0), and the average recovery rate between 95.30%~101.2%, and the relative standard deviation less than 3% (n=8), in line with the requirements of the element analysis. Each content of 8 elements (Al、As、Cd、Cu、Mn、Ni、Pb and Zn) in 26 samples of Lonicerae Japonicae Flos was measured,and they were in the ranges of 10.30~49.68,0.050 0~0.333 3, 0.066 7~0.333 3, 0.300 0~7.317, 4.983~26.87, 5.767~12.55, 0.100 0~1.500 and 3.550~16.90 mg/kg respectively. The results showed that the metal element contents in Lonicerae Japonicae Flos were quite different, and some mental contents were too higher or even exceeded the standard values.

Key words: Lonicerae Japonicae Flos, metal element, microwave digestion, ICP-OES