[Determination of microelements in C. tangutica (Maxim.) korsh flower by FAAS].

The powder was digested with HNO3-HClO4 mixed acid (4 : 1) before determination. The eleven microelements in C. tangutica (Maxim.) korsh flower were determined by FAAS, and the determination medium was 4% nitric acid. The work conditions, accuracy and precision of the method were studied. The experimental results show that the interaction of the elements were small under the conditions of determination, and no significant effect on the result. The linear correlations of standard curves are good (r = 0.9871-1.000 0). The recovery (n = 7) is 98.3%-105.1%, and the RSD (n = 7) is 0. 23%-1.07%. It can be used to determine the trace elements simultaneously in C. tangutica (Maxim.) korsh flower. The method has good precision and accuracy, so it is able to meet the requirements for analysis. The contents of Ca, Mg, K, Cu, Fe, Zn, Mn, Na and Co were 206.30, 284.50, 3415.20, 0.116 6, 62.171, 3.275, 67.826 5, 28.00, 0.133 3 mg (100 g)(-1)', respectively, while Cd and Ni were not found in the samples. The results provided theoretical basis for the effect of C. tangutica (Maxim.) korsh herbal medicine.

[Determination of microelements in different parts of Limonium bicolor by FAAS].

Eight microelements in the flower, stem, leaf and root of limonium bicolor were determined by FAAS. Different parts of the powder were digested with HNO3-HClO4 mixed acid (4+1) before the determination. Work conditions, accuracy and precision of the method were studied. The experimental results show that the recovery (n = 7) is 99.3%-105.3%, while RSD (n = 7) is 0.34%-1.04%. The content of each microelement in the different parts of limonium bicolor is not the same. For the flower: Na>K>Mg>Ca>Fe>Zn>Co>Cu, stem: K>Mg>Ca>Na>Fe>Zn>Cu>Co, leaf: K>Mg>Ca>Na>Fe>Zn>Co>Cu, and root: K>Mg>Na>Fe>Ca>Zn>Cu>Co, but the contents of K, Mg, Cu, Na and Fe in all different parts of limonium bicolor are relatively high. The method has good precision and accuracy so that it is able to meet the requirements for analysis.