Study on water-soluble iron, heavy metals and harmful elements of Magnetitum / 中国中药杂志

<p><b>OBJECTIVE</b>To measure the contents of the water-soluble iron, five heavy metals and harmful elements in Magnetiturn and provide a basis for the quality control and safety evaluation of Magnetitum.</p><p><b>METHOD</b>Iron (Fe), lead (Pb), cadmium (Cd) and copper (Cu) were determined by atomic absorption spectrometry (AAS); arsenic (As) and mercury (Hg) were determined by atomic fluorescence spectrometry (AFS).</p><p><b>RESULT</b>The mean content of element iron is 764.30 mg x kg(-1). The contents of five water-soluble heavy metals and harmful elements in Magnetitum were within the safety range. The recovery of the standard addition was in the range of 93.7% - 110.6%, and the RSD was less than 5.0%.</p><p><b>CONCLUSION</b>Analyzing the water-soluble iron, heavy metals and harmful elements in Magnetitum is effective to the quality control and the safety evaluation of magnetitum.</p>

Location and relative quantity of flavonoids in the leaf of Apocynum venetum / 药学学报

In this study, laser scanning confocal microscopy (LSCM) was used to determine the location and relative quantity of flavonoids in the leaves of Apocynum venetum L. from the top, middle and basal parts of the branch. The leaves of the plants of one, two and three years old, separately, were collected in July. ANOVA and LSD test were employed in the statistical analysis. The results indicated that flavonoids located mainly in xylem conduit of vein, collenchyma, epidermic cells and cuticle. The data of flavonoids contents under statistical analysis showed that difference existed in the leaves of different parts and different ages. This study provided the reliable scientific material about the analysis of the ecological and the exploitation of the leaves of Apocynum venetom L.