Analyses on the trace elements of soils in geo-authentic and non-authentic production areas of Flos lonicearae / 中国中药杂志

<p><b>OBJECTIVE</b>To analyse the trace elements presented in the same germplasm of Flos Lonicerae with the soil in different producing areas of crude drugs and to investigate, the relationship between the trace elements and the characteristics of the geo-authentic Flos Lonicerae in the soil and crude drugs.</p><p><b>METHOD</b>The analyses on the trace elements of soil and crude drugs were made by ICP-AES.</p><p><b>RESULT</b>The contents of Sr, K, Na, Mg and Ca were higher in the geo-authentic areas, and the contents of Ca, Sr and Fe were higher, but the Cr and Pb were lower in the geo-authentic Flos Lonicerae. The geo-authentic crude drugs had a strong tendency to accumulate P and Cu.</p><p><b>CONCLUSION</b>There are no direct relationship between the concentrations of trace elements in Flos Lonicerae and those in their corresponding soil. There are good relationship between the absorption and accumulation of Ca and Cr, Co, Na and Fe; Zn and Co, Cr, Mn; Na and Co; Mg and Mn.</p>

Determination of quercetin in the Herba Euphorbiae Humifusae / 中国中药杂志

<p><b>OBJECTIVE</b>To develop an HPLC method for determining quercetin in Herba Euphorbiae Humifusae.</p><p><b>METHOD</b>ODS column was used with acetonitrile: 0.4% phosphoric acid (40:60) as mobile phase. The detection wavelength was at 370 nm and the flow rate was 1.0 mL.min-1.</p><p><b>RESULT</b>The linearity was obtained over the range of 0.0364-0.1274 microgram (r = 0.9999). The average recovery was 100.71% with relative standard deviation of 2.45%.</p><p><b>CONCLUSION</b>This method can be used for quality control of Herba Euphorbiae Humifusae. It is simple, rapid and reliable.</p>