Study of determination method for heavy metals and harmful elements residues in four traditional Chinese medicine injections / 中国中药杂志

Methods for determination of heavy metals and harmful residues in traditional Chinese medicine injection were established. Graphite furnace atomic absorption spectrometry was used for determination of lead, cadmium and copper, atomic fluorescence spectrometry for arsenic and mercury. The preprocessing method was optimized. The average recoveries of 5 elements were between 91% and 112% while the precisions were less than 2%. The determination limit of lead, cadmium, copper, arsenic and mercury were 0.28, 0.014, 0.49, 0.19, 0.061 microg x L(-1), respectively. The proposed method was simple, sensitive, accurate and reliable, and could be used widely.

Study on the detecting methods of the imported materia medica--olibanum / 中国中药杂志

<p><b>OBJECTIVE</b>To analyse the chemical components of the essential oil of Gum olibanum somalilnds and Gum olibanum Ethiopia, and to set up determination methods of their main components.</p><p><b>METHOD</b>Two kinds of essential oil are identified by GC-MS, and assayed by Gas chromatography, using SE-54 as the packing material (column 2.1 m x 3.2 mm), with column temperature starting from 80 degrees C, holding for 1 min, and then rising at the rate of 15 degrees C per minute to 170 degrees C.</p><p><b>RESULT</b>40 kinds of chemical compounds in the essential oil of Gum olibanum somalilnds and 22 kinds of those of Gum olibanum Ethiopia were identified by GC-MS, the main component in the essential oil of Gum olibanum somalilnds being alpha-pinene, and the main one of Gum olibanum Ethiopia being Octyl acetate 17 batches of samples were determined with the linear range of alpha-pinene being 0-10.80 micrograms, the correlation coefficient being 0.9995, the recovery being 98.16%, RSD being 1.83%; the linear range of Octyl acetate being 0-10.32 micrograms, the correlation coefficient being 0.9996, the recovery being 99.56%, and RSD being 1.36%.</p><p><b>CONCLUSION</b>This study can be used for the setting up of the specification of Olibanum.</p>