Application of UV similarity in quality control of Chinese medical injection / 中国中药杂志

<p><b>OBJECTIVE</b>To propose an algorithm of the similarity between UV-spectra for controlling the quality of Chinese medical injection.</p><p><b>METHOD</b>The similarity is calculated base on the data of two UV-spectrum curves, thus the sample quality is evaluated according to the average value of the similarity of the UV-spectra between sample with each of standard samples; the proposed algorithm of the similarity is compared with cosine of vectorial angle and relative coefficient; the proposed method for quality evaluation of traditional Chinese injection is discussed with the method according to the chromatographic fingerprint similarity.</p><p><b>RESULT</b>The calculated similarity with the proposed method can be sensitive to show the difference between UV-spectra. This proposed method for quality evaluation was applied for assessing quality of 14 batches of Xiangdan injection and the results well coincident with sample quality.</p><p><b>CONCLUSION</b>The proposed method can be used to evaluate the quality of the Chinese medical injection according to the similarity of two UV-spectrum curves.</p>

Correlation studies of contents of copper and organic components in Astragalus roots / 中国中药杂志

<p><b>OBJECTIVE</b>To study the relationship between copper and organic components, total flavonoids of Astragalus (TFA), total saponins of Astragalus (TSA) and total polysaccharide of Astragalus (TPA).</p><p><b>METHOD</b>TFA, TSA and TPA were extracted from Astragalus roots using different organic solvents, and determined by colorimetry. The concentration of copper in extracts was determined by graphite furnace atomic absorption spectrometry (GFAAS).</p><p><b>RESULT</b>Copper was found in TFA, TPA and TSA, and its concentration in TFA and TPA was higher; the content of copper was correlated significantly to that of TFA and TPA (r1(2) = 0.754 8, F1 = 57.202, P < 0.01 and r2(2) = 0.499, F2 = 21.906, P < 0.01), while not to that of TSA ( r3(2) = 0.0026, F3 = 0.041, P > 0.1).</p><p><b>CONCLUSION</b>Correlation analysis could reveal the relationship of copper with organic components in Astragalus roots; contents and structure characteristics of organic components might be important factors influencing the distribution of copper in Astragalus roots.</p>