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1996 Vol. 14, No. 5

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The legislation and legal procedures of Rx to OTC switche
Wei Shuiyi, Zhang Yinzhen
1996, (5): 259-262,277.
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The paper briefly reviews the statutory definition of prescription drug (Rx) and non-prescription drug (OTC),the statute and regulations of Rx&OTC classification system,and the criteria employed in determining whether a drug is marketed by prescription or OTC in the other countries.We then outline the legal procedures of Rx to OTC switches in the United States.
1996, (5): 263-266.
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1996, (5): 266-269.
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1996, (5): 269-271.
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1996, (5): 271-272.
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The observation of the bacteriostasis on azone
Hao Yong, Liu Tiquan, Liu Zhiliang, Cong Yuezhu
1996, (5): 273-274.
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Azone is a high percutaneous penetration enhancer.It can promote most drugs percutaneous absorption.Our study shows that the 20μg/ml concertration of Azone can produce obviously bacteriostasis for the gram-positive bacterium and the spore.
1996, (5): 274-275.
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1996, (5): 275-276.
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1996, (5): 276-277.
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1996, (5): 278-279.
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The preparation of compound metronidazole gel
Wang Zengfu, Zhu Quangang, Wang Wengji, Hu Jinhong, Liu Lili, Zhu Zhenyu
1996, (5): 279-282.
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The gel of compound metronidazole is at ransparent hydrophilic gel of carbomer 940,which consist of metronidazole and dexamethasone sodium phosphate.It is used topically to treat aphthous ulcer and peridental inflammation.We reported the preformulation,method of preparation,quantitative determination and the standard for quality of the gel in this paper.The metronidazole and dexamethasone sodium phosphate in the gel were analysed by the computer-aided convolution cure method without prior separation.These methods are simple and rapid.
Preparation and quality control of film of ofloxacin compound
Wang Zhen, Zhu Xingnian, Yu Ji, Jiang Xinan, Wang Ping
1996, (5): 282-285.
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Smear method was used to prepare film of ofloxacin compound with PVA0486-CMCNa(2:1) as the material of drug film,PVA0486 as the coating material.UV-spectropho-tometory was used to determine the content of metronidazole.The average recovery was 97.47%,RSD=1.61%
1996, (5): 285-286.
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1996, (5): 286-288.
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1996, (5): 288-290.
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1996, (5): 290-291.
Abstract(2304) PDF (2343KB)(2186)
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First order derivative UV spectrophotometry of ephedrine hydrochloride nasal drops
Wu Jingping
1996, (5): 292-294.
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The first order derivative UV spectrophotometry was for determination of ephedrine hydrochloride in its nasal drops to eliminate interference of ethyl p-hydroxyhenzoate.A good linearity has shown in the concentration of 5~25μg/ml,r=0.9999(n=5).The average recovery was 99.83% and cv was 0.49%.The method is simple,rapid and accurate.
Determination of puerarin in Gegen qinlian pian by RP-HPLC
Tan Shengjian, Qiu Xia, Li Guanghui, Zhao Bingcheng, Liang Yuqing
1996, (5): 295-297.
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A quantitative method was developed for the determination of puerarin in Gegen Qing lian Pian by reversed phase HPLC.Chromatographic conditions included column ODS-C(10),column temperature,35℃;detector UV,250nm;mobile phase,methanol-water(23:77),flow rate 1 ml/min;injecting volume,10μl;external standad.the number of theoretical plates calculated by puerarin peak was no less than 2000.The standard curve was linear in the concentration range of 5μg/ml-80μg/ml,and correlation coefficient was 0.9999.The average rccovery and the relative standsrd deviation were 97.6% and 1.8%,respectively.
Guantitative analysis of salidvn tablets by capillary gas chromatography
Yang Xiaojun, Jin Baogeng, Yang Song, Bi Shenlin, Wu Guilan, Li Xiaodan
1996, (5): 297-299.
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Salidvn tablets have been separated and determinaed by capillary Gas chromatography.Salidvn was separated on a SE-54 column(0.25 mmid×25m),using hydrogen flame ionzgation detector(FID).There was a good linearity ranging from 0.3 to 1.3mg of salidvn (caffeine:r=0.9994, Y=1.5584χ-0.0257;aminopyrine: r=0.9992, Y=1.1653χ-0.0893;Phenobarbital: r=0.9998, Y=2.535χ-0·1754;Phenacetin: r=0.9995, Y=2.9554χ-0.1281).The average recovery rate were 100.2%,99.8%,100.5%, 98.4% respectively.
RP-HPLC method for the determination of puerarin in isoflowonesd from Radix puerariae and its preparations
Guo Jianping, Shun Qirong, Zhou Quan
1996, (5): 300-301,299.
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A RP-HPLC method for the determination of Puerarin in isoflowonesd from Radix Puerariae and its preparations and a C 18 column and a mobile phase of methanol-water (25:75) were employed.Puerarin was determined at 250nm.The recovery rate of the Puerarin was 100.9%.The rigression equation was X=466.83+8501.25C(r=0.9991),The method is simple,sensitive and accurate.
1996, (5): 302-304.
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1996, (5): 304-307.
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1996, (5): 307-307.
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1996, (5): 308-310.
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1996, (5): 310-313.
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1996, (5): 313-314.
Abstract(1973) PDF (585KB)(386)
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1996, (5): 314-317.
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1996, (5): 317-319.
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1996, (5): 319-320.
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