紫外分光光度法测定达美康片的含量

本文采用紫外分光光度法直接测定达美康片剂的含量。实验结果表明：本法简便、准确、重现性好。线性范围５．０１８２５．０９μ４ｇ／ｍｌ，γ＝０．９９９９，平均回收率９９．８１％（ｎ＝５），ＲＳＤ＝１．９０％     

中药复方“鼻敏康”定性鉴别与总黄酮提取优化

目的 :对复方"鼻敏康"进行定性鉴别,研究其有效成分黄酮的最佳提取工艺条件。方法 :采用薄层色谱法对处方中黄芪、白术、白芷、五味子进行定性鉴别,利用单因素考察了最佳提取工艺条件,用紫外分光光度法对浸膏总黄酮含量进行测定。结果 :薄层色谱得出该复方鼻敏康中含有黄芪、白术等药材;本方的最佳提取工艺为:70%乙醇提取,提取时间为1.5 h,最佳提取液固比为12:1,最佳提取次数为2次。结论 :薄层色谱实验结果为紫外测黄酮含量提供依据。采用紫外分光光度法测总黄酮含量精密度高,重复性和回收率效果较好,可以确定乙醇提取黄酮的最佳提取工艺。     

一种制备黄芩素的新方法

目的：建立制备黄芩素的新方法,并用紫外分光光度法对产品进行含量测定．方法：建立了水提法制备黄芩苷,酶解法制备黄芩素的新方法,并考察了温度、pH值、酶活单位和时间对结果的影响,优化了工艺条件．检测波长为244nm,甲醇溶解黄芩素,利用紫外分光光度法测定其含量．结果：制得黄芩素产率达到84．2％,纯度达到93．2％,黄芩素甲醇溶液在1～24mg/L之间与吸光度线性关系良好,回归方程为A=0．0032C（mg／L）＋0．0045,相关系数R^2=0．985．结论：所确定黄芩素的制备方法以及其分光光度检测法操作简便、准确,无污染,适用于黄芩素的制备及其定量测定．     

A preliminary study of beta-cyclodextrin/metoprolol tartrate inclusion complex for potential enantiomeric separation

The inclusion complex formation between Metoprolol tartarata (MeT) and β-cyclodextrin (β-CD) has been investigated using hyperchromic shift at λ_max 274.4 nm of MeT. Different parameters such as stirring time, solvent composition (aqueous and aqueous/methanol solutions with methanol content up to 50%), pH values 4.0 and 8.0 were established for optimal inclusion complex formation and confirmed two stoichiometric compositions 1:1 and 1:2. Preliminary data on usage of MeT/β-CD complex in reversed-phase HPLC indicate the potential application of this complex as a kind of pre-column derivatization for enantiomeric separation of β₁-blockers.     

石斛中石斛多糖的提取工艺研究

目的研究石斛中石斛多糖的提取工艺。方法采用正交试验法进行优选，紫外分光光度法测定多糖含量。结果粉碎度、提取次数和加水量因素对石斛中石斛多糖的提取有显著性影响。结论石斛中石斛多糖的最佳提取工艺为将药材粉碎至粗粉，加水20倍量，提取4次，每次8h。     

Emetic effects of morphine and piritramide

Background. Successful management of postoperative pain requiresthat adequate analgesia is achieved without excessive adverseeffects. Opioid-induced nausea and vomiting is known to impairpatients’ satisfaction, but there are no studies providingsufficient power to test the hypothesis that the incidence ofopioid-induced nausea and vomiting differs between µ-opioidreceptor agonists. Thus, we tested the hypothesis that the incidenceof vomiting and nausea differs between morphine and piritramide. Methods. In a prospective, randomized, double-blind fashion,we administered either morphine (n=250) or piritramide (n=250)by patient-controlled analgesia (PCA) for postoperative painrelief. We used a bolus dose of 1.5 mg with a lockout time of10 min. Incidence and intensity (numerical rating scale) ofpostoperative nausea, vomiting, pain, patient satisfaction (score0–10), side-effects (score 0–3) and drug consumptionwere measured. Results. Mean drug consumption did not differ between the piritramideand morphine groups (30.8 (SD 22.4) mg day^–1 vs 28.4 (21.8)mg day^–1) during the first postoperative day and therewere no significant differences in the overall incidence ofnausea (30% vs 27%) and vomiting (19% vs 15%). Intensity ofnausea correlated inversely (P=0.01) with morphine consumptionbut not with piritramide consumption. Pain scores both at rest(2.2 (1.9) vs 2.6 (2)) and during movement (4.4 (2.2) vs 4.9(2.3)) were slightly but significantly less with morphine. Conclusions. Opioid-induced emesis was observed in about one-thirdof the patients using morphine and piritramide for PCA and theincidence of vomiting was one-half of that. Potential differencesin the incidence of vomiting during PCA therapy between theseµ-opioid receptor agonists can be excluded. Br J Anaesth 2003; 91: 218–23     

注射用加替沙星与利巴韦林注射液配伍稳定性考察

目的 :考察注射用加替沙星与利巴韦林注射液配伍稳定性。方法 :在25℃条件下 ,观察配伍液在8h内的外观、pH值变化 ,并用紫外分光光度法分析其含量变化。结果 :两药在0 9 %氯化钠注射液、5 %葡萄糖注射液中配伍8h内以上各项均无显著性变化。结论 :注射用加替沙星与利巴韦林注射液以0 9 %氯化钠或5 %葡萄糖作溶媒在室温下8h内可配伍使用。     

吲达帕胺胶囊的研制与质量控制

目的 :研究吲达帕胺胶囊的制备及其质量控制方法。方法 :含量测定采用紫外分光光度法 ;有关物质检查采用高效液相色谱法。结果 :吲达帕胺在3 7～11 1μg/ml浓度范围内线性关系良好 ,r=0 9997,回收率为99 50% ,精密度为0 43% ;有关物质检查精密度为0 1%。考察3批样品 ,相对百分含量分别为99 07%、99 34%、99 58 % ;每批样品随机取10粒 ,所测得的含量均匀度A +1 80S值均小于15;有关物质均小于1 %。结论 :以本方法制备的吲达帕胺胶囊 ,主药和辅料混合均匀 ,含量及有关物质符合相关规定 ,质控方法可靠。     

氟康唑粘附凝胶的研制

目的 :开发氟康唑粘附凝胶。方法 :以氟康唑为主药 ,卡波姆、甘油及其它溶剂为辅料 ,制备氟康唑粘附凝胶 ,并进行药剂学、质量标准方法学研究。结果与结论 :本方法制备工艺简单 ,性质稳定 ,所得氟康唑粘附凝胶有望成为理想的外用抗真菌制剂     

加碱提取何首乌中大黄素工艺的探讨

目的:筛选提取何首乌中大黄素的最佳工艺条件。方法:根据何首乌中大黄素的理化性质,考察乙醇溶剂量、提取时间、加入碱量3个因素,进行正交优化试验。结果:用7倍量80%乙醇和占溶液体积12.5%的0.5%氢氧化钠溶液回流提取0.5小时的提取方法可以获得较高的大黄素提取率。结论:提取时间、加入碱量对何首乌中大黄素的提取效率有较大影响。