双波长薄层扫描法测定刺山柑不同部位盐酸水苏碱的含量

采用双波长薄层扫描法测定刺山柑不同部位盐酸水苏碱的含量。展开剂:正丁醇-盐酸-乙酸乙酯(8∶3∶1);波长分别为λS=525nm,λR=700nm。结果表明,盐酸水苏碱点样量在2.03—16.24μg范围内线性关系良好,平均回收率为96.83%,RSD=2.00%。刺山柑植株中盐酸水苏碱的含量从高到低依次为:根、花蕾、果实、茎及叶。该方法简便、准确、重现性好,可用于刺山柑不同部位盐酸水苏碱含量的测定。     

薄层扫描法测定金水六君煎胶囊中盐酸麻黄碱的含量

建立了双波长薄层扫描法测定金水六君煎胶囊中盐酸麻黄碱的方法。盐酸麻黄碱在1—5μg范围内有良好的线性关系,平均回收率98.4%,RSD=2.43%。本方法简便,重现性好,可用于该制剂的质量控制。     

苦瓜果实中盐酸小檗碱的提取工艺

以新鲜苦瓜为原料,用盐酸小檗碱为对照品,正交设计优化苦瓜中盐酸小檗碱提取条件,采用超声波和水浴提取法等2种工艺提取苦瓜中盐酸小檗碱,研究单因素对盐酸小檗碱提取率的影响,确定提取盐酸小檗碱的最佳条件.水浴提取苦瓜盐酸小檗碱以A2C1B1组合为最佳提取条件,提取率为5.1642mg/g.超声波提取苦瓜盐酸小檗碱以A3B2C2组合为最佳提取条件,提取率为6.3267mg/g.实验结果表明,超声波法提取效果优于水浴提取法.     

Estimation of Metformin Drug for the Diabetes Patients by Simple,Quick and Cheap Techniques within the Formation of Colored Charge Transfer Complexes

Metformin (Met) is a drug developed for the treatment of patients with type Ⅱ diabetes. Recently, Met estimation in pharmaceutical formulations and human fluids has gained a growing interest. To extend requisite data that can be used to assessment of Met quantitatively based on charge-transfer (CT) complexation, the present study describes the synthesis and characterization of CT complexes that formed between drug Met and the organic π-acceptors picric acid (PA), chloranilic acid (CLA), chloranil (CHL), 7,7’,8,8’-tetracyanoquinodimethane (TCNQ), and dichlorodicyanobenzoquinone (DDQ). The properties of the formed CT complexes were investigated by elemental, spectral (UV-visible, IR, and Raman spectroscopies), thermal (TG) and morphological (SEM) studies. IR results indicated that the complexation of Met with either PA or CLA acceptors occurs through proton transfer interaction, whereas its complexation with CHL, TCNQ, or DDQ acceptors occurs through n→π* interaction.     

4(5)-氰基咪唑的合成与表征

以D-果糖为初始原料,经环合、氧化,再加入盐酸羟胺作为氰基化试剂一步法制得4(5)-氰基咪唑.利用1H NMR、13C NMR等手段对各步所得产物的结构进行了表征,结果表明产物为4(5)-氰基咪唑.以D-果糖计,3步反应的总收率为33.5％.     

荷移分光光度法测定盐酸精氨酸注射液的含量

盐酸精氨酸与四氯苯醌在硼砂溶液中 ,5 0℃下反应 1 2 0 min可获得 1∶ 1稳定的电荷转移络合物 ,其λmax=35 0 nm,表观摩尔吸光系数 ε=2 .2 6× 1 0 4L·mol-1 · cm-1 ,线性范围为 0— 1 0 μg/m L。测定了盐酸精氨酸注射液的含量 ,结果与文献方法一致 ,回收率在 1 0 0 .0 %— 1 0 0 .3%之间 ,相对标准偏差小于 0 .70 %。     

盐酸二甲双胍在玻碳电极上的伏安行为及测定

对盐酸二甲双胍在玻碳电极上的伏安行为进行了研究,发现在0.3 mol/L NaOH底液中,盐酸二甲双胍于-0.37 V产生良好的还原峰,其浓度在1.0×10-9～1.0×10-6 mol/L范围内与峰电流有良好的线性关系,该方法具有很强的抗干扰能力。实验测定了盐酸二甲双胍片剂中的盐酸二甲双胍含量。测得糖尿病人尿液中盐酸二甲双胍含量为7.73×10-4 mol/L,测得RSD为3.6%,回收率93.0％～105.0%。     

二阶导数光谱测定呋麻滴鼻液中盐酸麻黄碱的含量

本文采用二阶导数光谱法，测定呋麻滴鼻液中盐酸麻黄碱的含量，排除了呋喃西林的干扰，方法简单，快速，准确。平均回收率为９９．５％（ｎ＝８），ＳＤ＝０．７３，ＣＶ＝０．７３％。\     

荷移分光光度法分析两种降糖药物

用分光光度法研究了盐酸二甲双胍和瑞格列奈作为电子给予体分别与电子接受体四氯苯醌的荷移反应.确定反应及测定的条件:在硼砂与氢氧化钠缓冲溶液中,二甲双胍、瑞格列奈分别与四氯苯醌混匀于25℃水浴中恒温15 min,可形成1:1的有色稳定荷移络合物,在可见光区的最大吸收波长分别为λ二甲双胍=695 nm,λ瑞格列奈=718 nm,表观摩尔吸光率分别为ε二甲双胍=4.11×104L·mol-1·cm-1,ε瑞格列奈=3.08×104L·mol-1·cm-1,二甲双胍在1.0×10-3mol·L-1以内遵从比耳定律,而瑞格列奈在2.0×10-4mol·L-1以内遵从比耳定律.应用此法测定市售的药物制剂的测得含量与药典方法所测得结果一致(经t检验证实).二甲双胍和瑞格列奈的平均回收率分别为98.6%和102.8%,二甲双胍和瑞格列奈测定结果的相对标准偏差均小于3.5%.     

Phytochemical analysis and antidiabetic efficacy of Morus rubra

Morus rubra (red mulberry) is a folk medicine used in management of diabetes. The aim of this article to investigate the antidiabetic activity of hydro alcoholic leaf extracts of Morus rubra in the sprague dawley male rats (SD) model. Authentication of plant material, total Phenolic contents, total flavonoid contents, HPLC analysis, in-vitro antioxidant activity, acute toxicity, in-vivo oral glucose tolerance test, in-vivo STZ induced antidiabetic activity along with biochemical parameters (triglycerides, low-density lipoprotein, high-density lipoprotein, total cholesterol, serum glutamate phosphotransferase, serum glutamate oxaloacetic acid transferase, urea and creatinine). The total phenolic contents 60.32 ​± ​0.80 ​mg/g GAE (gallic acid equivalent) were found higher in ethanolic extract. The total flavonoids 16 ​± ​0.42 ​mg/g QE (quercetin equivalent) were found in petroleum ether extract. M. rubra leaf extracts were tested by HPLC for qualitative and quantitative analysis. 100 ​mg of the dried powder of Morus leaves was dissolve in methanol: water (80:20, v/v) for analysis. Chromatograms of HPLC show the presence of chlorogenic acid 0.55 mg/gm, quercetin 1.90 ​mg/g, isoquercetin 0.68 mg/gm and rutin 0.10 mg/gm. IC₅₀ (Inhibitory concentration) value has been found higher in chloroform extract (92.89 ​μg/ml). Metformin drug is used for positive control, which causes 14.6% improvement in glucose tolerance while M. rubra has been found 11.4. % at the dose of 300 ​mg/kg body wt in normal rats. In STZ treated diabetic rats, it reduces 13.0% blood glucose level while metformin reduces 21.9% up to dosing level of 300 ​mg/kg body wt. It produces reduction in biochemical parameters like, total cholesterol (TC), triglycerides (TG), SGPT, LDL, urea, creatinine and SGOT while HDL has been increased. Results show the hydro-alcoholic leaves extract of Morus rubra exhibited antidiabetic, antioxidant and hypolipidemic properties. This suggests that M. rubra has great potential to develop novel antidiabetic drug to manage this disastrous disease.