高效液相-阳离子交换色谱法测定藏药安神丸中槟榔碱的含量

目的建立高效液相-阳离子交换色谱法测定藏药安神丸中槟榔碱含量的方法。方法样品用乙醚溶液和碳酸盐缓冲液提取后,用Sepax Polysulfonix-SCX(250 mm×4.6 mm,5μm)强阳离子交换树脂色谱柱分离,以乙腈-0.2%磷酸溶液(pH 3.8,10:90,V:V)作为流动相进行洗脱,0.5 mL/min流速,用紫外检测器于215 nm波长处进行测定。结果氢溴酸槟榔碱在7.028~210.840μg/mL范围内线性关系良好(r~2=0.9998),回归方程为Y=44.5058X-56.3314,加标回收率为95.67%~97.41%,相对标准偏差为1.07%~1.80%(n=3)。结论此方法具有良好的精密度、稳定性及回收率,可用于安神丸中槟榔碱成分的测定。     

槟榔中槟榔碱的乙醇回流提取工艺研究

采用加热回流提取法从槟榔中提取槟榔碱。以槟榔碱得率为考察指标,用高效液相色谱法测定其含量,在单因素试验基础上,采用L9(34)正交试验得出槟榔中槟榔碱的最佳提取工艺：乙醇体积分数85%、料液比1:14(g/mL)、提取温度85℃、碱化pH8。此条件下槟榔碱得率为(0.251 ± 0.03)%。     

不同花期槟榔花槟榔碱的含量分析

利用热回流法提取不同花期的槟榔花中的槟榔碱,通过高效液相色谱法,以氢溴酸槟榔碱的含量为指标,测定样品中槟榔碱的含量。结果显示,初花期、盛花期和末花期的槟榔花中槟榔碱含量分别为(4.96±0.067)mg/g、(4.26±0.14)mg/g、(2.02±0.16)mg/g;结果表明,在槟榔花的不同花期,槟榔碱的含量随着槟榔花不断成熟而不断降低,为槟榔花的采收加工提供理论参考。     

响应面法优化亚临界水提取槟榔籽中槟榔碱的 工艺研究

目的利用响应面试验优化亚临界水提取槟榔籽中槟榔碱的工艺。方法在单因素实验的基础上,利用单因素试验结合Box-Benhnken实验和响应面分析法,研究提取温度、提取时间以及液料比3个因子对槟榔籽槟榔碱提取率的影响,通过回归分析模拟得到二次多项式回归方程的预测模型。结果亚临界水提取槟榔籽中槟榔碱的最佳工艺条件为提取温度144℃,提取时间43 min,液料比35:1(mL/g)。由模型预测提取率为4.23mg/g,验证实验结果为4.25 mg/g,误差仅为0.47%,与预测值较接近,表明模型具有较好预测性。且各因子对提取率的影响大小依次是提取温度提取时间液料比。结论亚临界水提取可以作为一种有效的槟榔籽中槟榔碱提取方法。     

不同花期槟榔花中槟榔碱的含量分析

利用热回流法提取不同花期的槟榔花中的槟榔碱,通过高效液相色谱法,以氢溴酸槟榔碱的含量为指标,测定样品中槟榔碱的含量。结果显示,初花期、盛花期和末花期的槟榔花中槟榔碱含量分别为4.96±0.067 mg/g,4.26±0.14 mg/g,2.02±0.16 mg/g;结果表明,在槟榔花的不同花期,槟榔碱的含量随着槟榔花不断地成熟而不断降低,为槟榔花的采收加工提供理论参考。     

PVC MATRIX MEMBRANE SENSORS FOR POTENTIOMETRIC DETERMINATION OF ARECOLINE

The construction and electrochemical response characteristics of Poly (vinyl chloride) (PVC) membrane sensors for arecoline HBr (AR) are described. The sensing membranes incorporate ion association complexes of (AR) cation and sodium tetraphenyl borate (NaTPB) (sensor 1) or phosphomolybdic acid (PMA) (sensor 2) or phosphotungstic acid (PTA) (sensor 3) as electroactive materials. The sensors display a fast, stable and near-Nernstian response over a relative wide AR concentration range (1 × 10^?2 – 4 × 10^?5 M) and (1 × 10^?2 to 5 × 10^?6 M), with cationic slopes of 52.5, 50.5 and 51.5 mV per concentration decade for sensor 1, 2, and 3, respectively over a pH range of 3.0–6.0. The sensors show good discrimination of AR from several inorganic and organic compounds. The direct determination of 1.5–2360.0 μg/ml of AR show an average recovery of 99.0, 98.5 and 99.5% and a mean relative standard deviation of 1.7, 1.6 and 1.5% at 200.0 μg/ml for sensor 1, 2 and 3 respectively. The proposed sensors have been applied for direct determination of AR in human saliva. The results obtained for determination of AR in saliva using the proposed method comparable favorably with those obtained using HPLC method.     

Alkaloids from areca (betel) nuts and their effects on human sperm motility in vitro

An improved high-performance liquid chromatography (HPLC) method was established to rapidly and simultaneously determine 3 main alkaloids (arecoline, arecaidine, and guvacine) in areca (betel) nuts (AN), and 12 AN samples from the main betel palm growing areas on the Chinese Mainland were collected and determined. Semen samples from acceptable volunteers were treated in vitro with different concentrations of the 3 alkaloids to evaluate the effects on sperm motility (SM). Highly motile spermatozoa were selected from the samples and divided into 5 equal fractions. Various concentrations of each alkaloid were added to 4 of the 5 fractions, and 1 fraction was used as a control. All fractions were incubated for 4 h. A computer-aided sperm analysis system was used to measure 5 SM parameters, motility, average path velocity, straight-line velocity, curvilinear velocity, linearity, and amplitude of lateral head displacement. The results showed that the contents of the amount of alkaloids in AN differed markedly in different places in China and were higher in the kernel than in the husk, and higher in dried AN than in fresh AN. Arecoline had the strongest reduction effect on human SM and the effect was strongly dose dependent. Arecaidine had a much weaker reduction effect than arecoline, and guvacine had the least reduction effect. These findings also demonstrate that betel quid could have adverse effects on the gonadal functions of betel quid consumers.     

槟榔下脚料中槟榔碱的提取工艺及应用研究

以槟榔核为原料,采用酸水提取法提取槟榔碱,通过单因素试验考察了粉碎粒度、提取时间、提取温度、料液比、盐酸质量浓度、提取次数对槟榔碱影响,再用Box-behnken响应面设计法建立时间、温度和盐酸质量浓度的二次多项式模型,优化提取工艺;并将最优提取工艺得到的槟榔碱提取物应用至槟榔生产中以考察其对槟榔产品品质的影响.结果表...     

槟榔及其产品中生物碱成分的反相离子对高效液相色谱法测定

通过反相离子对高效液相色谱法测定了槟榔及其产品中的生物碱.采用Hypersil BDS Cn(250×4.6mm,5μm)色谱柱,柱温60℃;流动相为水-甲醇-磷酸-SDS(55ml:45ml:0.1ml:1g),流速为1.0ml/min;采用SPD-20A紫外检测器,检测波长为215nm.结果显示,槟榔碱和槟榔次碱在25min内分离良好.测定的精密度为0.87%～1.58%,加标回收率为96.77%～100.23%.应用该方法对槟榔及其产品中槟榔碱和槟榔次碱的含量进行了测定分析.