痕量溴的阻抑动力学荧光法测定

基于在磷酸介质中溴对溴酸钾氧化丁基罗丹明B反应的抑制作用，建立了痕量溴的阻抑动力学荧光分析的新方法；应用单纯形最优化法确定了 实验条件，方法的检出限0.075μg/L，线性范围0.40-6.40μg/L；将该法应用于地下水、人发中溴的分析，获得满意结果，并对反应机理进行了初步探讨。     

硫酸颜色反应用于荧光法测定利血平研究

提出了硫酸颜色反应用于利血平的荧光分析新方法。利用血平与浓硫酸反应，生成强荧光物质，所得产物的荧光强度与利血平的浓度在０－０．６μｇ／ｍＬ范围内有良好的线性关系。检测限为０．２ｎｇ／ｍＬ。本法可直接用于尿液中利血平的定量分析，回收率为８２．５％－８４．２％。     

一类新偶氮试剂的研究：Ⅴ.HQSAH催化荧光法测定Mn（Ⅱ）

基于Ｍｎ（Ⅱ）对试剂２－（８＇－羟基喹啉－５＇－磺基－７＇－偶氮基）－１－羟基－８－氨基一萘二磺酸（以下简称ＨＱＳＡＨ）分解反应的催化作用，提出了锰的荧光催化动力学分析新方法，其λｅｘ／ｅｍ＝２３０／４１５ｎｍ，适宜酸度范围为ｐＨ１１．０～１２．０，Ｍｎ（Ⅱ）含量在０～０．０８μｇ／ｍＬ呈线性关系，该法用于分析铸造铝合金中的痕量锰，效果良好。还初步探讨了反应机制，确定了反应动力学方程，测定了反应速率和活化能。     

光谱法研究水溶性杯[8]芳烃对伊红的分子识别作用

采用荧光光谱法和紫外-可见光谱法研究了水溶性对-二甲氨甲基-杯[8]芳烃(简称杯[8]胺)对伊红的分子识别作用。研究发现,对-二甲氨甲基-杯[8]芳烃与伊红存在较强的静电作用,两者之间形成了2:1型的络合物,络合常数为2.1×109Lmol-1,小牛胸腺DNA对杯[8]胺-伊红络合物的稳定性有较大影响,DNA能夺取杯[8]胺-伊红络合物中的杯[8]胺,导致伊红游离,预示着杯[8]胺是良好的药物载体分子。同时考察了β-环糊精、几种常见有机溶剂和溶液的pH值等对杯[8]胺与伊红相互作用的影响,初步探讨了两者相互作用的机理。     

5—（4—甲氧基苯偶氮）—8—（苯磺酰氨基）喹啉的合成及其与钴荧光反应的研究

本文报告了５－（４－甲氧基苯偶氮）－８－（苯磺酰氨基）喹啉（ＭＯＰＢＳＱ）的合成及结构鉴定，建立了ＭＯＰＢＳＱ－吐温８０测钴的新荧光分析方法。方法的检测限为０．５ｎｇ／ｍＬ，线性范围为０～４０μｇ／Ｌ螯合物在λｅｘ／λｅｍ＝３４１ｎｍ／４０５ｎｍ和产生经烈荧光。不经分离可直接用于维生素Ｂ１２及蔬菜中痕量钴的测定。     

阻抑动力学同步荧光法测定环境水样中苯胺

在稀硫酸介质和CTMAB存在下 ,痕量苯胺对溴酸钾氧化荧光素的反应具有灵敏的阻抑作用 ,荧光素的氧化产物有强荧光 ,但其激发光谱和发射光谱严重重叠 ,文章采用同步荧光光谱法减小了谱带重叠 ,获得了很好的灵敏度和选择性 ,据此建立了阻抑动力学同步荧光法测定苯胺的新方法。方法的线性范围是 0～10 μg·L- 1 ,检测限为 0 3μg·L- 1 。用于环境水样和实验室废水中苯胺含量的测定 ,结果满意     

Determination of atorvastatin in human plasma by magnetic solid-phase extraction combined with HPLC and application to a pharmacokinetic study

A simple and sensitive analytical procedure by solid-phase extraction method combined with high-performance liquid chromatography and using of graphene–magnetite nanomaterials as sorbent has been developed for the determination of atorvastatin in human plasma. A magnetic solid-phase extraction method as a simple, fast, and efficient extraction technique has been used for sample preparation. A solid nanocomposite material, graphene nanosheets decorated with magnetite nanoparticles, was used as a magnetic adsorbent and the adsorption process was optimized in this study. RP C18 column was used with mobile phase composed of acetonitrile–10?mM orthophosphoric acid by isocratic elution with the flow rate of 1?mL?min^?1. Fluorimetric detection was used by the excitation wavelength at 282?nm and the emission wavelength at 400?nm. It was found that the calibration curve was linear in the 30–150?ng?mL^?1. Limit of detection and limit of quantitation values were found to be 10 and 30?ng?mL^?1, respectively. The intra-day and inter-day relative standard deviation values were less than 5.27%. It has been concluded that the new developed method provides fast, simple, cost reduced, and sensitive assay for atorvastatin determination in human plasma. This method is also applied to a pharmacokinetic study.     

Batch and Flow Injection Fluorimetric Determination of Fluoxetine

Abstract

A method for the fluorimetric determination of fluoxetine in continuous and discontinuous systems is reported. The method is based on the hydrolysis of fluoxetine in acid medium. The fluorescent product has a spectrum with excitation and emission maxima at 253 and 306 nm, respectively. The method was applied to the determination of fluoxetine in pharmaceutical products.     

阻抑动力学荧光法测定痕量间苯二酚

基于在ＨＣｌＯ４介质中,间苯二酚对Ｆｅ（Ⅲ）催化Ｈ２Ｏ２氧化罗丹明６Ｇ使其荧光猝灭的抑制作用,建立了动力学荧光法测定痕量间苯二酚的新方法。线性范围为０．００８～０．０９６ｍｇ／Ｌ间苯二酚,方法检测限为５．９ｕｇ／Ｌ。用于测定合成样中间苯二酚的含量,结果令人满意。