醋酸测定法

The aliquot was determined and confirmed by gas chromatography-negative chemical ionization mass spectrometry using external standard method.

样品中三唑醇残留物由正己烷饱和的乙腈(含1%冰醋酸)提取，加入无水硫酸镁与无水醋酸钠振荡促使提取液分层后进行固相分散萃取净化，用气相色谱-负化学离子源质谱法进行测定与确证，外标法定量。

Three-electrode system to sodium acetate - acetic acid, potassium chloride and mercury chloride solution to end solution, by stripping square wave voltammetry method for the determination of trace sewage cadmium.

采用三电极工作系统，以醋酸钠—醋酸，氯化钾和氯化汞溶液为底液，用方波溶出伏安法测定了污水中的微量镉。

Pollen viability, stigmatic receptivity, the color of anther and stigma of 5 Iris plants were observed during blooming. Result:①The highest pollen viability was in 4 hours after blooming;②The stigmatic receptivities of I.

用醋酸洋红法测定了白花马蔺、马蔺、四川鸢尾、薄叶鸢尾和锐果鸢尾5种植物的花粉活力，用联苯胺-过氧化氢法测定其柱头可授性，同时观测了花药颜色变化和柱头颜色变化。

In this dissertation, firstly, the conditions of isolation and purification of specific toxin fractions produced by Exserohilum turcicum has been studied, and a high-efficient method has been established;secondly, the toxins were analysed by UV-Vis spectrophotometry;then the effect of specific toxin on death rate of corn leaves protoplast was studied by FDA as a tinct reagent;finally, using ANS as a probe and SDS-PAGE to study the membrane protein of the corn leaves with Htl gene. In a word, the aim of the research is to search some existent evidences of the toxin binding site on protoplasmic membrane, and provide proofs for nosogenesis of specific toxin in terms of cytology and the molecular biology.

本研究对玉米大斑病菌1号小种毒素的特异性组分进行分离，建立了高效的特异性毒素分离纯化方法，并对其进行了紫外波谱分析；用荧光素双醋酸酯染色法，测定了毒素特异性组分对原生质体死亡率的影响；进而用1-苯胺基-8-萘磺酸荧光探针标记法和SDS-PAGE电泳法对特异性毒素组分与Htl基因玉米细胞互作过程中的质膜蛋白进行了研究，旨在证明Htl基因玉米细胞质膜上存在特异性毒素组分结合蛋白，为从细胞和分子生物学角度阐明毒素的致病机理提供证据。

The HPLC system column, mobile phase of CH3CN-3%CH3COOH (11∶89) mixture, with detection wave at 270 nm, was used to determine the content of vitexin in Leaf of Crataegus pinnatifida Bge.

应用反相高效液相色谱法测定了山楂叶总黄酮中牡荆素的含量。C18柱作为色谱柱，乙腈-3%醋酸水溶液(11∶89)为流动相，检测波长270 nm，按外标法定量。

A new catalytic spectrophotometry was established for the determination of trace silver based on the catalytic effect of Ag on the oxidational discoloration reaction of methyl violet with potassium persulfate in buffer medium of HAc-NaAc including phenothroline as activator.

在醋酸－醋酸钠缓冲介质中，有活化剂邻二氮菲存在时，Ag对过硫酸钾氧化甲基紫褪色反应有催化作用，建立了测定痕量银的新催化光度法。

The product has green-yellow fluorescence at excitation wavelength of 355 nm and emission wavelength of 478 nm, and the fluorescence intensity could be enhanced in the presence of acetone.

三、流动注射在线氧化荧光法测定氯普噻吨的的研究利用在硫酸介质中二氧化铅可使无天然荧光的氯普噻吨氧化而转变为在最大激发波长和最大发射波长分别为393nm和452nm的强荧光物质，而且丙酮对该荧光体系有强烈增敏作用的现象，建立了以醋酸纤维素固定化的二氧化铅作为固相反应器的流动注射在线氧化荧光法测定氯普噻吨的新方法。

Flow injection fluorometry for the determination of carbamazepine in pharmaceuticals and plasmaA simple, sensitive and specific spectrofluorimetric method has been developed for the determination of CBZ. The method was based on lead dioxide solid-phase reactor flow injection on-line oxidizing CBZ into fluorescent product in medium of phosphoric acid. The product has green-yellow fluorescence at excitation wavelength of 355 nm and emission wavelength of 478 nm, and the fluorescence intensity could be enhanced in the presence of acetone. The reaction conditions and experimental conditions were studied and optimized.

二、流动注射在线氧化荧光法测定卡马西平的研究利用卡马西平自身无荧光，经过氧化后可转变为在最大激发波长为355nm，最大发射波长为478nm的强荧光物质，而且丙酮对该荧光体系有增敏作用的现象，应用流动注射体系建立了以醋酸纤维素固定化的二氧化铅作为固相反应器、在磷酸介质中在线氧化荧光法测定卡马西平的新方法。

Objective To establish HPLC-UV method for determination of glycyrrhizin acid in compound nasal spray of glycyrrhizin and flower flos magnoliae,the chief active ingredient of formulation,glycyrrhizin acid,and to observethe therapeutic effect of this formulation on guinea pig's hypersensitive rhinitis.Methods A compound nasal spray formulation was prepared using extracts of glycyrrhizin and measured by HPLC-UV method.Mobile phase conˉsisted of methanol,0.2mol/L ammonium acetate and glacial acetic acid（67:33:1,v/v）,analytical column was Zorbax ODS C 18 and wavelength250nm.

目的 建立测定复方甘草和辛夷喷雾剂含量的方法并观察该制剂对豚鼠超敏性鼻炎的疗效方法以甘草提取的甘草甜素和辛夷花蒸馏提取液主药制备成鼻用喷雾剂，用反相高效液相色谱法测定制剂中甘草酸含量，检测波长为250nm，Zorbax ODS C 18 分析柱，流动相为甲醇：0.2mol/L醋酸铵：冰醋酸（67：33：1）。

Content determination of Cholic acid of Sanchenwan pill using Scanning method of thin layer.

用薄层扫描法测定胆酸的含量。选用硅酸G薄层板，展开剂为正己烷∶乙酸乙酯∶醋酸∶甲酸(6∶3 2∶1∶1)；测定波长：62 0nm 。试验表明，本法线性关系良好(r =0 。9984)，平均回收率为 98.2 7%，RSD =2 。1%，方法简便、准确、重现性

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。