查询词典 spectrophotometry

N-substituded thioacridones with five different structures were synthesized via a route involving Ull-man reaction, cyclization, N-alkylation and sulfurization. The structures of each thioacridone were identified with IR and MS. The results from UV-spectrophotometry show that the five N-alkythioacridones all have stronger absorption in the visible light region.

采用乌尔曼反应、酸催化环化、N-烷基化和硫代化四步反应路线合成了5种不同结构的N-取代硫代吖啶酮，利用IR和MS分析手段表征了其结构，UV分光光度计的测定结果表明5种硫代吖啶酮在可见光区都有较强的吸收。

Derivative Spectrophotometry ; Simultaneous determination ; Cu Zn ; Meso tetra （4 phenyl sulphonate） Porphyrin ; Foodstuff

导数光度法；同时测定；铜锌； meso一四（4—磺基苯基）卟琳；食品

To extract and determine the volume of polysaccharides from swertia mussotii franch ,the optimal condition is determined by the orthayonal experiment,and volume of polysaccharides is measured by spectrophotometry.

对川西獐牙菜中多糖进行提取及含量测定；通过正交实验确定提取多糖的优化条件，用分光光度法测定多糖的含量；川西獐牙菜多糖提取的最佳条件是：料液比为1：10、提取时间为2.0h、提取次数为4次、温度90℃。

In this paper, HPLC and spectrophotometry were applied respectively to study the contents of the syringin and total flavonoid, the two important secondary metobolites of Acanthopanax senticosus in three different habitats.

采用高效液相和分光光度的方法对天然次生林林内、林隙和林缘三种不同生境下刺五加主要次生代谢产物丁香苷和总黄酮的含量差异进行了研究。

Potassium Guaiacolsulfonate ; syrupus phenergani tussis ; first derivative spectrophotometry

愈创木酚磺酸钾；非那根止咳糖浆；一阶导数分光光度法

Methods:tlc was used by the same rf of the color for the identification,the content of uncaria alkaloid in rhynchophylline was determined by ultraviolet spectrophotometry.

采用tlc通过显色剂的显色比较有相同的rf进行鉴定；采用紫外分光光度法对钩藤总碱中的钩藤碱进行含量测定。

The content of uncaria alkaloid in rhynchophylline was 0.71% measured by ultraviolet spectrophotometry at 246.0 nm wavelength.

结果：本品定性鉴定薄层色谱特征明显，与标准品有相同的Rf；紫外分光光度法在246.0 nm波长处测得钩藤总碱中钩藤碱的含量为0.71%。

Results:tlc characteristic of qualtative identification of this goods was apparent,with the same rf to standard samples.the content of uncaria alkaloid in rhynchophylline was 0.71% measured by ultraviolet spectrophotometry at 246.0 nm wavelength.conclusion:this method was found to be rapid,simple,economic,accurate and reproducible.

结果：本品定性鉴定薄层色谱特征明显，与标准品有相同的rf；紫外分光光度法在246.0 nm波长处测得钩藤总碱中钩藤碱的含量为0.71%。结论：此方法快速、简便、经济、准确、重现性好。

To control the slope of standard curve in spectrophotometry by using the two kinds of graphics of Youden,we can directly find out the quality of the data,accuracy and precision of the measuring point.

应用尤登双样图对分光光度法进行标准曲线斜率的控制，能简单直观地了解数据质量，看出测点的准确度和精密度，可用同心圆确定测点所代表的标准曲线的斜率是否可接受

OBJECTIVE:To introduce a method for qualitative and quantitative determination of compound methylrosaniline chlorid solution by spectrophotometry.

目的：介绍复方甲紫溶液定性与定量检验的方法。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。