查询词典 spectrophotometry

A novel determination method of trace chromium in waste water by dual-wavelength spectrophotometry was established based on the fact that chromium can react with alizarin blue S to form red complex in H2SO4 medium.

在H2SO4介质中，铬与茜素蓝S形成红色产物，据此建立了双波长分光光度法测定废水中痕量铬的新方法。

Aiming at the problems occurred in the analytical process of determining the total phosphorus in industrial circulating cooling water by ammonium molybdate spectrophotometry and based on the experience summary,the original analytical method has been improved.

针对用钼酸铵分光光度法测定循环冷却水中的总磷在实际分析过程中遇到的一些问题，经过总结经验，改进了原有的分析方法，降低了测定中的干扰因素，提高了一次分析结果的准确可靠性，使分析结果更为准确可靠。

Methods:Spectrophotometry was selected to determine the phosphorus level in soya lecithin,based on the formation of the blue complex by phosphate with ammonium molybdate and Fiske-Subbarow reagent in acid solution.

将样品中的有机磷酸化合物分解转化为无机磷酸盐，再利用在酸性溶液中磷酸盐与钼酸铵及Fiske-Subbarow试剂作用生成蓝色的化合物，在660nm处用分光光度法测定。

When leaves cleared up in the aqua fortis and perchloric acid, the contents of Cu Zn and Mn can influence the measurement of flame spectrophotometry.

用浓硝酸与高氯酸消解树叶，Cu、Zn及Mn含量较高，可直接用火焰原子吸收法测定。

Methods The pyrogllol auto-oxidation was adopted to produce superoxide anion O(superscript - subscript 2; the system H2O2/Fe(superscript 2+) was used to produce hydroxy radical through Fenton reaction; and spectrophotometry was used to detect the clearing functions of drugs with different concentrations against O(superscript - subscript 2) and OH.

采用邻苯三酚自氧化法产生超氧阴离子自由基O(上标-下标 2，采用H2O2/Fe(上标 2+)体系通过Fenton反应产生羟自由基，用分光光度法分别测定不同浓度的药物对O(上标-下标 2)是和OH的清除作用。

Based on Fenton reaction and the auto-oxidation of pyrogallol, the anti-radical activity of morinda officinalis how was studied by spectrophotometry. The morinda officinalis how has obvious scavenging effects on hydroxyl radical and superoxide anion radicalO2(superscript - with the efficiency related to concentration of morinda officinalis how.

基於Fenton反应和抑制邻苯三酚自氧化原理，分光光度法测定体系吸光度的变化研究巴戟天抗自由基活性，证明巴戟天对羟自由基及超氧阴离子自由基O2(上标-均有良好的清除作用，清除率与巴戟天的浓度有一定的量效关系。

In this paper,the method for measuring water soluble Sulphate in soil by Barium Chromate Spectrophotometry is discussed as well as the experiment conditions about the rate of water soil and vibration time.

介绍铬酸钡分光光度法测定土壤中水溶性硫酸盐的分析方法，并讨论了水土比、振荡时间等实验条件。

Methods A series of improved experiments on barium chromate spectrophotometry without heating and the experiments of precision and accuracy,as well as comparison of experimental data between the improved method and the National Standard Method were carried out.

方法采用不加热方法，对铬酸钡分光光度法进行一系列改进实验，并进行了精密度及准确度试验，与国家标准方法的测定结果进行了比较实验。

With a high accuracy, the biuret in compound fertilizer is determined from the color reaction between biuret and copper by copper double salt spectrophotometry, meanwhile the remove of PO43-,Ca2+, Mg2+and NH3 interferences is described without other and new interfering matters.

利用缩二脲铜的色泽反应，采用铜复盐分光光度法测定复合肥中的缩二脲，并介绍除去PO43-，Ca2+，Mg2+，NH3干扰的方法，并且在此过程中不能引入新的干扰物质。该方法精密度较好。

Keywords Vanadium;Dual-wavelength;Dual-indicator;Catalytic spectrophotometry;Acridine orange;Acid chrome blue K

钒； 双波长；双指示剂；催化光度法；吖啶橙；酸性铬蓝K

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。