光度测定

In this paper, the determination of trace elements including copper, manganese,cobalt, nikel and chromium in lead metasilicate by atomic absorption spectroscopyhas been investigated.

本文提出用火焰原子吸收分光光度法测定硅酸铅中的微量元素铜、锰、钴、镍和铬，并探索了样品中可能存在的干扰元素及溶剂介质酸度对测定的影响。

The experimental results have shown that ofloxacin in HCl (0. 1 mol/L)solution has maximum absorptivity at 293nm. Good linear correlation is seen between concentrations of ofloxacin in the range of 18 μg/ml and their absorptlvity. The results of experiment of stability show that light and heat have almost no effect on ofloxacin otic Solution. The validity is two ...

实验结果表明氧氟沙星用盐酸作溶剂在紫外区有最大吸收，最大吸收波长为293nm，在测定范围内（1－8μg／ml）浓度与吸光度呈线性关系；药用辅料对浦耳液中氧氟沙星的含量测定无干扰；稳定性试验表明光、热对氧氟沙星滴耳液（pH＝6－7）的含量影响不大，根据加速试验和室温留样试验可将本品有效期定为二年。

Mm, 5 μm and a UV detector. Elution was performed at a flow rate of 1 mL/min, with a gradient of methanol-acetonitrile-water starting at 80∶10∶10, increasing linearly to 86∶10∶4 in 35 min, then returning to the initial conditions in 5 min. Elution of phenacyl esters was monitored by absorbance at 254 nm. Pentadecanoic acid was used to be an internal standard.

分析所用色谱柱为ZORBAXSB C18柱，以十七酸作为内标，甲醇-乙腈-水为流动相，采用梯度洗脱(梯度洗脱程序为甲醇-乙腈-水由80∶10∶10在35 min内线性变化到86∶10∶4，然后在5 min内恢复到起始比例，流动相流速为1 mL/min)，通过测定苯乙酰甲酯在254 nm处的吸光度值来测定脂肪酸含量。

The hydroxyl free radical scavenging rate was determined by phenanthroline spectrophotometry, and the antilipoperoxidant was determined by colorimetry.

采用邻二氮菲分光光度法测定经自由基的清除率，比色法测定其对脂质过氧化的抑制作用。

The iron content was determined by phenanthroline photometry, and T(2) values as well as relaxivity evaluated with a clinical MR system at 1.5T.

用菲咯啉光度法测定铁含量，并用临床用核磁共振系统在1.5T强度下测定T(2)值和弛豫效率。

In the rapid ampoule determination of low concentration iron in water phenanthroline is used as developing agent.

测定条件；油田水分析；中低浓度；吸光度；准确度；铁含量；快速测定法；铁水样；目视比色法；灵敏度

Using tin bichloride-glycerol mixed solution as reductant,the determination method of phosphorus content for bioceramic base-material-β-calcium phosphate with phosphomolybdate blue spectrophotometry has been established.

以二氯化锡-甘油混合液作还原剂，建立了用磷钼蓝分光光度法测定生物陶瓷基材β-磷酸钙中磷含量的方法，确定了最佳测定条件。

Traction and by adoption of spectrophotometry to direct measurement of concentration of picric acid in desulfurized solution, a new method for determination of the concentration of picric acid in desulfurized solution.

摘 要：通过苦味酸与结晶紫缔合，利用环己烷萃取，采用分光光度法直接测定脱硫液中苦味酸的浓度，从而建立了1种测定脱硫液中苦味酸的新方法。

Aiming at the disturbing of trace tin and trace germanium in existing simultaneous, using Artificial Neural Networks spectrometry determined simultaneously trace tin and trace germanium in extraction raffinate and stripping raffinate, tested the effect of these two metal separation and extraction.

针对微量锡与微量锗同时存在下相互干扰测定的困难进行研究，利用人工神经网络光度法比较准确的同时测定出萃余水相和反萃取水相中的微量锡与微量锗的含量，验证了两者的分离富集的效果。

objective:to determine total flavonoids content in the leaves of acer saccharum.methods:we determined total flavonoids contents in leaves of acer saccharum by ultraviolet and visible spectrophotometry.results:the flavonoids content was 1.035mg/g in the leaves of acer saccharum.conclusion:the flavonoids content is rich in the leaves of acer saccharum and the leaves have pharmic value.

目的：本文对糖槭叶中的总黄酮含量进行测定。方法：采用紫外-可见分光光度法对糖槭叶中总黄酮含量进行测定。结果：糖槭叶中总黄酮含量为1.035mg/g。结论：糖槭叶中含有丰富的黄酮类化合物，具有可观的药用开发价值。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。