查询词典 ion-pair

Objective To develop an ion chromatogram method for determination of fluoride in the sea food and meat.

目的 研究探讨一种适用于海产品、肉制品中氟含量测定的离子色谱检测方法。

Based on the obtained papers, we discuss the retention mechanism static ion chromatogram.

本文 在已有的研究基础上，探讨了静电离子色谱的保留机制。

The essay introduces a new way to measure the total nitrogen of surface water in ion chromatograph .

本文提出了采用离子色谱法测定地表水中总氮的新方法，对离子色谱条件和流动相的选择进行了研究，方法具有良好的精确度、准确度，用于实际样品分析，结果令人满意。

1 Ion Chromatograph capable of 50 ppb or better detection.

4.1 检测极限为50 ppb或检测能力更强的离子色谱仪。

Objective: To establish a ion chromatography method for determination of phosphorus oxychloride in air of workplace.

目的：建立一种用离子色谱测定工作场所空气中的三氯氧磷的检测方法。

Objective:To establish a method for determination of sulfur dioxide in disposable chopsticks by ion chromatography.

目的：建立一次性筷子中二氧化硫的离子色谱测定方法。

A new cinchonine ion selective electrode was prepared by dipping the Ag/AgCl electrode into the sol-gel solution for more than 3 times, and then standing for 48h at room temperature, and finally activating for at least 12h in a 1.0×10^(-2)molL^(-1) cinchonine solution.

将Ag/AgCl电极于溶胶－凝胶溶液中反复浸3次以上，在室温静置48h后在1.0×10^(-2)molL^(-1)，辛可宁溶液中活化至少12h即制成新型的辛可宁选择性电极。

The results of the reaction show that better regioselectivity is obtained when Cd2+ is used as additive and give stereoselective product when cinchonine is used as chiral additive.Keywords: NaBH4, Regioselective,Stereoselective,Benzoyl acetone,Metal ion

结果发现，不同的金属离子添加剂使反应出现不同的化学选择性，而Cd2+离子对苯甲酰丙酮的还原具有较好的化学选择性，同时在辛可宁存在条件下得到了对映体过量的产物。

In this paper the quantitative method for citric acid in electropolishing solution by ion chromatography is described.

研究用离子色谱法对电镀抛光液中柠檬酸的测定方法，选择合适的分离条件，使电镀抛光液中磷酸、硫酸和柠檬酸得到很好的分离。

Planning theory and method, Social and economic analysis, Environment protect ion and resource utilization, Planning analysis technology and method, Civicism architecture are five main subjects of urban planning education in the world today.

从国际城市规划学科发展潮流看，规划理论与方法、社会经济分析、环境保护与资源利用、规划分析技术与方法以及市政建筑工程等成为城市规划专业教育的五大支柱学科。

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。