查询词典 trace

The method for the determination of trace level of bromate in drinking water by ion chromatography with direct injection was optimized.

对直接测定饮用水中痕量溴酸盐的离子色谱方法进行了优化。

A new method for the determination of trace bromate in water is introduced using phenol derivatization followed by HPLC-UV detection.

针对水中微量溴酸盐的测定问题，建立了一种用苯酚为衍生试剂、用HPLC-UV检测的柱外衍生测定方法。

The method is based on the catalytic effect of trace formaldehyde on the reaction between potassium bromate and Azur A .

研究了在H2SO4介质中，微量甲醛对KBrO3氧化天青A 有较强的催化作用，建立了催化光度法测定微量甲醛的新方法。

A new method for the determination of trace bromate is proposed in this paper. The optimum conditions for the oxidation of rhodamine B by bromate in hydrochloric acid medium are studied.

研究了罗丹明B与BrO3的褪色反应，确定了最佳反应条件，建立了一种光度法测量微量溴酸根离子的新方法。

A new color-fading spectrophotometric method for determining trace amount of bromate was developed.

基于6mol/L盐酸介质中溴酸根氧化甲苯胺蓝的退色反应，建立了测定微量溴酸根的新的退色光度分析方法。

Based on the catalytic effects of trace formaldehyde on the reaction between potassium bromate and oxidized azur A,a new catalytic spectrophotometric method has been developed in this paper.

基于在一定温度和硫酸介质中，痕量甲醛对溴酸钾氧化天青A 有较强的催化作用，建立了测定痕量甲醛的新的催化光度法。

Trace bromate in drinking water was determined by ion chromatography with suppressed conductivity detector.

摘 要：采用抑制电导离子色谱法检测饮用水中的痕量溴酸盐。

A novel method for the determination of trace bromate in water is proposed which employ GC-ECD. The derivative process with acetylacetone is optimized.

研究了用GC-ECD测定水中痕量溴酸盐浓度的方法，优化了用工程丙酮作溴酸根衍生化试剂的反应条件。

Objective: To develop a method for the determination of trace bromate in drinking water by high performance ion chromatography with large volumn direct injection.

目的：建立一种简单快速，采用直接大体积进样，电导检测饮用水中痕量溴酸盐的高效离子色谱法。

Aim To study the determination of trace bromide by the method of catalytic kinetic determination.

目的 研究测定溴离子的催化动力学分析方法。

They have quite a lot of work to do.

他们有许多工作要做。

Let us give you a more elaborate example of this process.

让我们给你这个过程的更多的详细例子。