查询词典 without a trace

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。

We can trace the line of human progress far back towards brutishness; finding as we go back the noble faculties peculiar to man weaker and weaker in their manifestations, producing less and less effect,-at last scarcely any effect at all- upon his position and habits.

我们可以溯人类进化之路回到如野兽般的人；发现当我们回到人类独有的高贵本领在他们的表现中越来越弱，生产效力越来越低，最后几乎根本没有任何效力时，他的处境和习性。

Observers began to note the emergence of identifiable facial features and one can trace the reaction in contemporary magazines such as Road and Track to such nicknames as the 1948 'fishmouth' Oldsmobile or the 1950 'bucktooth' Buick.

观察者开始记录识别性前脸特征的出现，人们可以在当时的杂志例如 Road and Track 上追溯车辆衍变的轨迹，例如绰号为fishmouth的1948年 Oldsmobile和 1950 年的'bucktooth'别克。

Water purifiers in a variety of tap water to remove harmful substances and pollutants at the same time, the human body retains the beneficial minerals and trace elements, to capture the bulk water due to long storage time easy to breed bacteria, and shorter shelf-life problems .

净水器在去除自来水中的各种有害物质和污染物的同时，保留了对人体有益的矿物质和微量元素，攻克了桶装水因存放时间久容易滋生细菌、保质期短等难题。

When I started coding, I had problems with the ASF file writer.

当我开始编码，我曾与ASF文件作家的问题。

I know that in one of the schools the boys have risen up in the classroom and enlisted in a mass.

如果你们也和他们一样，是集体自愿的话，你们的老师将是多么地光荣啊。