指示剂

In this paper, we have studied different types of indicators which can be used in alkalimetry, the results suggested that helianthine-triphenylrosaniline (1:1) mixed indicator can instruct color changes of titration end significantly, the accuracy and reproducible are good.

研究了用于碱量法测定的不同种类指示剂，结果表明：甲基橙－亚甲基蓝(1：1)混合指示剂终点颜色变化明显，准确性和重现性好，可以作为测定壳聚糖不同脱乙酰度的通用指示剂，解决了目前碱量法存在的通用性和毒害问题。

Boracic acid and mixed indicator are used as the solution to absorb ammonia.

本文采用微型化学实验方法，选择硼酸混合指示剂作为吸收氨气的溶液，当溶液变为碱性时，指示剂马上由红紫色变为亮绿色。

In Chapter 2, using 1,10-phenanthroline as the raw material, four ligands such as dipyrido[3,2-a:2',3'-c]phenazine,tetrapyrido[3,2-a:2',3'-c:3'',2''-h:2''',3'''-j]phenazine, 10,11-[1,4-naphtalendione] dipyrido [3,2,-a::2',3'-c] phenazine and 2-[4-hydroxylphenyl]imidazo [4,5-f] [1,10] phenanthroline were synthesized.

在此基础上研究配合物结构和性质上的变化，探索荧光指示剂结构与性质内在联系的规律，为光纤氧传感器提供荧光效率高、化学稳定性好的指示剂。

The mixed indicator of thymolphthalein with phenolphthalein was applied as the new indicator for the determination of maleic anhydride.

提出了采用百里酚酞和酚酞混合指示剂作为顺丁烯二酸酐含量测定的新指示剂。

4 Add 6 to 8 drops of the phenolphthalein indicator solution to the bottles and titrate to a pink end point with 0.5 N NaOH solution.

10.1.4 在瓶子里加入6到8滴的酚酞指示剂溶液来作为滴定0.5 mol/l 的NaOH 溶液的指示剂，直到溶液变成粉红色

An acid/base indicator is a weak organic acid or a weak organic base whose undissociated from differs in color form its conjugate base or its conjugate acid form.

酸碱指示剂一般是弱的有机酸或有机碱，其中酸式及其共轭碱式具有不同的颜色，当滴定至等当点时，过量的酸或碱使指示剂得到或失去质子，由碱式变为酸式，引起颜色的变化。

Cal-Red is often prepared to solid indicator because its solution is unstable.

由于钙指示剂的水溶液不稳定，通常将其配制成固体指示剂使用，但是存在着生成的络合物不够稳定、终点变色不敏锐、准确度不高等问题。

This project studies, use PH indicator (bromic phenol orchid with bromic cresol green), to different object face (be like plastic board, ceramic tile of Brown paper, thick hard paper, thick chipboard, china, bathroom and cotton cloth) planar dirt shoe imprints had a test, made with reagent of salt of sulfur cyanic acid quite, discover PH indicator is more effective.

本项目研究，使用PH指示剂，对不同的客体表面（如塑料板、褐色纸张、厚硬纸张、厚硬纸板、瓷器、浴室瓷砖和棉布等）的平面灰尘鞋印进行了试验，并与硫氰酸盐试剂作了比较，发现PH指示剂更为有效。

At the same time, using bromocresol green - methyl red indicator and phenolphthalein indicator control instructions with the free acid end of the titration end sensitive and accurate.

同时，采用溴甲酚绿-甲基红指示剂与酚酞指示剂配合指示调控游离酸的终点，使滴定终点灵敏、结果准确。

A mixed indicator composed of bromocresol green, methyl red and phenalphthalein was used as indicator in titration of boron after the inteterience of cobalt was masked by EDTA.

采用甘露醇强化硼酸滴定硼时，以EDTA为掩蔽剂，可消除二价钴对硼分析的干扰；改用溴甲酚绿-甲基红-酚酞三元混合指示剂作为测定硼的指示剂，使滴定终点灵敏，准确。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了