查询词典 phenolphthalein

Has founded the factory for over 20 years, our company has already established long and steady stock relation with a lot of domestic and international pharmacy, food, chemical industry, scientific research enterprise, According to the green phenolphthalein reliable product quality of the willow, good prestige has gained the masses of users' trust.

建厂二十多年来，我公司已同国内外多个制药、食品、化工、科研企业建立了长期稳定的供货关系，凭着柳青酚酞可靠的产品质量，良好的信誉赢得了广大用户的信任。

The present work describes a new method for trace Co preconcentration and separation using microcrystalline phenolphthalein as an adsorbent coupled with the determination of spectrophotometry.

建立了一种以微晶酚酞作为固态吸附剂对样品中痕量的Co分离富集的新方法，富集后的co可直接用光度法测定。

Several experiments were desighned to reveeal the reaction mechanism of phenolphthalein during its condensating with DCDPS in presence of potassium carbonate.

利用13C-NMR方法研究了弱碱K2CO3存在下酚酞成盐反应及其与活性双卤砜亲核缩聚反应过程中的结构特征。

6 To the bottles resered as blanks, melt the ice, add 6 to 8 drops of the phenolphthalein indicator solution to the bottles and titrate to a pink end point.

10.1.6 保留空白样品的瓶子，直接加入融化的冰，在瓶子里加入6到8滴的酚酞指示剂溶液来标示滴定终点。

8 Add 6 to 8 drops of the phenolphthalein indicator to each bottle and titrate with 0.1 N H2SO 4 just to the disappearance of the pink color.

10.1.8 在每个瓶子中加入6到8滴酚酞溶液，再逐步加入0.1mol/lH2SO 4至粉红色消失

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。

This paper presents a rapid method for the characterization of sulphonated condensationpolymerized products of phenolphthalein and dichlorodiphenylsulfone membrane by using infrared attenuated total reflection and diffuse reflectance spectroscopy.

采用漫反射及衰减全反射红外技术，快速鉴定酞侧基聚砜膜的改性水平，得到了磺化后—SO3H基团的红外光谱差谱。

Through modifying proportions of potassium nitrate, sulfur, phenolophthalein and potassium hydrate, formula of charcoal-free black powder is optimized by replacing charcoal with reactant of phenolphthalein and potassium hydrate.

以酚酞和氢氧化钾的反应物替代木炭，通过调整硝酸钾、硫磺、酚酞及氢氧化钾的混合比例对无木炭黑火药配方进行优化设计，对比研究了普通黑火药与无木炭黑火药在机械感度、静电火花感度、热分解过程及输出特性等方面的差异。

By using phenolphthalein and methyl orange as indicators, free alkali, zinc and sodium carbonate were titrated with hydrochloric acid and zinc was titrated with EDTA.

提出了EDTA络合滴定和酸碱滴定联合测定碱法炼锌中含锌碱性溶液中游离碱、锌和碳酸钠的新方法。

By the use of standard substance, a standard spectrum library was established for 10 drugs, metformin, ephedrine, pseudoephedrine, caffeine, phenformin, fenfluramine, indapamide, phenolphthalein, fluoxetine and sibutramine. The identification for illegally added drugs was performed by comparing the accordance of retention time and the three-grade mass spectrum with the standard spectrum library.

利用标准物质建立10种药物（二甲双胍、麻黄碱、伪麻黄碱、咖啡因、苯乙双胍、芬氟拉明、吲达帕胺、酚酞、氟西汀、西布曲明）标准谱库，通过与标准谱库保留时间和三级质谱图的比较对非法添加的药物进行定性鉴别。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。