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单词 Universal indicator
释义

Universal indicator

原声例句
里奇大叔带你欧洲行

After years of searching out my favorite European restaurants, I've found a few universal indicators for a great eating value. And this place has them all.

经过多年寻找我最喜欢的欧洲餐厅, 我发现了一些衡量高饮食价值的通用指标。而这个地方拥有所有这些。

中文百科

广范试剂

广用试纸
A roll of universal indicator paper
Colours of universal indicator
Colour Change of Universal Indicator after immersing into Basic NaOH solution.Universal Indicator Test KitColour Change of Universal Indicator after immersing into a Neutral solution

广用试剂,又名通用指示剂或广范试剂。一般用来指示溶液的酸碱性,并可以指示酸性和碱性范围内的各种pH值,其变色之 pH 范围如下表:   

pH值<4,颜色皆为

pH值>10,颜色皆为

广范试剂是pH指示剂的一种,其适用范围为pH3~12,可用以显示不同溶液之酸碱度。虽然市面上有多种不同的广范试剂,但大部分都是从山田所获得专利的配方变化而来的。 这个专利细节可以在化学文摘找到。 有关山田的广范试剂之实验也刊登在化学教育学报。

英语百科

Universal indicator 广范试剂

A roll of universal indicator paper
Colours of universal indicator
Colour Change of Universal Indicator after immersing into Basic NaOH solution.Universal Indicator Test KitColour Change of Universal Indicator after immersing into a Neutral solution

A universal indicator is a pH indicator composed of a solution of several compounds that exhibits several smooth colour changes over a pH value range from 1 to 14 to indicate the acidity or alkalinity of solutions. Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933. Details of this patent can be found in Chemical Abstracts. Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.

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更新时间:2025/6/21 2:58:23