产品名称 : | PH1834 | 0.5%铬黑T指示剂 Eriochrome Black T Indicator (0.5%) |
产品品牌 : | 飞净 PHYGENE |
测定水硬度用指示剂,金属络合指示剂,测定钙、镁、钡、姻、锰、铅、钪、锶、锌和锆。
常温运输与保存,12个月有效
Eriochrome Black T is a complexometric indicator that is used in complexometric titrations, e.g. in the water hardness determination process. It is an azo dye.
In its protonated form, Eriochrome Black T is blue. It turns red when it forms a complex with calcium, magnesium, or other metal ions.
Applications
When used as an indicator in an EDTA titration, the characteristic blue end-point is reached when sufficient EDTA is added and the metal ions bound to the indicator are chelated by EDTA, leaving the free indicator molecule.
Eriochrome Black T has also been used to detect the presence of rare earth metals.
References
^ http://www.sigmaaldrich.com/catalog/product/sial/858390?lang=en®ion=US
^ Dubenskaya, L. O.; Levitskaya, G. D. (1999). "Use of eriochrome black T for the polarographic determination of rare-earth metals". Journal of Analytical Chemistry. 54 (7): 655–657. ISSN 1061-9348.
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