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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 7, Number 4
August 20, 1963 

Spectrophotometric Determination of Ti (Ⅳ) by means of Methylthymolblue (MTB) Complex

Methylthymolblue (MTB) 에 의한 Ti (Ⅳ) 의 흡광광도분석
Doo Won Park, Chong Nam Lee

박두원, 이종갑
A method of the colorimetric determination of titanium has been developed, based on the fact (Ⅳ) forms a stable blue complex with methylthymolblue(MTB) which is suitable for spectrophotometric determination of titanium in the concentration range of 0.2 to 22 μg per ml as TiO2. The determination was carried out in the solution of pH range of 2.6 to 3.6, and the absorbancy of complex was at 600mμ with Coleman spectrophotometer. Titanium forms a 1:1 complex with MTB, which has a molar absorptivity, 1.1×104 at 600mμ. The effects of hydrogen ion concentration, reagent concentration, stability of complex, and hydrolysis were studied. Most of cations do not interfere seriously; however, many of anions such as oxalate, citrate, phosphate, chloride interfere in this determination.
299 - 303
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