thymolphthalein


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thymolphthalein

[¦thī‚mȯl¦thā‚lēn]
(organic chemistry)
C6H4COOC[C6H2(CH3)(OH)CH(CH3)2]2 A white powder insoluble in water, soluble in alcohol and acetone, melts at 245°C; used in medicine and as an acid-base titration indicator.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Immediately, after the solution was cooked, 6-10 drops of 1% thymolphthalein indicator were added and the solution was immediately titrated with 0.1 N sodium hydroxide to the thymolphthalein endpoint [10].
The following Hammett indicators were utilized: phenolphthalein ([H.sub.-] = 8.2), thymolphthalein ([H.sub.-] = 10.0), 2,4-dinitroaniline ([H.sub.-] = 15.0), and 4-nitroaniline ([H.sub.-] = 18.4).
Rapid method for determination of alkaline phosphatase activity in human serum with thymolphthalein monophosphate.
The solution was then cooled to room temperature and titrated using thymolphthalein as the indicator until a persistent color change was obtained.
Maternal blood placental alkaline phosphatase (PAP) activity was assayed by the Thymolphthalein Monophosphate method (4) using the maternal sera samples heated at 65[degrees]C for 7 min.
This tendency was similar at the jejunum: 632; 1151; 749 and 405 ([micro]moles thymolphthalein /min/mg protein) and ileum: 107; 225; 157 y 71 ([micro]moles thymolphthalein/min/mg protein) with the same concentrations of phytic phosphorus.
One strategy involves using an acid-base indicator such as thymolphthalein, which has a deep blue color in an alkaline solution but is colorless in acidic conditions.
Analysis of breath tests: Expired [sup.14]C[O.sub.2] was collected through a calcium chloride column into a trapping agent consisting of 4 ml methylbenzethonium hydroxide and a pH colour indicator (thymolphthalein) [20].