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Phenolphthalein
Phenolphthalein /ˌfiːnɒlfˈθeɪliːn/ is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notatio... |
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pH Indicators - Chemistry help - Tutorvista.com
For example, in volumetric analysis, during the titration of sodium hydroxide with hydrochloric acid (titrant in the burette), phenolphthalein turns pink to colorless ... |
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Evaluation of Six Presumptive Tests for Blood, Their Specificity ...
Leuchomalachite green was as specific to blood as luminol, but its sensitivity was 10 times less, and it destroyed the DNA. Phenolphthalein had equal sensitivity ... |
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CHAPTER XVI VOLUMETRIC METHODS
This may be an internal indicator (e.g., phenolphthalein) or an external indicator ( e.g., pH ... .. The potentiometric method also suffers from some disadvantages. |
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Indicators
Phenolphthalein in the table above has a pKai value of 9.7, which is the closest to the pH of equivalence point in this titration. This indicator is colorless in acidic ... |
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Kastle-Meyer Test To Detect Blood - Chemistry - About.com
This is a phenolphthalein solution, which should be colorless or pale yellow. If the solution is pink or if it turns pink when added to the swab, then the solution is ... |
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1 - Cambridge Journals
The test to be described has none of these disadvantages. This test ... The colour of the phenolphthalein can be detected in the presence of the constituents. |
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Patent US1583372 - Purification of phenolphthalein - Google Patents
This invention relates to an improved method of purifying phenolphthalein. ... The disadvantages of the heretofore proposed methods f purifying phenolphthalein ... |
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Patent US2192485 - Process of producing phenolphthalein - Google ...
Phenolphthalein is obtained by the condensation of phenol with phthalic anhydride inthe presence of a condensing agent, many ... It has several disadvantages. |