Acid-Base Indicator Properties of Synthesized Phenylhydrazones: 4-(2-(2,4-Dinitrophenyl) Hydrazono) Methyl)-2 Methoxy Phenol and 4-(2-(2,4-Dinitrophenylhydrazono) Methyl) Benzene-1,3-diol

Figure 5

Accuracy investigations involving IND-X and IND-Y. (a) Comparing results from the use of IND-X with methyl orange (MTO) in HCl/NaOH titrations (n = 10); (b) comparing results from the use of IND-Y with MTO and methyl red (MTR) in HCl/NaOH titrations (n = 10); (c) comparing results from the use of IND-X with phenolphthalein (PHEN) and phenol red (PHR) in CH₃COOH/NaOH titrations (n = 10); (d) comparing results from the use of IND-Y with phenolphthalein (PHEN) in CH₃COOH/NaOH titrations (n = 10); (e) comparing results from the use of IND-X with phenolphthalein (PHEN) in the titrimetric assay of ibuprofen powder (IBP-PWD) and ibuprofen tablets (IBP-tab) (n = 10); (f) comparing results from the use of IND-Y with phenolphthalein (PHEN) in the titrimetric assay of ibuprofen powder.

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