International Journal of Analytical Chemistry / 2019 / Article / Fig 3

Research Article

Investigation of Acid-Base Indicator Property of Plumbagin from Plumbago zeylanica Linn

Figure 3

Mean ± SEM of reaction endpoints and indicator errors from titrations with plumbagin, methyl orange, and phenolphthalein. (a) Mean ± SEM of endpoint for titration of HCl with NaOH. (b) Mean ± SEM of endpoint for titration of CH3COOH with NaOH. (c) Indicator errors of plumbagin and methyl orange in titration of HCl with NaOH. (d) Indicator errors of plumbagin and phenolphthalein in titration of CH3COOH with NaOH. Each bar represents mean ± SEM of endpoints/indicator errors; SEM: standard error of mean.
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