2010
DOI: 10.1016/j.saa.2010.05.031
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Spectrophotometric method for the determination, validation, spectroscopic and thermal analysis of diphenhydramine in pharmaceutical preparation

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Cited by 20 publications
(10 citation statements)
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“…Upon interaction with poly(glutamic acid) to form stable complexes the endothermic peak increased to 238°C and the exothermic peak to 245°C [28]. On a separate study, the DPH showed one degradation step at 190-330°C corresponding to the loss of DPH and the weight loss of this step was 92% [35]. In the present study, the peak decomposition temperature was at 254°C with a shoulder at 192°C for crystalline DPH (Fig.…”
Section: Tg-dtg Analysessupporting
confidence: 50%
“…Upon interaction with poly(glutamic acid) to form stable complexes the endothermic peak increased to 238°C and the exothermic peak to 245°C [28]. On a separate study, the DPH showed one degradation step at 190-330°C corresponding to the loss of DPH and the weight loss of this step was 92% [35]. In the present study, the peak decomposition temperature was at 254°C with a shoulder at 192°C for crystalline DPH (Fig.…”
Section: Tg-dtg Analysessupporting
confidence: 50%
“…Methods that use reactions between different dyes and diphenhydramine are based on the formation of a complex between anionic dyes and positively charged basic groups in acid medium, which results in a coloured complex with strong absorption in the visible range of electromagnetic spectrum [8][9][10][11]. Although they present appropriate parameters of validation, they also exhibit some limitations in formulations where active ingredients are mixed with diphenhydramine-like basic groups.…”
Section: Discussionmentioning
confidence: 99%
“…Some methods for diphenhydramine analysis propose the extraction of a coloured complex formed between the analyte and some dye, such as eriochrome black T, bromocresol purple, methyl orange, bromocresol green and rose bengal, using organic solvents. These methods provide an improved capacity of detection and drug selectivity, but their extraction requires the use of an organic solvent of the formed complex [8][9][10][11].…”
Section: Introductionmentioning
confidence: 99%
“…The samples were previously prepared and transferred to sealed tubes and refrigerated at 4 °C or maintained at different temperatures (25 and 37 °C) for 24 h prior to analysis. Assays were performed three times under the same conditions (ANVISA, 2003;Ulu, Elmali, 2010).…”
Section: Robustnessmentioning
confidence: 99%