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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/17182

Title: Colorimetric determination of piperazine with p-benzoquinone.
Authors: A.-A. M. Wahbi
M. A. Abounassif
E. A. Gad-Kariem
Issue Date: 1986
Publisher: Talanta
Abstract: Piperazine (I) and its salts were treated with 1% of p-benzoquinone in 95% ethanol (buffered at pH 5.4) to give a red soln. (max. intensity after 30 min) with an absorption max. at 516 nm. Beer's law was obeyed over the range 2 to 10 µg ml-1 for I and 4 to 20 µg ml-1 for its salts. The ɛ values of I, I dihydrochloride and I phosphate were 9600, and of I citrate 29,700. When applied to three commercial pharmaceutical preparations, mean recoveries were within 1% of those obtained by the official gravimetric method, with coeff. of variation of <1%.
URI: http://hdl.handle.net/123456789/17182
Appears in Collections:College of Pharmacy

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