QUESTION

Fifty $(50)$ Carbamazepine tablets $($Tegretol$($R$))$

weighing $25\mathrm{.}000g$ were powdered. A $0\mathrm{.}3000g$

of the powdered sample was boiled in $50ml$

ethanol for a few minutes. The hot mixture

was stirred for $10$ minutes and filtered. The

cooled mixture was made up to $100ml$ with

ethanol. An aliquot $5ml$ of the extract was

diluted to $250ml$ with ethanol and the

absorbance of the resulting solution was

found to be $0\mathrm{.}588$ absorbance units at a

wavelength of $285nm.$