Abstract
The precipitation of bismuth quinolin-8-olate by the conventional method could not be employed for the gravimetric determination of the metal owing to uncertainty of its stability at higher temperatures. These difficulties were overcome by precipitating bismuth quinolin-8-olate from homogeneous solution utilising urea hydrolysis to increase the pH of the acidic solution in the presence of sodium acetate. Results obtained from gravimetric and thermogravimetric measurements showed that the precipitate could be weighed as the monohydrate after drying at 105 °C, as the anhydrous complex after drying at 150 °C or as an oxide after ignition of the complex above 540 °C.
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