Reactions between alkaloids and bismuth iodide,the compounds formed and their analytical application : A heterometric study

The reactions between nitron, quinine, cinchonine, strychnine, sparteine, papaverine, rivanol, acriflavine, phenanthroline, antipyrine and atropine with bismuth nitrate in potassium iodide solution were studied heterometrically. The individual structure of the N-compounds was discussed on the basis of the reactions and the large salt-compounds obtained 0.5 to 1 mg of N-compound was necessary for a determination which lasted 10–15 min. The errors in almost all cases were negligible 0.3–0.5 mg bismuth could also be determined by the titration of bismuth with N-compounds and the error was negligible.