原子吸光分析法によるアルカロイド類の間接定量

概要

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Alkaloids such as strychnine, quinine, emetine, procaine, tetracaine, and ephedrine were indirectly determined with good precision by atomic absorption spectrometry (A.A.S.). The recommended procedures are as follow. To (5〜20)ml of each sample solution {(1.5〜100)μg/ml in N/10 HCl} is added with 1ml of Reinecke salt solution (Ammonium tetrathiocyanodiammonochromate 6mg/ml). After (5〜10)ml of nitrobenzene is added, the mixture is shaken for about 2min and then allowed to stand for 20min. After the nitrobenzene layer is separated it is dehydrated and the chromium in the nitrobenzene solution is measured by A.A.S. Coexisting following ions, Cu^<2+>, Co^<2+>, Mg^<2+>, Ca^<2+>, Na^+, Ni^<2+>, K^+, Pb^<2+>, Cd^<2+>, Fe^<3+>, NH_4^+, Cl^-, PO_4^<3->, Br^-, and NO_3^- in the range of (1〜^37) fold (ions/strychnine, mol/mol) did not interfere with the determination. Sodium thiosulfate, monosodium glutamate, starch and sucrose also did not interfere when the amount is less than 200 fold (compounds/strychnine, mg/mg).
社団法人日本分析化学会の論文
1981-12-05