酢酸ウラニルによる有機リンのセミミクロ容量定量

概要

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Organic phosphorus compound was decomposed in a microbomb with sodium peroxide, the product was taken up in distilled water, boiled gently for 30 min. with platinum foil for decomposition of hydrogen peroxide and the solution was neutralized with conc. nitric acid. The sample solution was titrated at 95°C with uranyl acetate solution previously standardized against an potassium dihydrogen phosphate. The titration was carried out in weak acetic acidity, and the end point was noted by the brown coloration with a drop of mother liquor on powdered potassium ferrocyanide. The sample required was 1020 mg, the time for a run of the analysis <I>ca</I>. 1 hour, and the error within ±0.3%. Since this is done in semi-micro scale, phosphorus in alkaline earth salts of organic phosphoric acid can be determined without any further treatment.
社団法人日本分析化学会の論文