Szukana fraza: [Opis = "tytuł równoległy\: Methodical investigations on the usefulness of 2\-hydrazinothiazole derivatives to detect v\-amounts of Cu\+\+, Co\+\+, Fe\+\+, Fe\+\+\+ Ions by the method of paper partition chromatography. 2, Quantitative analysis of Cu\+\+ and Co\+\+ ions by planimetry of direct spot"]