Premium
Determination of Arsenic in Flue‐Cured Tobacco and in Soils
Author(s) -
Small H. G.,
McCants C. B.
Publication year - 1961
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1961.03615995002500050012x
Subject(s) - arsenic , chemistry , sulfuric acid , digestion (alchemy) , soil water , environmental chemistry , perchloric acid , distillation , curing of tobacco , chromatography , inorganic chemistry , environmental science , organic chemistry , botany , biology , soil science
Procedures are described for the semimicro analysis for arsenic in flue‐cured tobacco and in soils. The plant material is digested with a mixture of nitric, sulfuric and perchloric acids and the soil with sulfuric and perchloric acids. Arsenic is distilled directly from the digestion flask, absorbed in an iodine solution and determined colorimetrically by the molybdenum‐blue method. The data show that good recovery of arsenic and reproducibility of results were obtained with the described procedures. The acid digestion method for plant material gave results which were comparable to those obtained by oxidation in an oxygen bomb. The evidence from soils indicates that the digestion and distillation procedure employed removed essentially all of the arsenic.