title: Detection of multiple anions by thin-layer chromatography.
abstract: A novel detection method for 21 different anions by thin-layer chromatography is presented. Anions on the target plate form salts with amine in a developing solvent and are visualized after staining with citric acid-acetic anhydride reagent as white spots contrasting against a pale red-pink background. This method has particularly high sensitivity for anions of chlorate, sulfate, phosphate, chromate and dichromate (0.02-0.05 microg). The method is demonstrated to efficiently detect toxic arsenite in curry sauce as an example application. The proposed method offers highly efficient indirect detection for a wide range of anions, and serves as a purification procedure for the preparation of anionic sample solutions for other analytical methods.
authors.affiliation: Scientific Criminal Investigation Laboratory, Kanagawa Prefectural Police Headquarters, Yokohama, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Kato
authors.forename: Masataka
authors.initials: M
authors.lastname: Sakayanagi
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nakayama
authors.forename: Hideo
authors.initials: H
authors.lastname: Nishimura
authors.forename: Akira
authors.initials: A
authors.lastname: Ogamo
mesh_terms: D000838:Anions / Q000032:analysis*; D002855:Chromatography, Thin Layer / Q000379:methods*
chemical_list: D000838:Anions