Detection of multiple anions by thin-layer chromatography.
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.
Kato
Noriyuki
N
Scientific Criminal Investigation Laboratory, Kanagawa Prefectural Police Headquarters, Yokohama, Japan.
Sakayanagi
Masataka
M
Nakayama
Takahiro
T
Nishimura
Hideo
H
Ogamo
Akira
A
D000838:Anions / Q000032:analysis*; D002855:Chromatography, Thin Layer / Q000379:methods*
D000838:Anions