Determination of UV-absorbing anions in environmental samples by microcolumn high-performance liquid chromatography

摘要

The chromatographic retention and separation of NO_2~-, Br~-, NO_3~-, and I~- anions on a column packed with Nucleosil 100-5 C18 dynamically modified with trimethyloctadecylammonium bromide (TMODAB) was studied using direct UV detection. A procedure was developed for the determination of the above anions in the concentration range 0.06-2500 #mu#g/l without preconcentration. Sample preparation involved only the elimination of organic impurities (if present) from the test sample. The procedure was used for the determination of NO~(2-) and NO~(3-) anions in Baikal Lake water and in an aerosol extract.