Speciation of heavy metals in environmental water by ion chromatography coupled to ICP–MS

摘要: Biogenic (e.g. phytochelatins, porphyrins, DOM) as well anthropogenic NTA, EDTA, phosphonates) chelators affect the mobility and cycling of heavy metals in environmental waters. Since such can form strongly bound anionic metal complexes that are stable highly mobile, anion-exchange chromatography coupled to ICP–MS was investigated. A narrow bore HPLC system connected a micro concentric nebuliser for in-line sample introduction. new chromatographic procedure based on synthetic hydrophilic quaternary ammonium anion exchanger combination with nitrate strong eluent anion, gradient elution, provided high separation selectivity large analytical window. Low detection limits (nmol L–1) were achieved by on-column matrix removal preconcentration. This allowed method be successfully applied different research areas. In ecotoxicological studies effects algae low concentrations EDTA determined nutrient solutions without interference from (buffer) salt concentrations. groundwater, infiltrated polluted river, mobile species observed. river water pollution levels beside CuEDTA other Cu-complexes found nmol L–1