Method for the Determination of Cu(II), Ni(II), Co(II), Fe(II), and Pd(II) at ppb/subppb Levels by Ion Chromatography
作者： Paolo Bruno , Maurizio Caselli , Barbara Elisabetta Daresta , Gianluigi de Gennaro , Valentina de Pinto
DOI: 10.1080/10826070601093762
关键词:
摘要: Abstract A method for the determination of Cu(II), Ni(II), Zn(II), Co(II), Fe(II), and Pd(II) at ppb/subppb levels by ion chromatography was developed, improving a previous work same authors. In order to lower detection limits, direct injection large sample volume (5 mL) 4‐(2‐pyridylazo) resorcinol solution pH 6, with hexadecylpyridinium chloride as post‐column reagent were used. The obtained calibration curves linear (for each metal R2≥0.99) good reproducibility; limits 1.1, 0.46, 39, 0.18, 4.5, 1.7 ppb, respectively.
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