Use of ion chromatography for the determination of transition metals in the control of sewage-treatment-plant and related waters

• Published in: Journal of Chromatography A Vol. 770; no. 1; pp. 185 - 193
• Main Authors: Cardellicchio, Nicola, Ragone, Pietro, Cavalli, Silvano, Riviello, John
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 16.05.1997; Elsevier
• Subjects: Analysis methods; Analytical chemistry; Applied sciences; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Metal cations; Natural water pollution; Other chromatographic methods; Pollution; Transition metals; Water analysis; Water treatment and pollution; Water analysis; Transition metals; Metal cations; Chemical analysis; Derivatization; Postcolumn; Sewage treatment plant; Waste water; Azo compound; Ion chromatography; Transition metal Ions; Water pollution; Spectrophotometry; River water; Quantitative analysis; Ultraviolet visible spectrometry
• ISSN: 0021-9673
• DOI: 10.1016/S0021-9673(97)00086-1

Transition metals [Fe(III), Fe(II), Cu, Ni, Zn, Co, Cd, Mn] were separated using a mixed-bed ion-exchange column (Dionex IonPac CS5A). A pyridine2–6-dicar☐ylic acid eluent was used and detection was accomplished using post-column reaction with 4-(2-pyridylazo)resorcinol and absorbance monitoring at 530 nm. Under the suggested chromatographic conditions both Mg 2+ and Ca 2+, up to 0.1 g/l and 0.3 g/l, respectively, do not interfere with separation quantitation. Detection limits from 0.06 μg/l for Co(II) to 0.38 μg/l for Fe(II). The calibration graphs were linear ( r 20.986) over two orders of magnitude (5–5000 μg/l). The selective separation of eight metals in 20 min was obtained and the method was applied to the analysis of natural and waste waters related to the maintenance of a sewage treatment plant.