Solid phase extraction and preconcentration of some metal ions using Schiff base immobilised silica gel followed by ICP-OES

• Published in: International journal of environmental analytical chemistry Vol. 99; no. 15; pp. 1528 - 1539
• Main Authors: Tokay, Feyzullah, Bağdat, Sema
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 08.12.2019; Taylor & Francis LLC
• Subjects: Analytical chemistry; Analytical methods; Cadmium; Copper; Detection; Drinking water; Flow velocity; Gels; Heavy metals; ICP-OES; Imines; Inductively coupled plasma; Lakes; Manganese; Metal ions; Nickel; Reference materials; Schiff base; Silica; Silica gel; Silicon dioxide; simultaneous preconcentration; solid phase extraction; Solid phases; Spectrometry; Water analysis; Water sampling
• ISSN: 0306-7319; 1029-0397
• DOI: 10.1080/03067319.2019.1625341

In this study, a simple and efficient solid phase extraction procedure was developed for simultaneous separation and preconcentration of Ba, Cd, Co, Cu, Mn and Ni. The methodology was based on preconcentration of the target analytes on N,N'-bis(4-methoxysalicylidene)-1,3-propanediamine modified silica gel prior to inductively coupled plasma optic emission spectrometry detection. The experimental conditions were as follows: pH of sample 5.00; sample and eluent flow rates 3 mL min −1 ; sample volume 25 mL; eluent 0.5 mol L −1 HNO 3 ; eluent volume 3.0 mL. Preconcentration factor was achieved as 33.3 for Ba, Co, Mn; 83.3 for Cd, Ni; 166.7 for Cu. Limits of detection were found as 0.33, 0.26, 0.27, 0.36, 0.27 and 0.19 µg L −1 for Ba, Cd, Co, Cu, Mn and Ni, respectively. The relative standard deviations of 2.6-3.8% were obtained via nine parallel analyses. The suggested procedure was successfully validated by the analysis of TMDA-53.3 Lake Ontario water and ERM-CA022a soft drinking water certified reference materials and applied to various natural water samples.