A simple flow injection system with bead injection for trace iron determination

• Main Authors: Jitmanee K., Hartwell S.K., Jakmunee J., Jayasvasti S., Ruzicka J., Grudpan K.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-0037156532&partnerID=40&md5=d768c3ecedb1cb8f69274432fb772026; http://www.ncbi.nlm.nih.gov/pubmed/18968618; http://cmuir.cmu.ac.th/handle/6653943832/2565
• Institution: Chiang Mai University

A simple and low cost flow injection (FI) system with bead injection (BI) was developed for determination of low concentration (μmol 1-1) of iron in water samples. Chelex-100 chelating resin beads, trapped in a jet ring cell, were employed. The intensity of red complex of 1,10-phenanthroline with Fe2+ was monitored using colorimetric detector with a LED green light source. Amount of total Fe (Fe2+ and Fe3+) and Fe2+ can be evaluated by with and without reduction of Fe3+ using ascorbic acid. Lowest detectable levels of Fe2+ were 0.90 and 0.45 μmol 1-1 for sample loading time of 3 and 5 min, respectively. Working range was up to 3.90 μmol 1-1 using 0.3% w/v 1, 10-phenanthroline. Percent recoveries of spiked water samples (0.90-2.33 μmol 1-1 of Fe2+) were 100-110%. © 2002 Elsevier Science B.V. All rights reserved.