Chemiluminescence flow system for the determination of Fe(II) and Fe(III) in water |
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| Authors: | W Qin Z J Zhang and F C Wang |
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| Institution: | (1) Department of Chemistry, Nanjing University, Nanjing 210008, China, CN;(2) Department of Chemistry, Shaanxi Normal University, Xi’an 710062, China, CN;(3) Department of Chemistry, Southwest Normal University, Chongqing 630715, China, CN |
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| Abstract: | A novel chemiluminescence (CL) flow system has been developed for the sequential determination of Fe(II) and Fe(III) in water.
Fe(II) was detected by its catalytic effect on the CL reaction between luminol immobilized on an anion exchange resin column
and dissolved oxygen; Fe(III) was determined by difference measurement after on-line conversion to Fe(II) in a reducing mini-column
packed with Cu plated Zn granules. For both ions, the calibration graph was linear in the range 1 × 10–9 to 1 × 10–6 g/mL, and the detection limit was 4 × 10–10 g/mL. A complete analysis could be performed in 1.5 min with a relative standard deviation of less than 5%. The system could
be reused for over 200 times and has been applied successfully to the determination of Fe(II) and Fe(III) in natural water
samples.
Received: 13 March 1997 / Revised: 3 June 1997 / Accepted: 6 June 1997 |
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