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Determination of hydrogen peroxide in sea water by flow-injection analysis with chemiluminescence detection

โœ Scribed by David Price; Paul J. Worsfold; R. Fauzi; C. Mantoura

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
747 KB
Volume
298
Category
Article
ISSN
0003-2670

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โœฆ Synopsis

Hydrogen peroxide ( H202) plays a key role in many marine chemical processes, e.g., redox reactions involving transition metals and organic compounds. A rapid, flow-injection procedure with chemiluminescence detection for the determination of H,Oz in sea water is reported. It is based on the H20z induced oxidation of an alkaline solution of luminol in the presence of a catalyst (cobalt( II)). The sample throughput was 120 h-' with small sample volumes (100 4) and low detection limits (10 nM in Mill&Q water; 5 nM in sea water, S/N = 3). The working linear range, which is suitable for the determination of ambient levels of H,O, in sea water was 5-500 nM. A portable, automated version of the monitor has been successfully deployed onboard ship in the western Mediterranean and a typical depth profile for H202 is presented.

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