Ultrasound-enhanced flow injection chemiluminescence for determination of hydrogen peroxide
Greenway, Gillian M.; Leelasattarathkul, Tapparath; Liawruangrath, Saisunee; Wheatley, R. Alan; Youngvises, Napaporn; Greenway Gillian M.; Department of Chemistry, University of Hull; Leelasattarathkul Tapparath; Department of Chemistry, Faculty of Science, Chiang Mai University; Liawruangrath Saisunee; Department of Chemistry, Faculty of Science, Chiang Mai University; Wheatley R. Alan; Department of Chemistry, University of Hull; Youngvises Napaporn; Department of Chemistry, Faculty of Science and Technology, Thammasat University
Журнал:
Analyst
Дата:
2006
Аннотация:
A novel ultrasonic flow injection chemiluminescence (FI-CL) manifold for determining hydrogen peroxide (H2O2) has been designed and evaluated. Chemiluminescence obtained from the luminolâ H2O2â cobalt(ii) reaction was enhanced by applying 120 W of ultrasound for a period of 4 s to the reaction coil in the FI-CL system and this enhancement was verified by comparison with an identical manifold without ultrasound. The system was developed for determining ultra-trace levels of H2O2 and a calibration curve was obtained with a linear portion over the range of 10â 200 nmol L<sup>â 1</sup> H2O2 (correlation coefficient 0.9945). The detection limit (3Ï ) and the quantification limit (LOQ) were found to be 1 Ã 10<sup>â 9</sup> and 3.3 Ã 10<sup>â 9</sup> mol L<sup>â 1</sup> respectively and the relative standard deviation was 1.37% for 2 Ã 10<sup>â 7</sup> mol L<sup>â 1</sup> H2O2 (n = 10). The method was applied to the determination of trace amounts of H2O2 in purified water and natural water samples without any special pre-treatments.
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