Photo-Induced Chemiluminometric Determination of Acrolein in a Multicommutation Flow Assembly

摘要

This paper deals with the determination of acrolein based on a strategy provided with a sensitive detection,the chemiluminescence;a"clean chemical"analyte treatment,the on-line UV-irradiation;and,a simple and quick automated system,the emergent multicommutation continuous-flow methodology.The pesticide solution is irradiated(stopped-flow)for 30 s;then,the resulting solution is introduced to the flow-cell after being alternated with segments of the stream formed by potassium permanganate in strong acid solution and ethanol segments.The calibration range,from 1 to 1mg l~(-1),resulted in a linear behavior over the range 5-100 mu g l~(-1)and fitting the linear equation:I = 75.69 x 17.75;correlation coefficient 0.9997.The limit of detection was 0.1 mu g l~(-1)and the sample throughput 52 h~(-1).After testing the influence of a large series of potential interferents the method was applied to different types of samples.