1993
DOI: 10.1016/0039-9140(93)80076-4
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Application of photochemical inhibition in flow injection systems: Determination of epinephrine and L-dopa

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Cited by 19 publications
(6 citation statements)
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“…[4][5][6][7][8] A photokinetic method based on the strong inhibitory effect of the catecholamines on the photochemical reaction between Rose Bengal and EDTA has been proposed. 9 A fluorimetric method 10 based on the inhibition by catechlolamines of the photoreduction of phloxin (tetrachlorotetrabromofluorescein) by EDTA has also been proposed. A flow injection (FI) determination of epinephrine, norepinephrine, dopamine and l-dopa by their chemiluminogenic oxidation with potassium permanganate in acidic medium in the presence of formaldehyde has been reported.…”
mentioning
confidence: 99%
“…[4][5][6][7][8] A photokinetic method based on the strong inhibitory effect of the catecholamines on the photochemical reaction between Rose Bengal and EDTA has been proposed. 9 A fluorimetric method 10 based on the inhibition by catechlolamines of the photoreduction of phloxin (tetrachlorotetrabromofluorescein) by EDTA has also been proposed. A flow injection (FI) determination of epinephrine, norepinephrine, dopamine and l-dopa by their chemiluminogenic oxidation with potassium permanganate in acidic medium in the presence of formaldehyde has been reported.…”
mentioning
confidence: 99%
“…In this sense, kinetic-based determinations involve photogeneration of unstable reagents [78-82], or activation (or inhibition) of catalytic reactions [177][178][179][180], Table 7. determined in pharmaceutical formulations [10].…”
Section: Kinetic-based Applicationsmentioning
confidence: 99%
“…The LDs were estimated at 0.22 mg L -1 for both analytes. The inhibitory effect of the analyte was exploited for the determination of nitroprusside[178], epinephrine and L-dopa[179] that decreased the rate of the photochemical reaction of tetrachlorotetrabromofluorescein (phloxine) and EDTA. Low selectivity is the main limitation, but these analytes were determined in pharmaceutical preparations in which other catecholamines are absent.Generation of oxidants such as H 2 O 2 , H 2 S 2 O 5 , and O 3 derived from free radicals formed during sample irradiation has been successfully exploited to yield CL.…”
mentioning
confidence: 99%
“…The need for rapid and simple methods capable of determining trace amounts of the peroxide is increasing in environmental, clinical and food analyses. A number of manual and flow-injection (FI) methods have been reported for the determination of hydrogen peroxide by using enzymatic and nonenzymatic reactions combined with photometric, [3][4][5][6][7] fluorometric, [8][9][10][11][12] chemiluminescent [13][14][15][16][17] and electrochemical 18,19 detections. Especially, FI procedures including immobilized enzyme reactors, which lead to the generation of hydrogen peroxide, have provided attractive methods for specific determinations of clinically interesting substances, such as glucose, cholesterol and glutamic acid.…”
Section: Introductionmentioning
confidence: 99%