File(s) under permanent embargo
Determination of 5-hydroxytryptamine (serotonin) and related indoles by flow injection analysis with acidic potassium permanganate chemiluminescence detection
journal contribution
posted on 1998-05-04, 00:00 authored by Neil BarnettNeil Barnett, B J Hindson, S W LewisA simple, rapid and sensitive method for the determination of 5- hydroxytryptamine (serotonin), 5-hydroxytryptophan or 5-hydroxyindole-3- acetic acid, using flow injection analysis with acidic potassium permanganate chemiluminescence detection, is described. The log-log plots for 5- hydroxytryptamine, 5-hydroxytryptophan and 5-hydroxyindole-3-acetic acid gave equations of best fit, of y=-0.03χ2+0.51χ+6.15 (r2=0.9990), y=- 0.05χ2+0.35χ+5.70 (r2=0.9995) and y=-0.04χ2+0.49χ+5.60 (r2=0.9999) respectively, where y is log (chemiluminescence emission response (mV)) and χ is log (concentration (M)). The log-log calibration functions for the three analytes approximated linearity in the concentration range from I x 10-8 to 1 x 10-6 M, where the slopes of the log-log plots were within the range from 1.01 to 1.04. The precision (measured as relative standard deviation) for 5-hydroxytryptamine was 2.3% (n=6 at 1 x 10-7 M). The detection limits (signal-to-noise ratio=3) were 2 x 10-9M, 3 x 10-9M and 1.5 x 10-8 M for 5-hydroxytryptamine, 5-hydroxytryptophan and 5- hydroxyindole-3-acetic acid, respectively. Preliminary experiments using an extended range photomultiplier tube realised enhanced detection limits due to the wavelength of maximum emission being centered around 670 nm rather than 610 nm as previously thought.
History
Journal
Analytica chimica actaVolume
362Issue
2-3Pagination
131 - 139Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
ISSN
0003-2670Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
1998, Elvsevier B.V.Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC