Biomaterial Database

Determination of free urinary catecholamines by high-performance liquid chromatography with electrochemical detection. 1994

P Volin

United Laboratories Ltd., Helsinki, Finland.

The present paper compares a manual high-performance liquid chromatographic (HPLC) method with electrochemical detection (ED) with an on-line HPLC-ED method for the determination of free catecholamines (CAs) (norepinephrine, epinephrine, and dopamine) in urine. The manual method involves a two-stage extraction procedure with home-packed columns filled with weakly acidic cation-exchange resin followed by adsorption onto alumina while the on-line method uses a strong cation-exchange polymer as precolumn material which allows the simultaneous determination of free CAs and metanephrines (MNs) in urine. Reference control urine samples analysed with both methods gave levels of CAs within the acceptable reference ranges. Dihydroxybenzylamine was used as an internal standard in both methods and the separation was performed by ion-pairing reversed-phase HPLC.

UI	MeSH Term	Description	Entries
D007202	Indicators and Reagents	Substances used for the detection, identification, analysis, etc. of chemical, biological, or pathologic processes or conditions. Indicators are substances that change in physical appearance, e.g., color, at or approaching the endpoint of a chemical titration, e.g., on the passage between acidity and alkalinity. Reagents are substances used for the detection or determination of another substance by chemical or microscopical means, especially analysis. Types of reagents are precipitants, solvents, oxidizers, reducers, fluxes, and colorimetric reagents. (From Grant & Hackh's Chemical Dictionary, 5th ed, p301, p499)	Indicator,Reagent,Reagents,Indicators,Reagents and Indicators
D007223	Infant	A child between 1 and 23 months of age.	Infants
D008676	Metanephrine	Product of epinephrine O-methylation. It is a commonly occurring, pharmacologically and physiologically inactive metabolite of epinephrine.	Metadrenaline
D002395	Catecholamines	A general class of ortho-dihydroxyphenylalkylamines derived from TYROSINE.	Catecholamine,Sympathin,Sympathins
D002411	Cation Exchange Resins	High molecular weight insoluble polymers which contain functional anionic groups that are capable of undergoing exchange reactions with cations.	Cation Exchange Resin,Cation Exchangers (Resins),Exchange Resin, Cation,Exchange Resins, Cation,Resin, Cation Exchange,Resins, Cation Exchange
D002648	Child	A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL.	Children
D002675	Child, Preschool	A child between the ages of 2 and 5.	Children, Preschool,Preschool Child,Preschool Children
D002851	Chromatography, High Pressure Liquid	Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed.	Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004563	Electrochemistry	The study of chemical changes resulting from electrical action and electrical activity resulting from chemical changes.	Electrochemistries
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man