Determination of catecholamines in urine and plasma by on-line sample pretreatment using an internal surface boronic acid gel

Tomoyoshi Soga, Yoshinori Inoue

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

An automated method of analysis of catecholamines using a new packing material, internal surface boronic acid gel, was developed. The new support is designed with a carboxymethylcellulose-bonded external surface in order to be non-adsorptive to proteins and with a phenylboronic acid-bonded internal surface to retain only catecholamines. This packing support displayed an affinity for basic or neutral catecholic compounds with no protein adsorption and enabled on-line sample pretreatment of catecholamines in urine and deproteinized plasma. The catecholamines were selectively adsorbed on the new material and separated on a reversed-phase or a cation-exchange column. These compounds were then detected electrochemically. The limits of quantitation were 1.5-3.0 ng/ml in urine and 10-15 pg/ml in plasma, at a signal-to-noise ratio of 5.

Original languageEnglish
Pages (from-to)175-181
Number of pages7
JournalJournal of Chromatography B: Biomedical Sciences and Applications
Volume620
Issue number2
DOIs
Publication statusPublished - 1993 Oct 29
Externally publishedYes

Fingerprint

Boronic Acids
Catecholamines
Gels
Urine
Plasmas
Carboxymethylcellulose Sodium
Signal-To-Noise Ratio
Adsorption
Cations
Signal to noise ratio
Proteins

ASJC Scopus subject areas

  • Chemistry(all)
  • Clinical Biochemistry
  • Molecular Medicine

Cite this

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abstract = "An automated method of analysis of catecholamines using a new packing material, internal surface boronic acid gel, was developed. The new support is designed with a carboxymethylcellulose-bonded external surface in order to be non-adsorptive to proteins and with a phenylboronic acid-bonded internal surface to retain only catecholamines. This packing support displayed an affinity for basic or neutral catecholic compounds with no protein adsorption and enabled on-line sample pretreatment of catecholamines in urine and deproteinized plasma. The catecholamines were selectively adsorbed on the new material and separated on a reversed-phase or a cation-exchange column. These compounds were then detected electrochemically. The limits of quantitation were 1.5-3.0 ng/ml in urine and 10-15 pg/ml in plasma, at a signal-to-noise ratio of 5.",
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