A simple HPLC method with pulsed EC detection for the analysis of creatine

Yoonsun Mo, David Dobberpuhl, Alekha K. Dash

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The objective of this study was to develop a simple and sensitive LC method for the determination of creatine in aqueous solutions as well as in rat plasma using electrochemical detection. The chromatographic system consisted of a GP50 gradient pump, an ED40 pulsed electrochemical detector, and an AI-450 chromatography automation system (Dionex). The mobile phase consisted of a mixture of water, acetonitrile, 0.01 M sodium acetate, and 1.0 M sodium hydroxide (2.5:2.5:90:5, V/V/V/V) at a flow rate of 1.0 ml/min. The chromatographic separation was achieved at 45°C on a column with a polyhydroxylated glucose and sulfonated stationary phase. The retention times of creatine and creatinine was 3.50 and 4.73 min, respectively, with creatine fully resolved from its major degradation product, creatinine. The standard curves were linear over the concentration range of 0-20 μg/ml. Within-day and day-to-day relative standard deviations (R.S.D.) were less than 10%. This method was used to study dissolution characteristics of various creatine salts in water.

Original languageEnglish (US)
Pages (from-to)125-132
Number of pages8
JournalJournal of Pharmaceutical and Biomedical Analysis
Volume32
Issue number1
DOIs
StatePublished - Apr 24 2003

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Pharmaceutical Science
  • Drug Discovery
  • Spectroscopy
  • Clinical Biochemistry

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