{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,20]],"date-time":"2026-04-20T16:21:33Z","timestamp":1776702093883,"version":"3.51.2"},"reference-count":18,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2005,1,14]],"date-time":"2005-01-14T00:00:00Z","timestamp":1105660800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biomedical Chromatography"],"published-print":{"date-parts":[[2005,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>An ion chromatographic method with conductivity detection for the simultaneous determination of ephedrine, pseudoephedrine and norephedrine was developed. A mixture of 2.0 mmol\/L HNO<jats:sub>3<\/jats:sub> and 2% (v\/v) acetonitrile was used as eluent. The three ephedrine\u2010like compounds were separated and determined within 20 min. The linear ranges were 0.08\u201350 \u00b5g\/mL for ephedrine, 0.08\u201340 \u00b5g\/mL for pseudoephedrine and 0.06\u201340 \u00b5g\/mL for norephedrine. The detection limits were 0.03 \u00b5g\/mL for ephedrine and pseudoephedrine, and 0.02 \u00b5g\/mL for norephedrine. The method has been applied successfully to the determination of these sympathomimetics in pharmaceutical preparations and in Ephedra herbs. 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