Atropine Analyzed with a Gradient Method – AppNote – MicroSolv Technology Corporation

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ARTICLES, APPNOTES, FAQ (9289)
- AppNotes Library (1888)
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- Frequently Asked Questions?? (3402)
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May 3, 2012
dcatri

AppNotes Cogent Bidentate C18 / AppNotes Library / AppNotes Metabolites / AppNotes Pharmaceuticals / AppNotes Reversed Phase Methods / ARTICLES, APPNOTES, FAQ

No Ion Pair Reagent Necessary

Chromatographic separation and quantification methods of Atropa Alkaloids are often described in the literature and the method of choice is usually Ion-Pair Chromatography (IPC), which requires long equilibration times and it is not very robust.

This method shows a symmetrical peak for Atropine using a simple Gradient Method that does not include any Ion Pair Reagents which can cause damage to Columns and lack reproducibility. The retention times are extremely repeatable but one of the best advantages to this method is the time savings between runs.

Peak:
Atropine
Injection 1: RT = 4.772 minutes
Injection 2: RT = 4.773 minutes
Injection 3: RT = 4.772 minutes
Injection 4: RT = 4.774 minutes

Method Conditions
Column: Cogent Bidentate C18™, 4μm, 100Å
Catalog No.: 40018-7.5P
Dimensions: 4.6 x 75mm
Mobile Phase:
—A: DI Water + 0.1% Acetic Acid + 0.005% TFA
—B: Acetonitrile + 0.1% Acetic Acid + 0.005% TFA
—Both solutions were vacuum filtered through a 0.45µm Nylon Syringe Filter
Gradient:

Time (minutes)	%B
0	10
4	30
6	30
6.01	10

Flow rate: 1.0mL /minute
Detection: UV @ 214nm
Injection vol.: 1μL
Sample Preparation: Prepared in 50% Solution A / 50% Solution B, concentration 1mg / mL and was filtered through a 0.45µm Nylon Syringe Filter (MicroSolv Tech Corp.).

Note: After a simple sample clean up proce-dure, the Method can be applied for monitoring Atropine concentrations in biological specimens in cases of drug poisoning. The recoveries of Atropine added to drug-free specimens which were analyzed using the described method were satisfactory with coefficients of variation of 4% or less.

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