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Displaying 1-5 of 6 results for Tag: IonPac CS17

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AU155: Determination of Cations and Amines in Hydrogen Peroxide by Ion Chromatography Using a RFIC (Reagent-Free) System

Instrument Type: IC

Hydrogen peroxide is an essential chemical in the fabrication of integrated circuit and microcircuit devices. Maximum allowable contaminate levels for semiconductor grade hydrogen peroxide can be as low as <100 ppt (ng/L) per individual inorganic cation. This application uses an IonPac CS17 column to determine trace cations and amines in hydrogen peroxide with a large-loop injection. The CS17 column separates amines without the organic solvent eluent modifier needed for separating amines when using older cation-exchange ion-chromatography (IC) columns.

AU160: Determination of N,N-Dimethyl-o-Toluidine andN,N-Diethyl-p-Toluidine in Ethylene Gas Samples

Instrument Type: IC

Amines are found throughout nature and are synthesized for many commercial applications. They are used as pharmaceuticals, anti-corrosive agents, and chemical intermediates, and can indicate food spoilage. IC is an excellent technique for determining amines in a variety of samples, even low concentrations. Here is shown the separationand detection of two such amines: N,N-dimethyl-otoluidine and N,N-diethyl-p-toluidine. These amines are separated on a CS17 column with an MSA gradient and 9% acetonitrile, and are detected by absorbance at 210 nm.

AN199: Determination of N-Methylpyrrolidine in Cefepime Using a Reagent-Free Ion Chromatography System

Instrument Type: IC

This application note describes a cation-exchange chromatography method that significantly reduces the time between injections relative to the current USP method (by approximately 3 h) due to the very low hydrophobic character of the IonPac® CS17 column, enabling a faster elution of strongly retained compounds (e.g., cefepime). The linearity, detection limits, precision, and recovery of NMP in cefepime hydrochloride are determined. The limit of quantitation for this method is approximately 0.001% NMP, well within the limit of 0.3% set in the USP method.

AN194: Determination of Carbachol In Ophthalmic Solutions Using a Reagent-Free Ion Chromatography System

Instrument Type: IC

A simple RFIC method is described for determination of carbachol, bethanechol, and choline in 25 min with a Dionex IonPac CS17 column. Methanesulfonic acid (MSA) eluent is delivered isocratically by an Eluent Generator (EG). Use of an EG eliminates eluent preparation errors and helps ensure retention time reproducibility. The sensitivity of suppressed conductivity detection allows carbachol determination in ophthalmic solutions with only a simple sample dilution.


Instrument Type: IC