April 2012
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Environmental
Fast Determination of Inorganic Anions in Municipal Drinking Water Using Capillary Ion Chromatography
Fei Pang, Terri Christison, Richard Jack, and Linda Lopez, Thermo Fisher Scientific
Capillary-scale high-pressure ion chromatography (HPIC™) systems can be operated continuously at up to 5000 psi, allowing separations at higher flow rates. The Thermo Scientific Dionex IonSwift MAX-100 monolith column is a high-capacity, high-efficiency column designed for fast separation of organic acids and inorganic anions, and is ideal for rapid analysis of anions in municipal water.
 
Fast Determination of Inorganic Anions Using the Thermo Scientific Dionex IonPac AS18-Fast and AS18-4 µm Capillary Columns
Fei Pang, Terri Christison, Barbara Shao, and Cathy Tanner, Thermo Fisher Scientific
The Thermo Scientific Dionex IonPac AS18-4 µm column has sufficient capacity to maintain resolution at increased flow rates even in the 150 mm column format. Oxyhalides in municipal drinking water can be separated in less than 4 min and seven common inorganic anions can be resolved in under 3 min.
 
Determination of Inorganic Anions Using the Dionex IonSwift MAX-200 Monolith Column with Capillary Ion Chromatography
Fei Pang, Terri Christison, Barbara Shao, and Cathy Tanner, Thermo Fisher Scientific
Monolith columns contain a network of large separation pores, providing improved mass transfer at high-flow velocity for high-speed separations with minimal loss of resolution. The IonSwift™ MAX-200 capillary column is ideal for fast analysis of inorganic anions and oxyhalides in wastewater and drinking water.
 
Hexavalent Chromium Determination by Two-Dimensional Capillary Ion Chromatography Using a Monolith Concentrator Column
John Madden, Kannan Srinivasan, Chris Pohl, and Navette Shirakawa, Thermo Fisher Scientific
A two-dimensional (2D) method for hexavalent chromium determination in drinking water samples using suppressed conductivity detection. Combining standard-bore and capillary columns with a monolith concentrator column yields minimum detection limits (MDLs) better than existing methods.
Beverage Testing
Determination of Inorganic and Organic Acids in Apple and Orange Juice Samples Using Capillary IC
Terri Christison, Fei Pang, and Khalil Divan, Thermo Fisher Scientific
Organic acid profiles can be used to identify juice products and identify adulteration by other juices. Inorganic anions and organic acids in diluted filtered apple and orange juice samples can be quickly resolved on a Dionex IonSwift MAX-100 anion-exchange column with high-efficiency.
 
Determination of Anions and Organic Acids in Brewed Coffee Samples Using Capillary IC
Terri Christison, Fei Pang, and Khalil Divan, Thermo Fisher Scientific
Inorganic anions and organic acid anions in caffeinated and decaffeinated brewed coffee samples are separated within 20 min using a capillary Dionex IonSwift MAX-100 anion-exchange column. The higher flow rate advantages of the monolith combined with the Dionex IonPac™ AS11 chemistry optimized for organic acid separations is ideal for monitoring coffee maturation, ensuring coffee bean quality, and determining the extent of adulteration in purchased beans.
Pharmaceuticals
Fast Determination of Inorganic Counterions in a Pharmaceutical Drug Using High-Pressure Capillary Ion Chromatography
Fei Pang, Terri Christison, and Linda Lopez, Thermo Fisher Scientific
The counteranion chloride can be determined in a drug for type 2 diabetes treatment in less than 8 min at a 24 µL/min flow rate using a Dionex IonSwift MAX-100 capillary column and a high-pressure IC (HPIC) system.
 
Implementation of a Walk-Up High-Pressure Capillary Ion Chromatograph for the Fast Separation of Pharmaceutically Relevant Inorganic Anions and Cations
Terri Christison, John E. Madden, Fei Pang, and Khalil Divan, Thermo Fisher Scientific
Determination of inorganic anions and cations in two different drugs using a capillary high-pressure IC (HPIC) system is described. High-efficiency monolith and small-particle columns can be operated at higher flow rates and pressures to increase separation speed without compromising resolution.
 
Capillary Ion Chromatography Mass Spectrometry: Recent Advances in Instrumentation and Applications
Leo Jinyuan Wang and William Schnute, Thermo Fisher Scientific
The introduction of innovative capillary IC further improves the usability of IC-MS for trace-level analysis and sample-size limited research such as in metabolism/metabolomics. Using capillary IC with an RFIC system in conjunction with the optimized ESI source, this study demonstrates successful applications for simultaneous determination of active pharmaceutical ingredients (API) and impurities, metabolite profiling of organic acids, and phosphate compounds in the energy cycle, as well as the profiling of nucleotides in biological samples.

Contact Editor - Meg Evans

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