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Displaying 1-5 of 83 results for: columns

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TN001521: Choosing the Appropriate Cation-Exchange Column for Quaternary Amine Determinations

Instrument Type: IC

The goal of this work is to evaluate and identify cation-exchange columns suitable for applications involving quaternary amine compound (QAC) determinations. Four Thermo Scientific Dionex IonPac columns (CS17, CS19-4µm, CS20, and CS21-4µm) were evaluated. A Thermo Scientific™ Dionex™ ICS-5000+ HPIC™ system that produced an electrolytically generated methane sulfonic acid (MSA) eluent was used for this work. The results for retention time, peak area, peak asymmetry, and efficiency are included here along with recommendations for choosing a column for QAC determinations.

AB001056: Citric Acid Determination in Mixed Beer Beverages

Instrument Type: IC

This record presents a fast isocratic method to determine citric acid in carbonated beverages with a carbonate-based eluent and electrolytically regenerated suppression. This application can be run on any Thermo Scientific™ Dionex™ IC system equipped with suppressed conductivity detection. The carbonate eluent (see Method) can be generated electrolytically using Thermo Scientific™ Dionex™ RFIC™ technology.

Rapid analysis of nine antioxidants in cooking oil (采用UHPLC法快速分析食用油中的九种抗氧化剂)

Instrument Type: UHPLC

In this paper, by using small size packing column, A UHPLC method was established for the simultaneous determination of propyl gallate (PG), 2,4, 5-trihydroxybutanone (THBP), tert-butylhydroquinone (TBHQ), demethyldihydroguaiacic acid (NDGA), tert-butylp-hydroxyanisole (BHA), 2, 6-ditert-butyl-4-hydroxymethyl phenol (IONox-10) in edible oil 0), octyl gallate (OG), 2, 6-di-tert-butylp-methyl phenol (BHT), dodecyl gallate (DG)9 antioxidant solutions. The method has a short analysis time, and can complete the separation of nine antioxidants in 11 minutes.

Vanquish Neo UHPLC system sets new performance standards for single-shot nanoLCMS bottom-up proteomics

Instrument Type: nanoLCMS

Demonstrate the superior performance of the Thermo Scientific™ Vanquish™ Neo, next-generation low-flow UHPLC system, for nanoLCMS bottom-up proteome profiling when coupled to a Thermo Scientific™ Orbitrap Exploris™ 480 mass spectrometer using the 75 μm I.D. × 75 cm Thermo Scientific™ EASY-Spray™ PepMap Nep column. Demonstrate system versatility and potential for new levels of proteomic depth coverage through the coupling of two 75 cm long nano columns.

Increase sensitivity in UHPLC-MS analysis by minimizing post-column dispersion

Instrument Type: LCMS

Reduce post-column dispersion with small ID capillaries for fast gradient UHPLC-MS methods using sub-2 μm particle next-generation columns