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Displaying 1-5 of 85 results for: columns

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AU002026: Determination of Tetrafluoroborate, Perchlorate, and Hexafluorophosphate in an Electrolyte Sample for Lithium-Ion Battery Production

Instrument Type: IC

This application demonstrated an improved method for the determination of tetrafluoroborate, perchlorate, and hexafluorophosphate in simulated lithium-ion battery production samples using a RFIC system with suppressed conductivity detection, and 2 mm versions of Dionex IonPac AS20 columns. This method significantly reduces eluent consumption and thus prolongs the life of the EGC as flow rate is reduced from 1.2 to 0.3 mL/min. The method has a linear calibration over the concentration range of 1 to 40 mg/L and was shown to be precise and accurate.

CN001941: Determination of Chlorate in Agar Samples using Ion Chromatography (IC)

Instrument Type: IC

The European Food Safety Authority (EFSA) reported chlorate as a risk to human health. In June 2020, the European Commission set chlorate limits for various foods, including the limit for algae (0.05 mg/kg). This work describes a straightforward method to determine chlorate in seaweed-derived agar products. A sample preparation circumvents unwanted gelation, thus avoiding clogging capillaries and columns. Our approach is suitable for analyzing chlorate where the final agar content does not exceed 0.5–1.0%

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.