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Displaying 1-5 of 10 results for Tag: Malate

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AB137: Determination of Inorganic and Organic Acids in Apple and Orange Juice Samples Using Capillary IC

Instrument Type: IC

Determinations of organic acids in fruit juices are used by the beverage industry for flavor characterization, identification of spoilage, identification of adulteration by a less costly juice, and product labeling. In this study, inorganic anions and organic acids in diluted filtered apple and orange juice samples were determined on a Dionex IonSwift MAX-100 anion-exchange column using electrolytically generated hydroxide gradient from 0.1–65 mM KOH over 25 min at 15 μL/min.

AB135: Determination of Anions and Organic Acids in Brewed Coffee Samples Using Capillary IC

Instrument Type: IC

The characteristic aroma, acidity, and flavor of a coffee are attributed to the inorganic anions, organic acids, chlorogenic acid, and monosaccharides content. In this study, inorganic anions and organic acid anions in caffeinated and decaffeinated brewed coffee samples are separated within 20 min by anion-exchange chromatography on a capillary Dionex IonSwift MAX-100 (0.25 × 250 mm) column set using a gradient of potassium hydroxide eluent at 12 μL/min.

AB105: Anions and Organic Acids in Wood Extracts

Instrument Type: IC

This application demonstrates the analysis of inorganic anions and anions of organic acids in waste liquor from wood extracts. The sample matrix and the contaminant were removed from the components of interest using an IonPac NG1 column as an additional guard column. This application requires an autosampler equipped with 10-port valve. With this configuration, IonPac NG1 column is placed in line with the analytical column, while a second column rinsed in counter flow direction with acetonitrile/water, followed by a conditioning step using sodium hydroxide.

AB104: Determination of 32 Low Molecular Mass Organic Acids in Biomass by Ion Chromatography Mass Spectrometry

Instrument Type: ICMS

Low Molecular Mass Organic Acids (LMMOAs) are degradation products during pretreatment processes for biofuel production that are known to inhibit microbial fermentation processes, thus reduce the conversion efficiency of biomass to biofuels. To understand and optimize the conversion process, an IC/MS method to quantitate LMMOA profiles during biofuel production was developed. The IC/MS method is useful in separating and profiling close eluters using the power of high performance anion exchange chromatography coupled with multiple SIM scans to identify over 30 compounds in a single run.

AN123: Determination of Inorganic Anions and Organic Acids in Fermentation Broths

Instrument Type: IC

Fermentation broths are complex mixtures of nutrients, waste products, cells and cell debris, and desired products. Fermentation monitoring is important for many industries because carbon sources and metabolic by-products can impact the yield of the desired products. This application note describes the use of two different anion-exchange columns, IonPac AS11 and IonPac AS11-HC, with suppressed conductivity detection, to analyze common organic and inorganic anions in yeast and bacterial fermentation broths.