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.

Analysis of alkaloids in bitter orange extract by HPLC-UV

Instrument Type: HPLC

The Thermo Scientific HPLC system is applied for the analysis of alkaloids in bitter orange extract which is an ingredient in traditional Chinese medicines. The separation is performed on a Thermo Scientific Acclaim 120 C18 column, with UV detection at 224 nm and is suitable for assaying ingredients and formulations for bitter orange and its active constituents. Chromatogram A is standards and chromatogram B is an extract of bitter orange.

AN143: Determination of Organic Acids in Fruit Juices

Instrument Type: IC

This application note shows how organic acids can be determined in fruit juices at low to high mg/L concentrations using a simple dilution, an IonPac AS11-HC, electrolytically generated eluent gradients, and suppressed conductivity detection. The fruit juices analyzed in this application note are orange, grape, apple, and cranberry.

Improved analysis of orange soft drink additives using a Hypersil GOLD HPLC column

Instrument Type: HPLC

The Thermo Scientific HPLC system is applied for the analysis of orange soft drink additives. The separation is performed on a Thermo Scientific Hypersil GOLD HPLC column in less than 8 minutes, with UV detection at 254 nm. Orange juice is a complex matrix and as limited sample preparation has been performed in this analysis some matrix peaks are being detected.