AN246: Determination of Diethylene Glycol in a Sorbitol Solution

Instrument Type: IC

Glycerin, sorbitol, and propylene glycol (PG) are widely used in pharmaceuticals and personal care products. These products are at risk from adulteration by similar, less costly, and very toxic compounds (ethylene glycol (EG) and diethylene glycol (DG)). The United States Pharmacopeia (USP) as directed by the US FDA revised USP 32 NF 26–27 monographs to identify and quantify EG and DEG in PG, sorbitol, and glycerin solutions. Here DEG in sorbitol solution is determined by IC-PAD with Pt working electrode. An ICS-6000 can be used for this application.

AN270: Determination of Hydroxymethylfurfural (HMF) in Honey and Biomass

Instrument Type: IC

This work describes a high-performance anion-exchange chromatography with pulsed amperometric detection (HPAE-PAD)-based method for the determination of HMF in samples ranging from food to treated biomass. A Dionex ICS-3000 system with a CarboPac PA1 column, electrolytically generated hydroxide eluent, and electrochemical detection with disposable Au-on-polytetrafluoroethylene working electrodes are used. The Dionex CarboPac PA1 is a high-capacity, rugged column suitable for determining mono- and disaccharides, and has high resolution for HMF in a wide variety of matrices.

AN280: Carbohydrate in Coffee: A New Fast HPAE-PAD Method

Instrument Type: IC

A fast method using the Dionex CarboPac SA10 column was tested for determining the common coffee carbohydrates. This column achieves fast, high resolution separation of mono- and disaccharides commonly found in food samples. The Dionex CarboPac SA10 column is composed of a wide-pore macroporous substrate coated with a strong anion-exchange latex of nano-beads. The combination of the high capacity provided by the substrate and the new internal chemistry of the nano-bead functionality delivers high resolution and short analysis time for the common sugars of interest in food and beverages.