LCGC North America Application Note Alert Having trouble viewing this email? Click here Sample Prep GPC Cleanup of Olive Oil Samples The use of an AZURA® GPC cleanup system to automate sample cleaning based on gel permeation chromatography (GPC) according to US EPA SW-846 method 3640A is described.   LC/HPLC Systematic HPLC Method Development and Robustness Evaluation of 13 Carbonyl DNPH Derivatives Using DryLab® The determination of DNPH derivatized carbonyls from air samples according to DIN ISO 16000-3 method can be improved to separate all 13 compounds. Sensitive Online SPE Determination of Bisphenol A in Water Samples The sensitive determination of bisphenol A (BPA) from water samples is presented. An AZURA® Analytical HPLC system with online-coupled SPE prior to analysis was used. Determination of Sugars and Natural Sugar Substitutes in Different Matrices Identify the most commonly used sugars and natural sugar substitutes in one run. Even solid samples such as chewing gum or tooth paste don’t require much effort. Semi Preparative Xylitol Purification with a Dedicated Sugar Purification System Purification of xylose from a microbial xylose conversion fermentation mash with an AZURA® system using a polymer-based column and refractive index detection.