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35 New ACE NH2 (Amino) HPLC/UHPLC columns – ideal for sugar analyses


New ACE NH2 (Amino) columns from Advanced Chromatography Technologies are based on a proprietary bonding technology which provides high robustness and excellent column lifetimes. This high stability amino phase is ideal for the analysis of sugars and can be used in RP, NP, weak-anion exchange and HILIC modes. Available with ultra-inert, high efficiency 1.7, 3 and 5µm particles, ACE Amino is one of a wide range of carefully engineered ACE UHPLC/HPLC phases. These phases incorporate the latest developments in stationary phase technology in order to provide chromatographers with more choices for alternative selectivity but without compromising stability or robustness. Other phases include the ACE C18-AR which combines the hydrophobic characteristics of a C18 phase with the aromatic selectivity of a phenyl phase, the ACE C18-PFP which combines the hydrophobic characteristics of a C18 phase with the alternative selectivity offered by a pentafluorophenyl phase and the ACE C18-Amide and the ACE CN-ES (both phases offer alternative selectivity and are especially recommended for improved retention of polar compounds). Other products include the ACE SuperC18, a highly inert, highy pH stable C18 phase and ACE UltraCore, solid- core technology particle columns providing high efficiency separations but at reduced back pressures.


Advanced Chromatography Technologies Ltd, www.ace-hplc.com, info@ace-hplc.com. Tel: +44 (0) 1224 704 554.


Analysis of Diacetyl and other Vicinal Diketones (VDK’s) in Alcoholic Beverages


Vicinal diketones (VDK) are naturally produced compounds in the fermentation process. The monitoring of VDK levels is of great importance as the concentration of these compounds can greatly alter the flavour of a beverage. VDK’s produce a butter like flavour in the beverage so are undesirable in lighter beers that want a clean crisp taste, but are actually wanted at higher levels in wines to give a smoother taste and feel. The most commonly monitored VDKs are 2,3-butanedione also known a Diacetyl and 2,3-pentanedione also known as Acetyl Propionyl. VDK’s are typically found in the 0-100ppb range in beers, and can be anywhere from 100 to 5000ppb in wine.


The rise in popularity of craft beer has seen a dramatic rise in the number of smaller independent breweries. Many of which cannot justify they cost and space of large expensive GC systems. A method has been developed using the Ellutia 200 series Gas Chromatograph and the Ellutia EL-2100 Head-Space autosampler to provide an offering that can address the analysis at a lower entry price.


The System is able to analyse the compounds of interest down to the required low ppb levels.


The Ellutia 200 series GC and EL2100 autosampler can provide a simple lower cost solution to VDK analysis allowing breweries with smaller budgets the ability to perform this useful analysis.


For further information please visit: www.ellutia.com


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