Improved Recovery of the Fungicide Carbendazim from Various Orange Juice Matrices by Employing QuEChERS Cleanup

  C18 HPLC column for High Speed and High Resolution Applications. Ascentis® Express C18 is the first choice for starting a new method. Ascentis Express HPLC columns, through the use of Fused-Core® particle technology, can provide you with both the high speed and high efficiencies of sub-2 μm particles at lower system pressure. With identical conditions, the Ascentis Express C18 column performs more than 4X faster than a standard C18 column, for most applications. The combination of high efficiency and lower operating pressure benefits UHPLC (or other ultra high pressure system) users, as well as conventional HPLC users. The increased efficiency of Ascentis Express columns enables you to use shorter columns and reduce solvent usage/cost. The Ascentis® Express C18 is also featured in an application note about liquid GC columns which can be found on the SelectScience website here, and a study on HPLC separation of bile acid here. Column details: Mode: Reversed Phase USP Code: L1 Particle Size: 2.7, <2.0 μm Pore Size: 90 Å Length: 20, 30, 50, 75, 100, 150 mm ID: 1.0, 2.1, 3.0, 4.6, 10 mm

Supel QuE Z-Sep sorbents enhance sample cleanup for complex matrices by effectively removing more fat and color from sample extracts than traditional phases for QuEChERS. By eliminating problematic matrix interferences, Z-Sep products provide more robust LC-MS and GC-MS methods. This proprietary technology can replace C18 and PSA phases in your current methods without additional method development.Supel QuE Z-Sep/C18, a combination of Discovery® DSC-18 and Z-Sep particles, is recommended for samples containing <15% fat. Supel QuE Z-Sep+, C18 and Z-Sep dual bonded to silica, is recommended for cleanup of samples containing >15% fat. Supel QuE Z-Sep is recommended for the anlysis of hydrophobic analytes in fatty matrices.Features & Benefits: Useful for pesticide residue analysis Proprietary technology, significantly diminishes interference from fatty matrices and pigments Employs “Quick Easy Cheap Effective Rugged Safe” QuEChERS methodology

Cyclodextrin-based DEX and Astec CHIRALDEX phases are stable, high boiling liquids and make effective CSPs for enantiomer separations by GC. The two lines exhibit complementary selectivity.Cyclodextrins are macromolecules composed of 6 or more D(+)-glucose residues bonded through α-glycosidic linkages. They are classified according to the number of glucose residues they contain: α-cyclodextrins (six residues), β-cyclodextrins (seven residues), and γ-cyclodextrins (eight residues). The three different sizes separate analytes over a wide range of molecular size. All hydroxyl groups, whether at the 2, 3 or 6 position, can be selectively modified with a derivative to impart unique physical properties and inclusion selectivities. Unlike LC, without derivatization no enantiomeric selectivity is exhibited in GC.Selectivity is a function of the derivative, the degree of derivatization, the position of the derivative on the cyclodextrin, whether the derivatized cyclodextrin is used neat or doped into a polysiloxane, and if doped, at what percentage. Certain CSPs are more selective for given molecular structures and often more than one will achieve a separation. CSPs may be chosen to optimize resolution, but also elution order or analysis time. It is conventional practice to screen multiple CSPs when developing a new method. To help our customers, we offer column screening kits and a column screening service for this purpose.