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</center><p>polarity. Classification of stationary phases for GC columns. Most packed  This fundamental equation helps you choose the best column stationary phase; length; inner diameter (ID); and film thickness for your specific applications. Greater sample capacity compared to capillary columns Try to match polarity – oil and water don’t mix! The column is filled with a particulate solid support, with particle diameters ranging from–μm to – μm. Packed columns contain a finely divided, inert, solid support material (commonly based on diatomaceous earth) coated with liquid stationary phase. Once you  We have designed six different PEG capillary GC column phases — Stabilwax®, Stabilwax ® -DA, Stabilwax ® -DB, FAMEWAX ™, Rtx-Wax, and MXT-Wax columns — each an  interactions that cause a stationary phase to be more or less retentive to one analyte than anotherPacked columns are constructed from glass, stainless steel, copper, or aluminum, and typically are 2–6 m in length with internal diameters of 2–4 mm. is determined by the type and amount of functional groups in the stationary phase. Columns. If the stationary phase and analyte polarities are similar, then the attractive forces are strong, and more retention will result When choosing a column, consider the polarity of both the stationary phase and your target analytes. Packed columns contain a finely divided, inert, solid support material (commonly based on diatomaceous earth) coated with liquid stationary phase. Look for unique characteristics of compounds and match them to a phase. resolution – consider a smaller ID. If you need better peak shape for difficult compounds, try the ‘UI’ version Stationary phase. Today’s applications demand high sensitivity, reproducibility, and reliability for active compounds. Agilent J&W Ultra Inert  Columns. Instrumentation. If you have the correct selectivity, change the dimensions to improve. Figure shows a typical example of a packed column Instrumentation. Most packed columns are –m in length and have an internal diameter of–mm.</p></translate>
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