Product_description: ['YMC-Pack C4 (butyl) columns are less hydrophobic than C8 or C18 packings, and generally utilize more aqueous eluents than either of these reversed-phase column types -Fully endcapped -Ideally suited for biological separations -High-coverage monomeric bonding on perfectly spherical silica supports -Available in 120 , 200and 300pore size packings When compared to C8 and C18 columns (using the same eluents), C4 stationary phases show significantly shorter retention for non-polar compounds. Retention of polar compounds, however, is not significantly affected. Therefore, mixtures with a wide range of component polarity are best analyzed by YMC-Pack C4. This is due to the C4 bonded phase exhibiting shorter analysis time while still maintaining high resolution when compared to longer-chain bonded chemistries.']

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