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New HPLC Columns Provide a Reliable Cornerstone for Your LC Lab


Solid, reliable Roc HPLC columns from Restek are pressure rated for any 400 bar HPLC system and deliver the peak shape, reproducibility, ruggedness, and


performance you demand for all of your conventional HPLC applications. An exceptional value for routine analyses and large-


volume workflows, Roc columns are made from high-purity silica backed by quality manufacturing and are available in a variety of phases. And newly designed minimal packaging offers compact storage with serial #-specific certificates of analysis available for download at www.restek.com/documentation


These rugged new columns are built to give you dependable data for a wide range of everyday methods. Roc HPLC columns are available with C18, C8, Phenyl-Hexyl, Cyano, and bare silica phases on either 3 or 5 µm fully porous spherical particles. Choose 3.0 or 4.6 mm ID in 100, 150, or 250 mm lengths for coverage of 98% of USP methods.


Get more of what you want, and less of what you don’t, with Roc LC columns from Restek.


Order today at www.restek.com/roc


HPLC Columns – Packed by the Sorbent Manufacturer


Macherey-Nagel, manufacturer of chromatography sorbents, developed the HPLC sorbent NUCLEOSIL®


more than 40


years ago. It was one of the first spherical type A silicas and is still manufactured by Macherey-Nagel. It comes in numerous modifications, particle and pore sizes.


Manufacturer-packed HPLC columns are available with nonpolar RP phases (e.g., C18, C18 HD, C8, C6H5) and polar phases (e.g., CN, NH2, SA, SB, SiOH). They are often applied in validated methods.


For nearly 15 years, they have supplemented their successful NUCLEOSIL® range with the fully synthetical type B silica NUCLEODUR®


product – a state-of-the-art


silica for professional solutions. Several different surface modifications have been developed over the last years providing a full range of specified HPLC phases (e.g., C8 and C18 Gravity, C18 Isis, C18 Pyramid, PolarTec, Phenyl-Hexyl, Sphinx RP, PFP, HILIC). The recently launched NUCLEODUR®


C18 Gravity-SB features hydrophobic


and polar selectivity for a better retention of early eluting analytes. With the NUCLEOSHELL®


core-shell particle technology Macherey-Nagel


introduced a superficially porous silica for highest efficiency in HPLC. Besides the C18 modifications RP 18 and RP 18plus, innovative chemistries such as Phenyl- Hexyl, PFP, and HILIC are available. NUCLEOSHELL® demands in research and quality control.


columns fulfill the high For further information please visit: www.mn-net.com/HPLC


upag ag Wannenhofstr. 1, 5726 Unterkulm Phone +41 62 886 1160 sales@upagchem.com www.upagchem.com


UPASIL® Silicagels for chromatography


From 40Å up to 500Å in all stan- dard practicle sizes for preparative chromatograpy.


ADSORBING DRYING PURIFYING


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