Macherey-Nagel GC Columns
For more than a century, the German quality company Macherey-Nagel has not only been building its own paper mill for the production of filtration products, but also produces articles in the fields of rapid test analysis, water analysis, chromatography, bioanalytics, molecular biology and chemical analysis.
In the field of gas chromatography, Macherey-Nagel offers OPTIMA high-performance capillary columns, PERMABOND capillary columns and columns for specific GC separations (i.e., enantiomer separation and Fast GC ).
If you have any questions about the products of Macherey Nagel, please do not hesitate to contact us - we will be happy to help you.
Column description
Here you will find the brand name of the respective manufacturer for the column, e.g. "XBridge" columns from Waters. It is not necessarily recognizable which type of column the respective name refers to. If you have any questions, please do not hesitate to contact us.
Package specification
The packing specification describes the material of the stationary phase. The name indicates whether a functional group is bound to the carrier material (silica gel, polymer) and, if so, which functional group. Depending on the bound functional group (e.g. C18 chain), this results in the separation mode of the column (reversed phase).
Length
Depending on the type of application or system, different lengths of HPLC columns are used. The length of the column together with the internal diameter defines the column volume. For preparative separations, for example, columns from 250 mm in length with a larger internal diameter are often used; this allows more material to be separated in one run. If you have any questions about suitable HPLC column dimensions for your analysis, please do not hesitate to contact us.
Inner diameter
In addition to the length of the column, the inner diameter (ID) determines the column volume. The larger the internal diameter, the larger the volume and the higher the consumption of solvent. The inner diameter also influences the concentration of the analyte in the detector. For analyses where only a small amount of sample is available, it is advisable to use the smallest possible inner diameter. If an existing method is optimized from a larger to a smaller inner diameter, it must be ensured that the flow is adjusted for a comparable separation so that a constant linear velocity u is obtained
Max operating temperature
USP number
Monograph methods are frequently used, especially in the pharmaceutical industry. Users must then adhere to the requirements of the European Pharmacopeia (EP) or the US Pharmacopeia (USP), for example. The USP classification is based on the type of packaging material used. Classification "L1", for example, refers to an octadecylsilyl phase, better known as a C18 phase.
