Other measurement devices
Here you will find a large selection of different measuring instruments such as watches for laboratory use: Laboratory stopwatches with metal or plastic housing, digital laboratory stopwatches, short time meters and many others. In addition, you will also find preparation sets, biophotometers, biologists' sets, chemists' sets, as well as sets for microscopy and anatomy.
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
