How to Select Guard Columns and Pre-columns?

Inline Filters As in-line filters, pre-columns and guard columns have many similarities and differences simultaneously. ONE How to Differentiate Pre-columns From Guard Columns? Being connected before column, both pre-columns and guard columns can prevent solid impurities from blocking the frit. The only thing inside pre-column is a frit that filters impurities whose particles are Read more…

Materials of Filter Membrane

Filtration is a common step in our experiment, which can not only effectively prevent the blockage of frit and the damage of pump valve, but also avoid the peak shape variation and impurity peaks. Therefore, it is no denying that filtration plays a significant role in the protection of the instrument and the experimental Read more…

Welchrom® Immunoaffinity Column

Welchrom® Immunoaffinity Column is used to separate and purify mycotoxins from samples based on specific reactions between antigens and antibodies. Antibodies in the immunoaffinity column suspend in the gel by covalent bonding and specifically adsorb the mycotoxin in the sample. If the sample being tested contains the mycotoxin, the toxin Read more…

WelView® Phote Chemical Reactor

P/N:00836-00003 Features ● 20% higher derivative effect than the previous generation ● Extended 450% lifetime compared to previous generation ● Additional leakage warning ● With light status warning and working status indicator ● Additional light change warning and other practical functions ● The working state can be monitored in the distance through the screen Improved Read more…

GC Comsumables

Outline Welch Materials have concentrated on GC R&D and production for many years, and each column would be tested strictly before selling with attached column report. Welch columns are characterized by stable properties, high column efficiency and good reproducibility. Welch Gas column can be divided into two types: WM Series Read more…