Guard Column Articles & Analysis
7 articles found
Ion chromatography and sample filtration go hand-in-hand since this pretreatment step is advised for the majority of sample matrices. It is essential to avoid injecting particles, algae, or bacteria into the IC system, as these can jeopardize both the instrument and the separation column. Samples are often prepared manually, for example by using filtration or centrifugation to remove contaminants ...
ByB&W Tek
This is the third and final post in our series providing you with tips and tricks on the proper use of ion chromatography columns. In the first part, we mostly discussed the standard operation conditions as well as operational limits for columns, while in the second post, we focused on application related topics and what elution parameters can be changed to modify the separation performance. In ...
Remember the pores in the column frit need to be smaller than the particles inside the column. And when a column manufacturer says that a column has 3 or 5um particles know that that is an average. ...
For Raptor 5.0 um (superficially porous particle) columns, the maximum pressure rating for these columns and for older and more traditional HPLC instruments is 400 Bar/ 5800 psi. I would prefer to operate below 300 Bar/ 4350 psi as much as possible. EXP guard holder (catalog #25808) and EXP fittings that are used with Raptor ...
This injection method produces a pressure surge from the vaporizing solvent, forcing the analytes onto the pre-column. Recondensation of solvent takes place in the pre-column, which effectively focuses the analytes at the beginning of the analytical column. ...
Rxi technology unifies outstanding inertness, low bleed, and high reproducibility into a single high performance column line. Take variation out of the equation and get the most consistent results for trace-level analysis with Rxi columns. phases available Rxi-1ms Rxi-1HT Rxi-5ms Rxi-5Sil MS Rxi-5HT Rxi-XLB Rxi-624Sil MS Rxi-35Sil MS Rxi-17 Rxi-17Sil ...
This resulted in AOAC Method 2000.522 which has a streamlined cleanup followed by pre-column derivatization and GC/MS analysis. We show how this simplified sample preparation is suitable for the classic ionexchange/ post-column analytical protocol. Method Equipment LC with a binary pump Fluorescence detector Pickering Laboratories Vector PCX or Pinnacle ...