Table of Contents
What is DB in GC column?
DB-1 Columns Agilent J&W DB-1 is nonpolar and low-bleed, and operates under high temperature limits. It is an excellent choice for general purpose use in a wide variety of applications. Precision-engineered DB-1 is bonded, crosslinked and solvent rinsable, and is equivalent to USP phase G2.
What is DB 5 column?
DB-5 Columns Agilent J&W DB-5 is nonpolar and low bleed, and is available in a range of column dimensions. DB-5 is also bonded, crosslinked, and solvent-rinsable, and has a high temperature limit. It is equivalent to USP phase G27.
What is the stationary phase of GC column?
A stationary phase is the film chemically bonded to or coated on the inner wall of a capillary column, and should be selected based on the application to be performed.
How do I choose the right GC column?
The selection of the proper capillary column for any application should be based on four significant factors: stationary phase, column I.D., film thickness, and column length. The practical effects of these factors on the performance of the column are discussed briefly in this section, in order of importance.
What is DB 624 GC column?
DB-624 Columns Agilent J&W DB-624 is recommended for EPA methods 502.2 and 8021, as well as for fast GC/MS volatiles analysis. It is specifically designed for the analysis of volatile priority pollutants and residual solvents.
What is DB 624?
Agilent J&W DB-624 is recommended for EPA methods 502.2 and 8021, as well as for fast GC/MS volatiles analysis. It is specifically designed for the analysis of volatile priority pollutants and residual solvents.
What is the split ratio in GC?
The split ratio is calculated by dividing the column carrier gas flow rate into the split vent flow rate. This value is the relative amount of carrier gas flowing out of the split vent compared with the column flow rate.
What is film thickness in GC column?
Film thickness in capillary columns, is in general between 0.1 and 10 μm for liquid stationary phases such as Rtx-1, 17 and wax. Mostly used are the 0.25 micron films. Thin films are used for the analysis of high boiling materials and thick films for volatiles.
What is stationary phase in HPLC?
In liquid–liquid chromatography the stationary phase is a liquid film coated on a packing material, typically 3–10 μm porous silica particles. Because the stationary phase may be partially soluble in the mobile phase, it may elute, or bleed from the column over time.