What is DB 624 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.
How does Column length affect gas chromatography?
A longer column generally improves the separation. The trade-off is that the retention time increases proportionally to the column length and a significant peak broadening will be observed as well because of increased longitudinal diffusion inside the column.
What does the oven do in gas chromatography?
The column ends have fittings (often “Swagelok” brand) so that they can be connected to matching fittings in the “oven” of the gas chromatograph. The oven has three functions: It keeps the column temperature constant. It allows operation at elevated temperature (faster; perhaps necessary to vaporize the sample).
How do you increase peak separation in GC?
Steps that can be taken to improve early eluting peak shape:
- Use a split injection. This limits the amount of solvent that gets onto the column and reduces how much analyte dissolves in pooled solvent.
- Decrease the injection volume.
- Use a pressure pulsed injection.
- Use a guard column.
- Increase the column film thickness.
When to use Agilent J and W 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. Items were successfully added to your cart!
Is the Agilent db-624ui ultra inert GC column?
Specifically designed and tested Agilent J&W DB-Select 624UI for USP <467> resolves critical pairs. Agilent’s J&W Ultra Inert GC column portfolio has expanded to include our mid-polarity 624 stationary phase.
How does ultra inert deactivation work for Agilent?
Ultra Inert deactivation and manufacturing: Agilent’s industry-leading manufacturing process – combined with optimized chemistries and design advancements – improve both inertness and trace-level sensitivity with proven column-to-column reproducibility. This is accomplished with no trade-offs in bleed or stationary phase selectivity.
How big is the J & W db-624 GC column?
J&W DB-624 GC Column, 25 m, 0.20 mm, 1.12 µm, 5 inch cage. Phase: DB-624. Film Thickness: 1.12 µm. Format: 5 inch. Length: 25 m.