Key facts
- Brand
- Agilent
- Model
- 5975C MSD
- Documents
- 2
- Languages
- EN
- Last added
- 2012-07-02
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Capillary Flow Technology for GC/MS: Efficacy of the Simple Tee Configuration for Robust Analysis Using Rapid Backflushi
This document describes an application of Capillary Flow Technology (CFT) for Gas Chromatography-Mass Spectrometry (GC/MS). It illustrates how a pressure-controlled tee (PCT) arrangement, utilizing a purged union and electronic pressure control devices, can eliminate late-eluting matrix components without venting the mass spectrometer. The method uses rapid backflushing to remove high-boiling contaminants that typically foul the ion source.
Read onlineAgilent 5975C MSD specifications
| Sample Volume | 10-mL water samples |
|---|---|
| Vial Type | 20-mL headspace vial |
| Internal Standard Concentration | 800 ng/L (800 ppt) |
| Target Analytes | 60 target analytes |
| Calibration Levels | 45 to 1,250 ng/L |
| Column Type | DB-624, 20 m x 0.18 mm |
| Carrier Gas | He, constant pressure (95 kPa) |
| Run Time | 25-min run |
Source: Agilent 7890A GC/5975C MSD VOC Analysis Application Note
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How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the primary benefit of using a pressure-controlled tee (PCT) arrangement?
It provides rapid backflushing to eliminate late-eluting matrix components, improving run-to-run response robustness and reducing ion source fouling.
How does backflushing affect analyte signal stability over multiple injections?
Using PCT with backflushing maintains signal within about 10 percent of the first injection's response, whereas continuous columns without backflushing can lose more than 30 percent.
What system was used for the analysis?
The analyses were performed on an Agilent 7890A GC/5975C MSD system.
From: Agilent 7890A GC/5975C MSD VOC Analysis Application Note
What reference water was used for calibration?
Bottled drinking water (Evian) was used for reference water blanks.
From: Agilent 7890A GC/5975C MSD VOC Analysis Application Note