Analysis of headspace samples using off-line sorbent trapping coupled with automated thermal desorption and splitless injection onto a cryogenically cooled wide bore capillary column
✍ Scribed by Haynes, L. V. ;Steimle, A. R.
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 421 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0935-6304
No coin nor oath required. For personal study only.
✦ Synopsis
Gas chromatographic equipment and procedures are described for automated splitless injection of pseudo-static headspace samples collected externally onto a sorbent trap. The GC microprocessor controls, in sequence, carrier gas backflushing of the sorbent trap for water removal, splitless thermal desorption into a cryogenically cooled wide bore (0.53 mm i.d.) capillary column and oven temperature programming. The method has been routinely applied for profiling the mid-to-high boiling compounds (bp 80-225OC) in the headspace of a variety of foods and beverages. Method criteria, advantages and limitationsare discussed. FID and NPD chromatograms for brewed coffee and peanut butter volatiles are presented as typical examples.