High oven temperature — cold on-column injection for the automated CGC analysis of high molecular weight compounds such as triglycerides
✍ Scribed by Termonia, M. ;Munari, F. ;Sandra, P.
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 444 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0935-6304
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✦ Synopsis
Modification of the Carlo-Erba cold on-column injector for (automated) analysis of high molecular compounds at high oven temperatures is described. The secondary cooling tube of the cold on-column injector is replaced by a lengthened tube through which a high air flow is directed. The injection site is maintained at 65-70°C while the oven is at high temperature (Z 3OOOC). For automated injection, a short deactivated precolumn of 22 to 30 cm X 0.53 mm i.d. is coupled to the analytical column via a butt connector with make-up gas supply. For a triglyceride mixture, automatically injected at 300°C, the mean %deviation forall peakareaswas 1.8%and themean%deviation for all retention times was 0.09% for five consecutive runs.