ISSN:
1040-7685
Keywords:
capillary GC
;
ammonia
;
helium
;
amines
;
chlorophenols
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A mixture of ammonia and helium was used as a carrier gas for capillary gas chromatographic analysis of aliphatic amines and dichlorophenols. The peak symmetry for aliphatic amines was drastically improved when the percentage of ammonia was 5-30%. The symmetry continued to improve, although less drastically, between 30-100%ammonia. The capacity factors of the amines decreased with increasing ammonia content up to 100%. 2,5-Dichlorophenol and 2,6-dichlorophenol could not be resolved when helium alone was used as the mobile phase with a column of intermediate polarity (cyanopropylmethylphenylsilicone). Complete separation was, however, achieved by increasing the ammonia content in the carrier gas to 50%. The ratio of the capacity factors (k'NH3/k'He) for the dichlorophenols increased linearly with increasing ammonia percentage up to 100% on the methylsilicone and cyanopropylmethylphenylsilicone columns.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mcs.1220050608
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