Abstract
A procedure for the construction of open tubular gas chromatographic columns suitable for use at elevated temperatures has been developed. The use of a quarternary phosphonium halide, benzyltriphenylphosphonium chloride, aids in coating the wall of a tube with substrate and causes it to adhere firmly. This technique produces a stable column that is easily reproduced. Differential thermal analysis was used to study the temperature stability of various GC substrates. Combining the proper substrate with the phosphonium halide results in columns that are usable to 250°C and above.
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