Gas Chromatography Method for Separation Synthesized Methylethoxysilan Compounds

الملخص

Abstract
Modification of gas chromatographic technique for separation
methylethoxysilane compounds which were synthesized by the reaction the absolute
ethanol with methylchlorosilane compounds. The addition of dry absolute ethanol to
methylchlorosilane compounds in the presence of a dry stream of nitrogen gas to
eliminate the liberated HCl gas. This method was found to be the suitable method for
preparation methylethoxysilane compounds. The optimum parameter selected after
careful and precise studies were between 20 – 30 ml \ min to carriers gas flow rate,
while applied temperature of detector and injection part are 250 °C and 225 °C
respectively. The results showed that suitable chromatographic column for the
separation of methylchlorosilane compounds is 50% [5% dioctyl phthalate ] + 50%
[10% OV- 101 ] .While 10 % OV – 101 column was found to be the best for the
separation of methylethoxysilane compounds . Accordingly , a linear relationship for
the calibration curve between concentration and peak area was achieved for
methylchlorosilane and methyl ethoxysilane with correlation coefficients were ranged
between 0.9991- 1. The results of percentage RSD for the methylchlorosilane and
methylethoxysila were 0.51-2.08 and 0.053-1.37 respectively.