Abstract: An apparatus for conducting split sampling gas chromatography of a liquid sample comprisinga vaporization chamber to receive a needle of a syringe,a first tube to receive the needle,a second tube directly adjacent the first tube and running substantially along the entire length of the first tube, the second tube accommodating a downward flow of cooling gas,a third tube surrounding the first tube and the second tube, thereby creating a annular space between the third tube and the first tube, the annular space accommodating an upward flow of gas exiting the third tube.

Abstract: In the split sampling gas chromatographic process for analyzing a sample by introducing the needle of a syringe into the vaporization chamber of a gas chromatographic column, discharging a liquid sample from the syringe needle into the vaporization chamber, and passing the vapors of the sample through a chromatographic column along with a carrier gas, the improvement which comprises passing a cooling gas over the entire length of the syringe needle, thereby to cool the sample passing therethrough. The cooling may be effected by a flow of liquid or gaseous CO.sub.2, air or nitrogen through a tube which surrounds the needle over its length during introduction of the sample.