Determination of Carbon Disulfide in Natural Waters by Adsorbent Preconcentration and Gas Chromatography with Flame Photometric Detection

Abstract

Carbon disulfide (CS2) in natural waters is determined at the picomolar level by a combination of preconcentration on Carbosleve G and gas chromatography with a flame photometric detector. The volatile carbon disulfide is stripped out of up to 1.8 L of sample by a nitrogen gas stream and preconcentrated on a Carbosleve adsorption tube. This tube is then attached to the gas chromatograph/flame photometric detector system and heated to desorb CS2, which is collected In a liquid-nitrogen-cooled trap, released by heating the cold trap, separated on a Chromosll 330 column, and detected by a flame photometric detector. The CS2 peak is recorded and Integrated electronically. The detection limit is ca. 1 pmol L-1 CS2. The analytical precision is 9%. Results of analyses of natural water samples are presented. © 1987, American Chemical Society. All rights reserved.