Feh4r and Vogelbruchg reported: atmosphere at a bath temperature of 45-50'. The residue was subjected to a vacuum of 100 mm. for 5 min. A vapor phase chromatogram of this concentrate showed two peaks, one for the thiol and one for ether. A rough estimate of the amount of mercaptan present was made from the ratio of the areas of the mercaptan and ether peaks. The retention times for the thiol and ether were 2.30 and 0.74 min., ...