“…Later on Ryce and Bryce used tricresyl phosphate on Celite 545 as the stationary phase for separating mercaptans, sulfides, disulfides, and thiophane. 75 This phase easily separated sulfur compounds from light hydrocarbons and lower alcohols and benzene from thiophene at 77°C. Another polar phase, β,β'-iminodipropionitrile, was used by Karchmer to separate sulfur compounds (28.6% of ß,/^-iminodipropionitrile was used on a Celite 545 support).…”