In the July 1975 issue of Environmental Science and Technology, there appeared a note by Devine and Partington (1) reporting carryover of sulfate in the direct distillation of fluoride samples of 95-1300 mgA. as SO42-. In synthetic samples containing known amounts of fluoride and sulfate, fluoride values as much as four times the true concentration were observed.

No abstract

Summary None of the procedures tried gave quantitative recoveries of saturated acids. The results obtained by the lead salt‐amylene mthod were better than those obtained with lead salts and petroleum ether. Unsaturated acids could not be determined by the amylene procedure, because of the formation of non‐volatile polymerization products from the solvent. The use of ammonium and calcium salts did not lead to a successful separation. An attempted chemical separation by means ofp‐nitrosodimethylaniline was unsuccessful because of the insolubility of the reaction product in dilute acid.