Table 6 Frequency of the C–O stretch of THF for each sample, prepared either with or without 1 M lauric acid.

From: Decontamination of water co-polluted by copper, toluene and tetrahydrofuran using lauric acid

Sample

Frequency C–O stretch/cm−1

Pure THF

1066

Top layer—acidic

1056

Top layer—circum-neutral

1053

Top layer—basic

1050

3:7 THF:water mixture (without lauric acid)

1041

  1. In the table, the rows labelled as ‘top layer’ refer to the top layer of 3:7 THF:water (v/v) mixtures separated with 1 M lauric acid.