Table 5 Frequency of the water bending mode (δHOH) 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

δHOH frequency/cm−1

Pure water

1636

Top layer—basic

1641

Top layer—circum-neutral

1643

Top layer—acidic

1654a

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

1640

  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.
  2. aDetermined through second derivative analysis.