Simple Electrochemical Determination of Surface-Active Substances in Natural Waters

Table 1

Determination of surface-active substances in freshwater samples by electrochemical method. Concentrations are expressed in equivalent amounts of two different standards (Triton-X-100 and humic acid). Concentrations of dissolved organic carbon (DOC) in the samples are given too. Samples were collected and analyzed on March 3, 2006.

Freshwater samples	DOC	SAS	SAS
	mg C/L	eqiuv. T-X-100, mg/L	equiv. Humic a., mg/L
Drava River, Osijek	4.91	0.067	15.97
Danube River, Batina	4.21	0.079	18.78
Kopački Rit, Wetland	10.13	0.077	18.47