Table 4.

Leaching of the synthesized ILs during extraction in spiked synthetic as well as natural water feed solutions for an extraction time of 1 h, n = 3.

Sample	Leaching % ±SD
	[P66614][HNA]	[P1888][HNA]	[N1888][HNA]
Pure water	0.227 ± 0.001	0.359 ± 0.049	0.294 ± 0.003
Water-NaCl	0.184 ± 0.003	0.412 ± 0.008	0.355 ± 0.054
Water-HS	0.183 ± 0.004	0.297 ± 0.073	0.261 ± 0.057
Water-HS-NaCl	0.131 ± 0.018	0.411 ± 0.020	0.310 ± 0.050
Drinking water	0.223 ± 0.023	0.405 ± 0.027	0.416 ± 0.123
WWTP effluent	0.068 ± 0.014	0.221 ± 0.024	0.239 ± 0.024
Seawater	0.171 ± 0.006	0.464 ± 0.038	0.468 ± 0.068
Hypersaline water	0.156 ± 0.008	0.341 ± 0.058	0.297 ± 0.032