The comparison of SDS concentration in laundry wastewater and shampoo was evaluated using DPV at SPCE–ZnONPs/MIP and UV-vis spectrometry technique.

Sample	DPV	UV-visible	t exp	t table
	Concentration (μM ± % RSD)	Concentration (μM ± % RSD)
Laundry wastewater	370.6 ± 1.95	342.6 ± 3.02	3.840	4.3
Shampoo	524.7 ± 1.48	522.3 ± 3.07	0.015	4.3