Magnetic chitosan-zeolite composite as an adsorbent in ultrasound-assisted magnetic solid phase extraction of tetracyclines in water samples

Journal of Analytical Science and Technology

Table 2 Validation of the UA-MSPE/HPLC-DAD method

Analytes	Added (µg L⁻¹)	Influent		Effluent		River
Analytes	Added (µg L⁻¹)	Measured (µg L⁻¹)	% R	Measured (µg L⁻¹)	% R	Measured (µg L⁻¹)	% R
Tetracyclines
Oxytetracycline	0	–		–		–
	5	4.61	92.2	4.77	95.4	4.79	95.7
	40	38.57	96.4	38.99	97.5	39.69	99.2
	100	98.64	98.6	99.92	99.9	100.54	100.5
Tetracycline	0	–		–		–
	5	4.77	95.3	4.89	97.7	4.94	98.8
	40	38.86	97.2	39.39	98.5	39.86	99.7
	100	99.48	99.5	100.22	100.2	100.67	100.7
Doxycycline	0	–		–		–
	5	4.52	90.3	4.58	91.5	4.59	91.8
	40	37.22	93.1	38.30	95.8	39.08	97.7
	100	96.61	96.6	98.27	98.3	98.83	98.8