Concentrations of MC-LR in real water samples (n = 3)^a.

Water samples	Original (μg L−1)	Spiked (μg L−1)	Measured (μg L−1)	RSD (%)	Recoveries (%)
Tap water	nd	0.2	0.21	5.32	105
	nd	2	1.89	3.07	94.5
	nd	8	7.74	4.89	96.8
Pond water	nd	0.2	0.19	6.34	95
	nd	2	2.09	4.73	104.5
	nd	8	8.21	3.45	102.6
Yuxiu lake	0.09	0.2	0.27	7.12	93.1
	0.11	2	2.14	3.68	101.4
	0.82	8	8.62	5.2	97.7

^and: not found.