Determination of catechol and hydroquinone in water sample (n = 3).

Analyte	Sample	Added (μM)	Found (μM)	Recovery (%)	RSD (%)
Catechol	Lake water	10	10.30	103.0	2.64
		20	20.42	102.1	3.05
		50	48.85	97.7	2.51
	Tap water	10	10.05	100.5	2.08
		20	20.04	100.4	3.00
		50	50.04	100.4	1.52
Hydroquinone	Lake water	10	10.05	100.5	2.51
		20	19.4	97.4	2.00
		50	52.8	105.6	2.64
	Tap water	10	10.6	106.7	4.04
		20	20.0	100.0	1.73
		50	50.5	101.0	0.57