Table 3.

Recovery rate determination of parathion and mixed solution of three OP pesticides by UCNP-LFIC strips.

Sample	Spiked level (ng/g or ng/mL)	Parathion			Mixed solution
		Detected amount (ng/g or ng/mL)	Recovery rate (%)	RSD (%) (n = 6)	Detected amount (ng/g or ng/mL)	Recovery rate (%)	RSD (%) (n = 6)
Cucumber	5	5.78	116	2.20	3.60	72	3.53
	10	9.50	95	12.96	6.70	67	12.55
	20	19.48	97	7.49	21.50	108	8.39
Tomato	5	5.14	103	17.42	4.40	88	12.90
	10	9.04	90	15.77	7.28	73	4.71
	20	19.50	98	7.29	18.46	92	18.31
Orange	12.5	10.35	83	1.95	9.60	77	14.28
	25	28.90	116	27.90	26.25	105	19.54
	50	51.75	104	10.11	55.25	111	7.97
Yuhangtang River	2.5	2.05	82	14.20	1.97	79	9.36
	5	5.13	103	2.14	6.01	120	10.53
	10	9.48	95	10.32	10.22	102	11.98
Tap Water	2.5	1.87	75	12.42	2.81	112	4.31
	5	4.98	100	10.35	5.23	105	10.23
	10	11.29	113	11.94	9.21	92	15.23
West Lake	2.5	2.34	94	8.47	2.9	116	6.51
	5	5.02	100	10.62	4.56	91	9.12
	10	11.52	115	5.24	9.92	99	14.56