. 2018 Feb 14;23:7. doi: 10.1186/s12199-018-0696-1

Table 2.

Concentrations of OPs in tea from the 2013–2014 National Monitoring Program

OPs	Samples analysed	Detected samples	Positive rate (%)	Concentrations of detected samples in tea (mg/kg)
OPs	Samples analysed	Detected samples	Positive rate (%)	Mean	P₅₀	P₉₅	P_97.5	P_99.9	Max
Chlorpyrifos	1660	112	6.75	0.138	0.060	0.594	0.788	1.900	1.900
Triazophos	1619	42	2.59	0.152	0.125	0.427	0.801	0.830	0.830
Disulfoton	1623	12	0.74	0.265	0.295	0.706	0.706	0.706	0.706
Dimethoate	1642	11	0.67	0.261	0.220	0.980	0.980	0.980	0.980
Monocrotophos	1634	10	0.61	0.201	0.095	0.909	0.909	0.909	0.909
Parathion-methyl	1646	10	0.61	0.052	0.041	0.162	0.162	0.162	0.162
Ethion	1638	9	0.55	0.066	0.020	0.240	0.240	0.240	0.240
Tolclofos-methyl	386	2	0.52	0.080	0.080	0.080	0.080	0.080	0.080
Acephate	1635	8	0.49	0.033	0.031	0.077	0.077	0.077	0.077
Methamidophos	1640	8	0.49	0.057	0.033	0.120	0.120	0.120	0.120
Dichlorvos	1638	7	0.43	0.055	0.014	0.130	0.130	0.130	0.130
Omethoate	1628	6	0.37	0.068	0.070	0.930	0.930	0.930	0.930
Fenitrothion	1638	6	0.37	0.033	0.016	0.100	0.100	0.100	0.100
Parathion	1642	6	0.37	0.024	0.008	0.073	0.073	0.073	0.073
Phorate	1649	6	0.36	0.006	0.003	0.017	0.017	0.017	0.017
Chlorpyrifos-methyl	1598	5	0.31	0.020	0.005	0.080	0.080	0.080	0.080
Phosalone	1616	5	0.31	0.047	0.025	0.152	0.152	0.152	0.152
Methidathion	1629	5	0.31	0.076	0.044	0.170	0.170	0.170	0.170
Phosmet	1575	3	0.19	0.013	0.013	0.013	0.013	0.013	0.013
Malathion	1645	3	0.18	0.012	0.012	0.012	0.012	0.012	0.012
Pyridaphethione	40	0	0	–	–	–	–	–	–
Diazinon	6	0	0	–	–	–	–	–	–
Trichlorfon	3	0	0	–	–	–	–	–	–
Quinalphos	3	0	0	–	–	–	–	–	–
Phoxim	3	0	0	–	–	–	–	–	–