OMB First to Final Action Recommendation Checklist 11-12-18
Determination results of multi-residues in tea by LC-MS/MS
Green tea
No.
Retention time/min
Spike levels ( g/kg)
Calibration curve
Recovery/%
Pesticides
RSD/%
R2
Slope
Intercept
No.1
No.2
No.3
No.4
No.5
AVE
IS
chlorpyrifos-methyl
17.618
1
imidacloprid
5.663
0.9987
0.0850
0.0856
45
115.4
103.8
114.8
111.4
105.3
110.1
4.87
2
propoxur
8.264
0.9989
1.8593
31.8969
50
108.6
93.3
114.0
108.4
108.1
106.5
7.30
3
monolinuron
9.409
0.9980
0.0116
-0.0314
20
87.3
91.6
93.1
86.3
91.1
89.9
3.28
4
clomazone
11.107
0.9991
0.7681
0.9358
20
93.8
94.0
100.2
96.6
105.5
98.0
5.00
5
ethoprophos
13.899
0.9991
0.3678
1.0466
20
101.1
92.7
103.0
97.1
104.0
99.6
4.65
6
triadimefon
14.096
0.9985
0.2186
-1.0063
20
103.6
94.2
102.9
98.2
104.2
100.6
4.28
7
acetochlor
15.138
0.9990
0.2468
-0.3841
40
99.4
94.0
102.2
99.4
105.2
100.0
4.14
8
flutolanil
15.671
0.9969
0.4262
-0.8631
20
105.4
96.1
105.9
101.6
105.0
102.8
4.01
9
benalaxyl
16.24
0.9990
2.5914
18.3183
20
99.9
92.5
102.5
98.9
104.0
99.6
4.44
10
kresoxim-methyl
16.571
0.9946
0.1833
5.8772
200
107.1
96.0
92.0
103.6
103.7
100.5
6.21
11
picoxystrobin
17.119
0.9965
1.4234
1.7725
20
133.5
97.5
97.4
102.5
110.3
108.2
13.93
12
pirimiphos-methyl
16.453
0.9999
1.2458
5.7368
20
93.1
90.0
94.3
91.7
98.5
93.5
3.45
13
diazinon
17.09
0.9997
2.9582
-2.6557
20
105.9
95.5
97.4
97.1
108.8
101.0
5.93
14
bensulide
17.405
0.9952
0.2903
0.2172
60
116.7
93.3
99.7
103.2
106.0
103.8
8.30
15
quinoxyfen
17.491
0.9961
0.6027
4.4482
100
81.6
95.6
89.3
93.8
99.6
92.0
7.50
16
tebufenpyrad
18.016
0.9941
0.0441
-0.3803
20
114.5
99.8
97.9
105.3
106.4
104.8
6.22
17
indoxacarb
18.262
0.9992
0.0263
-0.0882
20
100.6
94.3
110.6
104.2
104.9
102.9
5.84
18
trifloxystrobin
18.311
0.9978
0.4936
-1.0594
20
101.7
98.6
101.7
100.2
108.9
102.2
3.85
19
chlorpyrifos
18.884
0.9928
0.0072
-0.0321
200
111.4
126.6
92.8
87.2
87.1
101.0
17.26
20
butralin
19.292
0.9956
0.0022
-0.0035
20
72.1
84.2
82.1
99.2
128.0
93.1
23.37
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