343 / 471
Table 2014.09F. LC-MS/MS retention times, ion transitions, collision energies, LODs, and LOQs for the 20 pesticides ofinterest in this study
No.
Pesticide
Retention
time, min
Quantifying precursor/
product ion transition
Qualifying
precursor/product
ion transition
Collision energy, V Fragmentation,
V
LOQ,
μg/kg
LOD,
μg/kg
ISTD
Chlorpyrifos-methyl
16.01
322.0/125.0
322.0/290.0
15;15
80
1
Imidacloprid
3.81
256.1/209.1
256.1/175.1
10;10
80
22.0
11.0
2
Propoxur
5.89
210.1/111.0
210.1/168.1
10;5
80
24.4
12.2
3
Monolinuron
6.83
215.1/126.0
215.1/148.1
15;10
100
3.6
1.8
4
Clomazone
8.3
240.1/125.0
240.1/89.1
20;50
100
0.4
0.2
5
Ethoprophos
11.37
243.1/173.0
243.1/215.0
10;10
120
2.8
1.4
6
Triadimefon
11.64
294.2/69.0
294.2/197.1
20;15
100
7.9
3.9
7
Acetochlor
12.94
270.2/224.0
270.2/148.2
5;20
80
47.4
23.7
8
Flutolanil
13.25
324.2/262.1
324.2/282.1
20;10
120
1.1
0.6
9
Benalaxyl
14.40
326.2/148.1
326.2/294.0
15;5
120
1.2
0.6
10
Kresoxim-methyl
14.58
314.1/267
314.1/206.0
5;5
80
100.6
50.3
11
Picoxystrobin
14.99
368.1/145.0
368.1/205.0
20;5
80
8.4
4.2
12
Pirimiphos methyl
15.05
306.2/164.0
306.2/108.1
20;30
120
0.2
0.1
13
Diazinon
15.20
305.0/169.1
305.0/153.2
20;20
160
0.7
0.4
14
Bensulide
15,45
398.0/158.1
398.0/314.0
20;5
80
34.2
17.1
15
Quinoxyfen
16.60
308.0/197.0
308.0/272.0
35;35
180
153.4
76.7
16
Tebufenpyrad
16.82
334.3/147.0
334.3/117.1
25;40
160
0.3
0.1
17
Indoxacarb
16.76
528.0/150.0
528.0/218.0
20;20
120
7.5
3.8
18
Trifloxystrobin
16.82
409.3/186.1
409.3/206.2
15;10
120
2.0
1.0
19
Chlorpyrifos
17.65
350.0/198.0
350.0/97.0
20;35
100
53.8
26.9
20
Butralin
17.98
296.1/240.1
296.1/222.1
10;20
100
1.9
1.0
Table 2014.09G. SRM acquisition parameters by LC-MS/MS analysis for the 20 pesticides
Group
Start time,
min
Monitored ion transitions,
m/z
Dwell time,
ms
1
0
256.1/209.1, 256.1/175.1, 210.1/111.0, 210.1/168.1, 240.1/125.0, 240.1/89.1, 243.1/173.0,
243.1/215.0, 294.2/69.0, 294.2/197.1,215.1 / 126.0
；
215.1 / 148.1
30
2
12
270.2/224.0, 270.2/148.2, 306.2/164.0, 306.2/108.1, 324.2/262.1, 324.2/282.1, 326.2/148.1,
326.2/294.0, 305.0/169.1, 305.0/153.2, 314.1/267.0, 314.1/206.0, 322.0/125.0, 322.0/290.0,
368.1 / 145.0, 368.1/205.0, 398.0 / 158.1, 398.0 / 314.0
20
3
16.4
334.3/147.0, 334.3 / 117.1, 528.0 / 150.0, 528.0 / 218.0, 409.3/186.1, 409.3 / 206.2, 296.1 /
240.1, 296.1 / 222.1,350.0/198, 350.0/97.0,308.0 / 197.0
；
308.0/272.0
25
Candidates for 2016 Method of the Year
283