183 / 302
5
Table 3. Compounds monitored by online SPE LC/MS, method parameters, and instrument limits of detection
Compound
Retention
Time
(min)
Precursor
Mass
(
m/z
)
Product
Mass 1
(
m/z
)
CE Mass 1
(V)
Product
Mass 2
(
m/z
)
CE Mass 2
(V)
LOD
(ng/L)
Acephate
4.4
184.0
143
10
95
25
0.24
Allethrin
12.4
303.2
135
15
220
20
7.8
Ametryn
9.6
228.1
186
19
96
26
0.12
Atraton
8.2
212.2
170
19
100
29
0.12
Atrazine
9.7
216.1
174
16
104
29
0.12
Atrazine Desethyl
7.6
188.1
146
16
104
30
0.12
Atrazine-desisopropyl
6.5
174.1
132
17
104
28
0.24
Azoxystrobin
10.4
404.1
372
15
329
33
0.12
Benzotriazole
6.6
120.1
65
25
92
18
7.8
Bioresmethrin
13.2
339.2
171
14
293
15
62.5
Bloc (Fenarimol)
10.3
331.2
268
23
311
33
0.24
Carbaryl
9.3
202.0
145
12
127
30
0.12
Carbendazim
6.0
192.1
160
20
132
33
0.12
DEET
9.8
192.1
119
19
91
34
0.98
Etofenprox
13.6
394.0
177
14
135
26
3.9
Fenamiphos
11.2
304.1
217
25
234
17
0.12
Fluoxastrobin
11.0
459.1
427
18
188
38
0.5
Fluridone
10.3
330.1
309
37
310
29
0.12
Flutolanil
10.8
324.0
262
18
242
26
0.06
Formasulfuron
9.4
453.1
183
25
272
15
0.12
Halosulfuron-methyl
11.2
435.1
182
20
139
50
0.12
Imidacloprid
6.9
256.0
209
18
175
20
0.06
Iprodione_a
11.3
330.0
245
16
-
-
15.63
Iprodione_b
11.3
332.0
247
16
-
-
31.25
Metalaxyl
9.8
280.2
220
17
160
30
0.06
Metoprolol
7.3
268.2
116
17
191
20
0.24
Oxadiazon
12.4
345.1
303
15
220
20
3.9
Pramoxine
9.6
294.2
128
22
100
32
0.12
Prometron
9.1
226.1
142
24
170
19
0.12
Propanmide
10.8
256.0
173
25
209
20
0.12
Quinclorac
8.3
242.0
161
34
224
18
7.8
Thiencarbazone-methyl
8.7
391.0
359
10
230
20
3.9
Thiophanate-methyl
8.9
343.0
151
24
311
13
0.24
Tramadol
7.2
264.2
58
18
246
12
0.06