Trace Level Determination of Polyether Ionophores in Feed
Table 5
Levels (mg/kg) of polyether ionophores in carry-over samples (turkey and broiler feed) from pelletizer and mixer lines analysed by both LC-MSMS and LC-UV.
Feed
Tonnes of feed
Monensin
Salinomycin
Narasin
LC-MSMS
LC-UV
LC-MSMS
LC-UV
LC-MSMS
LC-UV
Turkey A
0.6
29
17
<0.025
n.d.
1.9
n.d.
pelletizer
1.0
17
11
<0.025
n.d.
1.2
n.d.
line
2.0
8.0
6.9
<0.025
n.d.
0.74
n.d.
Turkey B
0.6
39
36
n.d.
n.d.
1.3
n.d.
pelletizer
1.0
18
16
n.d.
n.d.
0.60
n.d.
line
2.0
16
16
n.d.
n.d.
0.52
n.d.
Turkey C
0.8
0.60
n.d.
n.d.
n.d.
0.16
n.d.
mixer
2.0
0.73
n.d.
n.d.
n.d.
0.14
n.d.
line
3.2
0.58
n.d.
n.d.
n.d.
0.16
n.d.
Turkey D
0.8
5.3
4.3
n.d.
n.d.
0.35
n.d.
mixer
2.0
6.0
<4.0
n.d.
n.d.
0.24
n.d.
line
3.2
2.4
<4.0
n.d.
n.d.
0.28
n.d.
Broiler A
0.6
3.6
<4.0
n.d.
n.d.
70
39
pelletizer
1.0
3.6
4.3
n.d.
n.d.
51
32
line
2.0
3.3
4.1
n.d.
n.d.
16
14
Broiler B
0.6
0.070
n.d.
0.027
n.d.
47
30
pelletizer
1.0
0.066
n.d.
<0.025
n.d.
33
20
line
2.0
0.031
n.d.
<0.025
n.d.
17
8.3
Broiler C
0.8
<0.025
n.d.
<0.025
n.d.
6.0
4.0
mixer
2.0
<0.025
n.d.
<0.025
n.d.
0.54
n.d.
line
3.2
<0.025
n.d.
<0.025
n.d.
0.094
n.d.
Broiler D
0.8
0.35
n.d.
n.d.
n.d.
1.9
<5.0
mixer
2.0
0.33
<4.0
n.d.
n.d.
2.1
n.d.
line
3.2
0.27
n.d.
n.d.
n.d.
1.5
n.d.
n.d.: not detected Lasalocid, maduramicin, and semduramicin were not detected with LC-MS/MS. Lasalocid, maduramicin, and semduramicin were not measured with LC-UV.