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.

FeedTonnes of feedMonensinSalinomycinNarasin
LC-MSMSLC-UVLC-MSMSLC-UVLC-MSMSLC-UV

Turkey A0.62917<0.025n.d.1.9n.d.
pelletizer1.01711<0.025n.d.1.2n.d.
line2.08.06.9<0.025n.d.0.74n.d.

Turkey B0.63936n.d.n.d.1.3n.d.
pelletizer1.01816n.d.n.d.0.60n.d.
line2.01616n.d.n.d.0.52n.d.

Turkey C0.80.60n.d.n.d.n.d.0.16n.d.
mixer 2.00.73n.d.n.d.n.d.0.14n.d.
line3.20.58n.d.n.d.n.d.0.16n.d.

Turkey D0.85.34.3n.d.n.d.0.35n.d.
mixer 2.06.0<4.0n.d.n.d.0.24n.d.
line3.22.4<4.0n.d.n.d.0.28n.d.

Broiler A0.63.6<4.0n.d.n.d.7039
pelletizer1.03.64.3n.d.n.d.5132
line2.03.34.1n.d.n.d.1614

Broiler B0.60.070n.d.0.027n.d.4730
pelletizer1.00.066n.d.<0.025n.d.3320
line2.00.031n.d.<0.025n.d.178.3

Broiler C0.8<0.025n.d.<0.025n.d.6.04.0
mixer 2.0<0.025n.d.<0.025n.d.0.54n.d.
line3.2<0.025n.d.<0.025n.d.0.094n.d.

Broiler D0.80.35n.d.n.d.n.d.1.9<5.0
mixer 2.00.33<4.0n.d.n.d.2.1n.d.
line3.20.27n.d.n.d.n.d.1.5n.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.