Quantitation and Validation of Macrolide Endectocides in Raw Milk by Negative Ion Electrospray MS/MS
Bibliographic record
Abstract
Macrolide endectocides (abamectin, doramectin, emamectin, eprinomectin, ivermectin, and moxidectin) are used to treat animals against a variety of parasites. They are approved for use with food animals, but require long withdrawal times. Two compounds, eprinomectin and moxidectin, are approved for use with lactating cattle and have established maximum residue limit values of 20 and 40 microg/kg, respectively. The remaining compounds may appear in milk if there is off-label or accidental use. This method is capable of quantitating and confirming the presence of six of the macrolide endectocides over the concentration range 1-60 microg/kg (parts per billion). Selamectin is used as the internal standard. The compounds are extracted with C18 solid-phase extraction under basic conditions and quantitated by negative ion LC-MS/MS using one selected reaction monitoring transition, with a second transition used for verification. The limits of detection were determined from between-day experiments as 0.14, 0.14, 0.18, 0.24, 0.25, and 0.25 microg/kg for abamectin, doramectin, emamectin, eprinomectin, ivermectin, and moxidectin, respectively. The detection capability CCbeta for eprinomectin was measured as 28.5 microg/kg, and 50.0 microg/kg for moxidectin using five milk matrices.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".