Table 4. Concentrations of HGA, MCPrG, and Respective Metabolites in Bulk Milk Tank Samples of Cows (Herd of 87 Cows, 5 Cows Included in the Study)a.
| day | time | HGA (μg/L)b | MCPA-G (μg/L)c | MCPA-C (μg/L)d | MCPrG (μg/L)e | MCPF-G (μg/L)f |
|---|---|---|---|---|---|---|
| 1 | pm | −f | 5.2 | NQg | − | − |
| 2 | am | − | 3.0 | − | − | − |
| pm | − | 4.7 | NQ | − | − | |
| 3 | am | − | 3.9 | − | − | − |
| pm | − | 5.0 | − | − | − | |
| 4 | am | − | 2.8 | − | − | − |
a
Dotted lines show the time of emptying of the bulk tank.
b
Hypoglycin A (HGA).
c
Methylenecyclopropylacetyl-glycine (MCPA-G).
d
Methylenecyclopropylacetyl-carnitine (MCPA-C).
e
Methylenecyclopropylglycine (MCPrG).
f
−, not detected.
g
NQ: value below LOQ but above LOD (for MCPA-G, LOD = 0.30 μg/L; for MCPA-C, LOD = 0.23 μg/L).