Chemical assessment of mycotoxin contaminants and veterinary residues in Costa Rican animal feed

Food Safety and Risk

Table 3 Evaluation of commercial monensin standards used routinely in feed mills

Sample	Guaranteed analysis, g/100 g	Experimental result^a, Concentration ± U_x/x g/100 g	Variation, g/100 g (percentile^b)
1	20	17.04 ± 0.98	−2.96 (14.8)
2	20	22.26 ± 1.28	2.26 (11.3)
3	7	8.39 ± 0.48	1.39 (19.9)
4	0.2	0.15 ± 0.04	−0.05 (21.1)

^aMonensin standard (M5273 lot 117 K5006) used for quantification, 91% purity as reported by the manufacturer. Work solution concentration, ca. 10 mg L⁻¹
^bCalculated as the subtraction between the experimental value and guaranteed value divided by the guaranteed value

ISSN: 2731-9245