Determination of 9 kinds of macrolide and lincosamide drug residues in livestock and poultry meat-linear range and lower limit of determination

6.
2.
1.
8 Linearity range and lower limit of determination

Prepare mixed standard solutions with concentrations of 1.
0 ng/mL, 2.
0 ng/mL, 5.
0 ng/mL, 10.
0 ng/mL, and 50.
0 ng/mL, and perform determination under selected conditions.
The injection volume is 50 uL.
High is plotted against the concentration of each tested component in the standard solution
.

Table 6-11 Linear equations and correlation coefficients of 9 antibiotics

Under the operating conditions of this method, when 9 antibiotics were added at a level of 1.

6.
2.
1.
9 Method recovery and precision

Use beef samples that do not contain 9 kinds of antibiotics for addition recovery and precision experiments.
After adding 1.
0μg/kg, 2.
0μg/kg, 5.
0μg/kg, 10.
0μg/kg different concentration standards to the sample, shake it well to make the standard sample Fully absorb, and then perform extraction, purification, and determination according to this method.
The recovery rate and precision are shown in Table 6-12
.

Table 6-12 The recovery rate and precision experimental data of 9 antibiotics (n=10)