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A rapid and simple high-performance liquid chromatography-UV method was developed for the separation and quantification of salbutamol, ractopamine, and clenbuterol in pork. A mixture of acetonitrile-formic acid-ammonium acetate was used as the mobile phase to separate three β-agonists on a C18 column with gradient. The effects of the addition of formic acid and ammonium acetate to mobile phases on the separation of β-agonists were investigated. These additives can greatly improve the resolution and sensitivity. Under the optimized chromatographic condition, this separation does not need extra sample preparation. Complete baseline separation of three β-agonists was achieved in &lt; 20 minutes; the linear range is 0.2-50 μg/L with a correlation coefficient R 2 value of &gt; 0.99. Excellent method reproducibility was found by intra- and interday precisions with a relative standard deviation of &lt; 3%. The detection limit (S/N = 3) was found to be &lt;0.05 μg/L; this method can be used for routine screening of the β-agonist residues in foods of animal origin before being identified by confirmatory methods.

Rapid screening of toxic salbutamol, ractopamine, and clenbuterol in pork sample by high-performance liquid chromatography—UV method