Research Article

Response Surface Optimization of a Rapid Ultrasound-Assisted Extraction Method for Simultaneous Determination of Tetracycline Antibiotics in Manure

Figure 4

HPLC chromatograms obtained by UV detection (355 nm) of (a) standards of 1.0 μg/mL TCs in pure water, (b) blank manure sample extract, and (c) blank manure spiked with 50 μg/g TCs.
(a)
(b)
(c)