Table 3.

Contents of veterinary drugs in chilled pork samples from three different sources

Source	Oxytetracycline (μg/kg)	Chlortetracycline (μg/kg)	Tetracycline (μg/kg)	Sulfonamides (μg/kg)
Wet market	ND (<50)	ND (<50)	ND (<50)	ND (<0.5)
Supermarket	ND (<50)	ND (<50)	ND (<50)	ND (<0.5)
Online market	ND (<50)	ND (<50)	ND (<50)	ND (<0.5)
Limit	≤100	≤100	≤100	≤100
Source	Clenbuterol (μg/kg)	Ractopamine (μg/kg)	Salbutamol (μg/kg)
Wet market	ND (<0.5)	ND (<0.5)	ND (<0.5)
Supermarket	ND (<0.5)	ND (<0.5)	ND (<0.5)
Online market	ND (<0.5)	ND (<0.5)	ND (<0.5)
Limit	Negative	Negative	Negative

ND: not detected. The measurements of chilled pork samples were based on wet weight