| preliminary analysis of tetracycline residues in marketed pork in hanoi, vietnam. | a cross-sectional survey was designed to investigate the proportion of tetracycline residues in marketed pork in suburb and urban districts in hanoi. a total of 290 raw muscle samples were randomly collected from open markets in these districts. the samples were qualitatively screened for tetracycline residues using the agar inhibition test, and bacillus cereus (atcc 11778) as the reference strain. the inconclusive samples were then analyzed using high-performance liquid chromatography (hplc). t ... | 2006 | 17135565 |