a trace analysis of oxytetracycline and tetracycline residues in pasteurized milk supplied in tehran: a one-year study (april 2011-march 2012)

نویسندگان

ali rasooli

zahra amani

alireza bahonar

gholamreza shams

zohreh abdolmaki

چکیده

background: tetracyclines (tcs) are broad-spectrumantibiotics that are widely used in veterinary medicine. thepresence of tcs residues in milk is a public health concern allover the world. objectives:this study aimed to determine tcsresiduals in pasteurized milk marketed by some dairy companiesin tehran from april 2011 to march 2012. methods: 432pasteurized milk samples were purchased from supermarketssupplying the milk products of 12 major dairy companies intehran (3 samples from each company every month), and theywere stored at -20 0c until analysis. oxytetracycline (otc) andtetracycline (tc) residues in each sample were extracted by aliquid - liquid phase procedure and quantitated using a highperformance liquid chromatographic (hplc) method. chromatographicconditions included a mobile phase as oxalic acidbuffer- acetonitril (80: 20) with a flow rate of 1ml/min and uvdetectionat 355 nm. results: tcs residuals in most milksamples were lower than 100 ppb, maximum residue level(mrl); however, in seven samples (1.62%) the total residues ofotc and tc were more than mrl. in the latter milk samples, themedian total tcs residue was 625 ppb, ranging between 274 and1270 ppb. conclusions: because of the presence of tcresidues above the mrl level in a limited number of milksamples, it is concluded that more studies and supervision ofhealth authorities are needed in this field.

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A trace analysis of oxytetracycline and tetracycline residues in pasteurized milk supplied in Tehran: a one-year study (April 2011-March 2012)

BACKGROUND: Tetracyclines (TCs) are broad-spectrumantibiotics that are widely used in veterinary medicine. Thepresence of TCs residues in milk is a public health concern allover the world. OBJECTIVES:This study aimed to determine TCsresiduals in pasteurized milk marketed by some dairy companiesin Tehran from April 2011 to March 2012. METHODS: 432pasteurized milk samples were purchased from supe...

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ACROSS-SECTIONAL STUDY ON OXYTETRACYCLINE AND TETRACYCLINE RESIDUES IN PASTEURIZED MILK SUPPLIED IN TEHRAN BY AN HPLC METHOD

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across-sectional study on oxytetracycline and tetracycline residues in pasteurized milk supplied in tehran by an hplc method

tetracyclines (tcs) are broad-spectrum antibiotics that are used widely in veterinary medicine. the present study was carried out to trace the residues of oxytetracycline (otc) and tetracycline (tc) in pasteurized milk that is marketed in tehran with the use of a high performance liquid chromatography (hplc). ninety milk samples were collected during five sequential days from the products of si...

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across-sectional study on oxytetracycline and tetracycline residues in pasteurized milk supplied in tehran by an hplc method

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عنوان ژورنال:
iranian journal of veterinary medicine

ناشر: دانشگاه تهران

ISSN 2251-8894

دوره 8

شماره 2 2014

کلمات کلیدی

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