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Tai Y.,Jinan University | Tai Y.,CAS South China Botanical Garden | Mo C.,Jinan University | Wu X.,Jinan University | And 4 more authors.
Huanjing Kexue Xuebao/Acta Scientiae Circumstantiae | Year: 2011

Although they are an emerging class of pollutants, antibiotics in regional agricultural soils are rarely studied. We investigated the concentration and distribution of four quinolone antibiotics(QNs) in the soils from 24 typical vegetable fields in 18 towns of Dongguan city using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). The results showed that there were very high detection rates (above 90%) observed for four compounds, dominated by ciprofloxacin (CIP, average concentration of 24.93μg·kg-1) and enrofloxacin (ENR, average concentration of 19.85μg·kg-1). The total concentrations of the four compounds ranged from 0 (below LOQ) to 554.1μg·kg-1 and focused between 10 and 50μg·kg-1, with an average of 50.23μg·kg-1. The concentration and constituents of the quinolone compounds in the soils from different vegetable fields were various, consisting mainly of four models, i. e. the first model dominated by both ENR and CIP, the second model dominated by CIP alone, the third model dominated with both NOR and CIP, and the last model dominated with single LOM. However, the concentrations of QNs in different soil samples from the same vegetable fields were in general comparative. While the concentration and constitute of quinolone compounds in soils grown different variety or genotype of vegetable varied to some extent. It is therefore concluded that the concentrations of quinolone antibiotics in soils from vegetable fields of Dongguan city were generally lower, But some of them were above the trigger value of ecological risk(100μg·kg-1). Source


Tai Y.-P.,Jinan University | Tai Y.-P.,CAS South China Botanical Garden | Mo C.-H.,Jinan University | Li Y.-W.,Jinan University | And 3 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2011

The concentration and distribution of four tetracycline antibiotics (TCs) including tetracycline(TC), oxytetracycline (OTC), chlortetracycline (CTC) and deoxytetracycline (DC) in soils from 24 typical vegetable fields in 18 towns of Dongguan city using high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was discussed. The total concentrations of four tetracycline antibiotics (∑TCs) ranged from 0 (below LOQ) to 97.04 μg/kg, which predominated with under 10 μg/kg and averaged at 13.42 μg/kg. The concentrations of four tetracycline compounds detected in 59~89% of the samples ranged from 0 (below LOQ) to 75.29 μg/kg which falls mostly bellow 10 μg/kg. Oxytetracycline which averaged at 6.51 μg/kg was dominant compound, followed by chlortetracycline and deoxytetracycline which averaged at 2.95 μg/kg and 2.92 μg/kg respectively. The concentration and constitute of tetracycline compounds in soils from different vegetable fields varied greatly, consisting mainly of four models, i.e. the first one dominated with oxytetracycline, the second one dominated with chlortetracycline, the third one dominated with deoxytetracycline, and the last one dominated with both oxytetracycline and deoxytetracycline. However, the concentrations and constitute of tetracycline compounds in soils grown different cultivars within the same vegetable fields varied weakly. The concentrations of tetracycline antibiotics in soils from vegetable fields of Dongguan city were generally lower and less ecotoxic risk for soil ecosystem. But it should not be ignored as to combined toxic effect and resistance of various compounds. Source


Wu X.-L.,Jinan University | Mo C.-H.,Jinan University | Yan Q.-Y.,Jinan University | Jiang Y.-N.,Jinan University | And 5 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2013

Quinolone antibiotics in vegetables from Dongguan vegetable farms were determined using ultra high performance liquid chromatography-tandem mass spectrometry and the health risk of their exposure to human body by diet pathway was assessed. The results showed that quinolone antibiotics in the vegetable samples were frequently detected. Norfloxacin and ciprofloxacin were main compounds, followed by enrofolxacin, and the three antibiotics were detected in more than 80% of the samples. The highest content of individual compounds was more than 100 μg/kg (D. W.) and average contents was around 20 μg/kg (D. W.). The composition and concentration of quinolone antibiotics in various farms of vegetables and different kinds of vegetables varied greatly, with the order of leafy vegetable (49.87 μg/kg)> rhizome vegetable (44.81 μg/kg)> melon-fruit vegetable (11.21 μg/kg). The intake dose of quinolone antibiotics via the consumption of vegetable from Dongguan farms was lower than acceptable daily intake (ADI), suggesting a lower health risk. Source


Li Y.-W.,Jinan University | Li Y.-W.,Key Laboratory of Water Soil Toxic Pollutants Control and Bioremediation | Zhang Y.,Jinan University | Zhang Y.,Key Laboratory of Water Soil Toxic Pollutants Control and Bioremediation | And 8 more authors.
Huanjing Kexue/Environmental Science | Year: 2010

Quinolone antibiotics(QNs) including norfloxacin(NOR), enrofolxacin(ENR), ciprofloxacin(CIP) and lomefloxacin(LOM) in vegetable samples collected from Guangzhou were determined by high performance liquid chromatography(HPLC) coupled with fluorescent detector(FLD). The detected frequency of QNs was 96% in vegetables. The total concentration of quinolones(∑QNs) detected in vegetable ranged from 1.0 μg/kg to 1683.1 μg/kg(F. W.). Leafy vegetable topped the content of quinolones among the three types of vegetables, followed by the melon-fruit vegetable and rhizome vegetable. The detected frequency of the four quinolone antibiotics ranked as NOR > CIP > LOM > ENR. Except ENR, concentrations of CIP, NOR, LOM and ∑QNs in pollution-free vegetable, green vegetable and organic vegetable were higher than those in routine cultivated vegetables. The maximum contribution to ADI value(calculated by the sum of CIP and ENR) is estimated up to 41.5% and 83% for adults and children respectively via consumption of vegetables. Source


Wu X.-L.,Jinan University | Xiang L.,Jinan University | Mo C.-H.,Jinan University | Jiang Y.-N.,Jinan University | And 5 more authors.
Huanjing Kexue/Environmental Science | Year: 2013

Sixteen typical antibiotics including four tetracyclines, four quinolones, and eight sulfonamides in vegetables from manure-amended farm were determined using the ultra high performance liquid chromatography-tandem mass spectrometry and their health risks to human via the diet pathway was assessed. Most antibiotics were frequently detected in vegetable samples, with the detection rate from 11% to 90%. Concentrations of a single compound were mainly less than 5 μg·kg-1 (D. W.), with the maximum of 23.88 μg·kg-1 and the average of 0.91 μg·kg-1, respectively. Norfloxacin, ciprofloxacin, sulfamehtaoid and sulfadiazine were the dominant compounds. At least one antibiotic was detected in a single vegetable samples, and even up to ten antibiotics. The concentration of quinolones in underground parts was higher than those in aboveground parts. Intake dose of antibiotics via the consumption of the detected vegetables was lower than ADI, suggesting a lower health risk. But combination toxicity and resistance of antibiotics should not be ignored. Source

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