江苏省某市典型饮用水水源中抗生素质量浓度特征

采用固相萃取-高效液相色谱/串联质谱法,分析江苏省某市3个典型地表饮用水水源中5类(14种)抗生素质量浓度特征。结果表明,14种目标抗生素的质量浓度在ND~52.7 ng/L,检出率在0~78%。检出频率较高的为磺胺嘧啶、磺胺甲噁唑、金霉素和氧氟沙星,质量浓度相对较高的为磺胺类,但总体上,地表水饮用水水源中抗生素的质量浓度水平低于国内外其他地表水中相应污染物的质量浓度水平;抗生素质量浓度受季节和水源类型影响,平水期(188.3 ng/L)枯水期(57.2ng/L)丰水期(8.9 ng/L),太湖水源地略高于长江水源地。

Characteristics of concentrations of antibiotics in typical drinking water sources in a city in Jiangsu Province

Solid-phase extraction followed by high-performance liquid chromatography and tandem mass spectrometry were used to analyze the characteristics of the concentrations of five kinds of antibiotics(14 species)in three typical drinking water sources in a city in Jiangsu Province. The results show that the concentrations of the antibiotics ranged from ND to 52. 7 ng/L, and the detectable rate ranged from 0 to 78%. The sulfadiazine, sulfamethoxazole, chlortetracycline, and ofloxacin were detected most frequently, and the sulfonamides were found to have the highest concentrations. On the whole, the concentrations of antibiotics in the water sources of this study were lower than those in surface water reported in other studies in China and elsewhere. Moreover, the concentrations of antibiotics were influenced by the change of seasons and the types of water sources. Generally, the concentrations of antibiotics were ranked in the descending order, as follows: normal season(188. 3 ng/L), dry season(57. 2 ng/L), and wet season(8. 9 ng/L); and they had higher values in the source area of Taihu Lake than in the source area of the Yangtze River.