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Detection of 36 antibiotics in coastal waters using high performance liquid chromatography-tandem mass spectrometry 总被引：2，自引：0，他引：2
Among pharmaceuticals and personal care products released into the aquatic environment, antibiotics are of particular concern, because of their ubiquity and health effects. Although scientists have recently paid more attention to the threat of antibiotics to coastal ecosystems, researchers have often focused on relatively few antibiotics, because of the absence of suitable analytical methods. We have therefore developed a method for the rapid detection of 36 antibiotic residues in coastal waters, including tetracyclines (TCs), sulfanilamides (SAs), and quinolones (QLs). The method consists of solid-phase extraction (SPE) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis, using electrospray ionization (ESI) in positive mode. The SPE was performed with Oasis HLB and Oasis MCX cartridges. Chromatographic separation on a C18 column was achieved using a binary eluent containing methanol and water with 0.1% formic acid. Typical recoveries of the analytes ranged from 67.4% to 109.3% at a fortification level of 100 ng/L. The precision of the method, calculated as relative standard deviation (RSD), was below 14.6% for all the compounds. The limits of detection (LODs) varied from 0.45 pg to 7.97 pg. The method was applied to determine the target analytes in coastal waters of the Yellow Sea in Liaoning, China. Among the tested antibiotics, 31 were found in coastal waters, with their concentrations between the LOD and 212.5 ng/L. These data indicate that this method is valid for analysis of antibiotics in coastal waters. The study first reports such a large number of antibiotics along the Yellow Sea coast of Liaoning, and should facilitate future comprehensive evaluation of antibiotics in coastal ecosystems. 相似文献
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通过对连云港徐圩新区土壤中盐渍土八大易溶盐盐度、类型及空间分布的分析得出,该地区盐渍土为典型的氯盐渍土,研究区50m以浅的深度范围土壤类型从上至下依次由超盐渍土—强盐渍土—中盐渍土过渡;土壤中易溶盐盐度、质量浓度、腐蚀性特征均在15m以浅的范围随深度的加深呈降低趋势;地下水中易溶盐各项指标普遍高于钻孔土壤样品,显示较强的腐蚀性。结果表明,研究区长期以盐场及海水型地下水对该地区土壤的影响较为显著。通过与工程腐蚀评价标准的比对,该区土壤中氯盐在近地表15m以浅的范围内质量浓度较高,达到对钢筋、管线的强烈腐蚀等级,在今后的沿海开发工程中需引以重视。 相似文献
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基于南通近海(洋口港—吕四)潮滩特点布设潮滩断面并采集表层沉积物,根据样品汞、镉、铅、砷、铬等7种重金属元素含量测试结果,分析研究区沿海潮滩表层沉积物主要重金属元素含量特征,并与江苏其他滨岸地区潮滩沉积物的重金属含量进行对比,初步探讨2009—2012年南通沿海滩涂表层沉积物重金属含量变化与元素的相关性。采用潜在生态危害指数法评价南通近海潮滩表层沉积物中7种重金属元素的潜在生态危害系数及潜在生态风险。南通潮滩表层沉积物重金属含量分布均匀,且低于江苏省苏北其他地区沿海潮滩的沉积物含量。7种重金属元素的相关分析表明,Cu与Pb、Zn具有较好的相关性,Pb与Cd、Hg的相关性最差。潜在生态危害指数法评价表明,南通近岸潮滩表层沉积物7种重金属潜在生态危害系数均属低生态危害范畴,近岸海域(洋口港—吕四段)潮滩表层沉积物环境质量总体较好。 相似文献
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