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中文摘要：
建立了一种亲水有机溶剂（乙醇、正丙醇、四氢呋喃等）气浮浮选（双水相气浮浮选）分离／富集光度法测定污水中痕量四环素（TC）的新型绿色高效分析方法。利用自制的浮选装置，选择四氢呋喃作溶剂、氯化钠作分相剂、NaOH溶液调节酸度，将Ni（Ⅱ）与TC形成的疏水性缔合物浮选至有机相，浮选完毕后经分光光度法分析。该方法的线性范围为2．2×10^-7～7．9×10^-5mol／L，检出限为3．47×10^-8mol／L，回收率为99．59％～100．0％，表观摩尔吸光系数为1．763×10^5L／（mol·cm），适用于污水中痕量四环素的分离／富集及分析测定。
英文摘要：
A novel and green method for separating and enriching trace tetracycline （TC） in sewage by aqueous two-phase gas floatation spectrophotometry was established. The hydrophobic complex composed of Ni （ Ⅱ ） and TC was floated into organic phase by using the home-made floatation equipment, tetrahydrofuran as organic solvent, sodium chloride as separating phase reagent and NaOH solution for regulating acidity. The linear range is 2.2 × 10^-7 to 7.9 × 10^-5 mol/L, the limit of detection is 3.47 × 10^-8 mol/L, the relative recovery is 99.59% to 100% and the apparent molar absorption coefficient is 1. 763 × 10^5 L/（ mol · cm）. The method is applicable to analyze the trace TC in swage.
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