【摘要】 本文研究了在ＣＴＭＡＢ存在下，应用苯基萤光酮分光光度法测定微量锡的条件。在Ｃ（Ｈ＿２ＳＯ＿４）／（ｍｏｌ·Ｌ￣（－１））＝０．２一０；８的硫酸介质中，锡与苯基萤光酮反应生成有色络合物。该络合物的最大吸收λ＿（ｍａｘ）＝５１６ｎｎ，表观摩尔吸光系数：ε＿（５１６）＝１．４×１０￣５Ｌ·ｍｏｌ￣（－１）ｃｍ￣（－１），锡（Ⅳ）ρｓｎ（Ⅳ）／（μｇ·ｍｌ￣（－１））在０一０．８范围内符合比尔定律。络合物可以稳定２４ｈ以上。该法灵敏度高，操作简便，可用于测定岩矿样品中的微量锡。更多还原

【Abstract】 In this paper the condition of spectrophotometric determination of micro tin with phenylfluorone（PF）m the presenc cetyltrine-thylammonium bromid（CTMAB）have been studied.Tin)reacts with PF inC（H₂SO₄）=02～0.8 mol·L￣（-1） of sulfuric acid medium forming a colored complex。The maxium absorption of the com-plex is at 516 nm。 It’S apparent molar extinction coefficient is 1.4×10￣5. Beer’ S law is obeyed for tin in the range of 0一0.8μg/ml.The complex can stabilize for more than 24 h.The method is highly-sensitivity and simple. This method can be used to determine micro tin in the rocks and minerals。更多还原