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提出一种测定痕量锡的新方法。该方法在590nm处的表观摩尔吸光系数为1．39×107L．mol-1cm-1，锡浓度在0-4.0μg／L范围内服从比耳定律，回归方程ΔA=0．4023＋0．023Csn（Ⅳ）（μg／L），r=0.9996，检出限为1，0×10-12g／ml。此方法用于水样中锡的测定，结果满意。
A new method for the determination of trace tin was proposed. The apparent molar absorptivity of this method at 590 nm was 1.39 × 10 7 L. mol-1cm-1, the Beer’s law was obeyed in the range of 0-4.0μg / L, the regression equation was ΔA = 0.4023 + 0.023Csn (Ⅳ) 0 × 10-12g / ml. This method is used for the determination of tin in water samples with satisfactory results.