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提出了利用溶剂浮选富集ＤＤＴＣ－Ｃｕ（Ⅱ）体系测定水样中痕量铜的方法（ＤＤＴＣ为二乙胺二硫代甲酸钠）。质量浓度的检出限为０．０５ｎｇ·ｍＬ－１，线性范围为０．０～６．０ｎｇ·ｍＬ－１，测定含Ｃｕ（Ⅱ）４．０ｎｇ·ｍＬ－１的样品，相对标准偏差为０．８５％，已用于天然水中Ｃｕ（Ⅱ）的测定。
A method for the determination of trace copper in water samples by DDTC-Cu (II) enrichment by solvent flotation was proposed (DDTC is diethylamine sodium dithiocarboxylate). The detection limit of mass concentration was 0.05ng · mL-1, the linear range was 0.0 ~ 6.0ng · mL-1, the sample containing 4.0ng · mL-1 of Cu (Ⅱ) was determined with the relative standard deviation of 0.85%, has been used for determination of Cu (Ⅱ) in natural water.