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离子液体气浮溶剂浮选分光光度法测定环境水样中的痕量镉

CUI Yun-cheng,ZHANG Li-ying,SUN Meng-meng,WANG Zhen-huan,JIANG Da-yu

Jilin Normal University Journal(Natural Science Edition)（2012）

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Abstract
以等体积的离子液体1-丁基-3-甲基咪唑六氟磷酸盐([Bmim]PF6)和乙酸乙酯(EA)的混合溶剂为浮选剂,以抗坏血酸为掩蔽剂,建立了离子液体气浮溶剂浮选分光光度法测定环境水样中痕量镉的新方法.在pH4.8的溶液中,浮选时间为10 min、氮气流速为45 mL.min-1时,缔合物的最大吸收波长为553 nm.镉的线性范围为0.28-56.0μg.L-1,线性回归方程为A=0.2147+1.7602c(μg.L-1),表观摩尔吸光率为2.53×105L.mol-1.cm-1,检出限为0.15μg.L-1,用于环境天然水中痕量镉的测定.
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Key words
spectrophotometry,gas-solvent flotation,trace cadmium(Ⅱ),ionic liquid
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