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首页> 外文会议>International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Study on the Determination of Trace Lead by Spectrophotometry after Flotation Separation with Ternary Association Complex System
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Study on the Determination of Trace Lead by Spectrophotometry after Flotation Separation with Ternary Association Complex System

机译：三元关联复合体系浮选分离后分光光度法测定痕量铅的研究

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The paper presents a novel method for the flotation separation of Pb2+ with ternary association complex system prior to the determination by spectrophotometry. The effects of different parameters, such as the dosages of KI and hexa decyl trim ethyl ammonium bromide (CTMAB), various salts and acidity etc. on the flotation yield of Pb 2+ have been investigated to select the experimental conditions. The possible flotation mechanism of Pb2+ was discussed. The results showed that by controlling pH1.0, in the presence of 1.0g NaNO3, when the dosage of 0.1 mol¡¤L-1 KI solution was 1.00 mL and 0.01 mol¡¤L-1CTMAB solution was 0.50 mL respectively, the water-insoluble ternary association complex of (CTMAB)2(PbI4) which produced by Pb2+ and I-, CTMAB cation (CTMAB+) floated above water phase and liquid-solid phases were formed with clear interface, while Fe2+, Co2+, Ni2+, Zn2+, Mn2+ and Al3+ could not be floated, so Pb2+ was floated quantitatively at pH1.0. Thereby, the quantitative separation of Pb2+ from the above metal ions could be achieved. A new method of determination of trace lead by flotation separation was established. The proposed method has been successfully applied to the determination of Pb2+ in the sample of synthetic water and the flotation yield was96.3%~106.6%.
机译：本文在分光光度法测定之前，呈现了PB2 +与三元关联复合体系的浮选分离的新方法。已经研究了不同参数的影响，例如Ki和六核聚乙烯溴化物（CTMAB），各种盐和酸度等的剂量对PB 2+的浮选产率进行了研究，以选择实验条件。讨论了PB2 +的可能浮选机制。结果表明，通过控制pH1.0，在1.0g纳米3的存在下，当0.1mol〜1ki-1ki溶液的剂量为1.00ml和0.01mol - 1ctmab溶液，分别为0.50mL水通过Pb2 +和I-，CTMAB阳离子（CTMAB +）产生的（CTMAB）2（PBI4）的溶于溶液和液体固相的溶液阳离子（CTMAB +）的含量络合，用透明界面形成，而Fe2 +，CO 2 +，Ni2 +，Zn2 +， Mn2 +和Al3 +无法漂浮，因此Pb2 +定量在pH1.0定量浮动。由此，可以实现Pb2 +从上述金属离子的定量分离。建立了通过浮选分离测定痕量铅的新方法。已提出的方法已成功应用于合成水样品中Pb2 +的测定，浮选产率为96.3％〜106.6％。

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