用金络合离子交换膜流动注射电位法测定主要离子和干扰离子
Flow injection potentiometry of primary and interfering ion with a gold complex ion-exchange membrane.
作者信息
Sánchez-Pedreño C, Ortuño J A, Hernández J
机构信息
Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30071 Murcia, Spain.
出版信息
Talanta. 2001 Aug 3;55(1):201-7.
A gold(I) organic complex in the perchlorate form was incorporated in plasticized poly(vinyl chloride) (PVC) membranes and the potentiometric response towards perchlorate (primary ion) and permanganate (interfering ion) was studied. Membranes with 2:1 and 1:2 (w/w) plasticizer to PVC ratio were selected for the determination of primary and interfering ions, respectively. In the selected flow injection conditions, a linear relationship between peak height and log c were obtained between 1x10(-2) and 2x10(-5) mol l(-1) perchlorate and 1x10(-3)-1x10(-5) mol l(-1) permanganate. Good reproducibilities and excellent selectivity coefficients towards many common ions were obtained. The methods proposed were applied satisfactorily to the determination of perchlorate in water and of permanganate in pharmaceutical preparations. Permanganate can be directly determined even in the presence of a high amount of manganese dioxide.
将高氯酸盐形式的金（I）有机配合物掺入增塑聚氯乙烯（PVC）膜中，研究了其对高氯酸盐（主离子）和高锰酸盐（干扰离子）的电位响应。分别选择增塑剂与PVC比例为2:1和1:2（w/w）的膜来测定主离子和干扰离子。在选定的流动注射条件下，高氯酸盐浓度在1×10⁻²至2×10⁻⁵ mol·L⁻¹之间以及高锰酸盐浓度在1×10⁻³至1×10⁻⁵ mol·L⁻¹之间时，峰高与log c呈线性关系。该方法对许多常见离子具有良好的重现性和出色的选择性系数。所提出的方法成功应用于水中高氯酸盐的测定以及药物制剂中高锰酸盐的测定。即使存在大量二氧化锰，也能直接测定高锰酸盐。
Zotero 插件