地表水成分对离子色谱法测定锕系元素的潜在影响。

Potential effects of surface water components on actinide determinations conducted by ion chromatography.

作者信息

Reboul S H, Fjeld R A

机构信息

Department of Environmental Systems Engineering, Clemson University, SC 29634.

出版信息

Health Phys. 1995 Apr;68(4):585-9. doi: 10.1097/00004032-199504000-00018.

DOI:10.1097/00004032-199504000-00018

PMID:7883573

Abstract

An elution program for separating actinides (thorium, uranium, neptunium, plutonium, americium, and curium) on low hydrophobicity ion exchange columns was evaluated for solutions spiked with actinides and common surface water components. Potential interferences from dissolved ions (Na+, K+, Ca2+, Cl-, and SO(4)2-), humic acid, and radium were investigated. Sulfate levels greater than 0.25 mumol interfered with separation of americium, curium, and plutonium. Humic acid levels above 100 micrograms produced distinct widening of actinide peaks and reduced actinide recoveries. These interferences limit the range of useful sample volumes and create a need for sample pretreatment procedures. No interferences were produced by 0.025 to 2.5 mumol Ca2+, 0.045 to 4.5 mumol Na+, 0.015 to 1.5 mumol K+, and 0.025 to 4.5 mumol Cl-. In the absence of interferences, the program effectively separated radium from the actinides.

摘要

针对添加了锕系元素和常见地表水成分的溶液，评估了一种用于在低疏水性离子交换柱上分离锕系元素（钍、铀、镎、钚、镅和锔）的洗脱程序。研究了溶解离子（Na⁺、K⁺、Ca²⁺、Cl⁻和SO₄²⁻）、腐殖酸和镭的潜在干扰。硫酸盐含量大于0.25 μmol会干扰镅、锔和钚的分离。腐殖酸含量高于100微克会使锕系元素峰明显变宽并降低锕系元素回收率。这些干扰限制了有用样品体积的范围，并产生了对样品预处理程序的需求。0.025至2.5 μmol的Ca²⁺、0.045至4.5 μmol的Na⁺、0.015至1.5 μmol的K⁺和0.025至4.5 μmol的Cl⁻未产生干扰。在无干扰的情况下，该程序有效地将镭与锕系元素分离。