在模拟的高水平液体废物中用拉曼光谱测量酸盐的量化
Qianci Zhang1, Qian Liu1, Haiqiao Zhu1
1Department of Radiochemistry, China Institute of Atomic Energy, Beijing, 102413, China.
概括
拉曼光谱为放射性废物中酸盐的量化提供了一种快速的方法. 这种技术使用水作为内部标准,显示出高线性和其他离子的最小干扰.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学方法.
- 核废物管理 核废物管理
背景情况:
- 精确的酸盐测定对于高水平放射性液体废物 (HLLW) 的管理至关重要.
- 传统的酸盐分析方法可能耗时且复杂.
- 开发快速可靠的分析技术对于核废物处理至关重要.
研究的目的:
- 研究拉曼光谱作为一种快速分析技术,用于模拟HLLW中酸盐的确定.
- 为了建立拉曼光谱特征和酸盐度之间的定量关系.
- 评估在HLLW中发现的常见离子对酸盐测量的干扰效应.
主要方法:
- 利用拉曼光谱分析模拟的高水平放射性液体废物 (HLLW).
- 量化酸盐度使用拉曼峰高度在1047厘米-1和峰值面积 (1020-1070厘米-1).
- 使用水的拉曼峰 (3000-3700厘米−1) 作为强度和面积比的内部标准.
主要成果:
- 在相对拉曼强度 (I酸盐/I水) 和酸盐度 (0.10-1.80 mol L−1) 之间建立了良好的线性,R2 = 0.999.
- 开发了一个相对峰值面积 (A酸盐/A水) 的校准曲线,显示在0.21-4.34mol L-1范围内的线性,R2 = 0.999.
- 证明硫酸盐,酸盐,Zr,Cs和Nd离子的干扰是微不足道的.
结论:
- 拉曼光谱为模拟HLLW中酸盐的确定提供了快速而准确的方法.
- 该方法表现出极好的线性和最小的干扰,使其适合实际应用.
- 在模拟的HLLW样本中成功应用,并具有良好的实验室回收,验证了该技术.
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