Quantification of nitrate in simulated high-level liquid waste by Raman spectroscopy.

IF 1.8 4区化学 Q3 CHEMISTRY, ANALYTICAL

Analytical Sciences Pub Date : 2025-07-08 DOI:10.1007/s44211-025-00812-x

Qianci Zhang, Qian Liu, Haiqiao Zhu, Xinyue Liang, Shuping Tan, Zhiyuan Chang, Dingming Li

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Abstract

A rapid analysis technique for determining nitrate in simulated high-level radioactive liquid waste (HLLW) was investigated using Raman spectroscopy. The concentration of nitrate can be quantified by the sharp and strong Raman peak height at 1047 cm^-1 and peak area in the range of 1020-1070 cm^-1 from the spectrum. The maximum Raman peak intensity and peak area of water in the range of 3000-3700 cm^-1 were chosen as the internal standards. The relative intensity I_nitrate/I_water showed good linearity with the concentration of nitrate at the range of 0.10-1.80 mol L^-1, and the fitted curve was y = 0.686x + 0.027 with a linear coefficient of 0.999. Another calibration curve between relative peak area A_nitrate/A_water and the concentration of nitrate, y = 0.0217x - 0.00036 in the range of 0.21-4.34 mol L^-1 was established, and the linear correlation coefficient was 0.999. Sulfate, phosphate, Zr, Cs, Nd and other ions demonstrated negligible interference on the nitrate determination. The presented method has been successfully applied to determinate nitrate in simulated HLLW samples with good recoveries at laboratory.

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用拉曼光谱法定量模拟高放废液中的硝酸盐。

研究了用拉曼光谱法快速测定模拟高放废液中硝酸盐的方法。通过光谱中1047 cm-1的拉曼峰高和1020 ~ 1070 cm-1的峰面积，可以定量测定硝酸盐的浓度。选取3000 ~ 3700 cm-1范围内水的最大拉曼峰强度和峰面积作为内标。硝酸盐浓度在0.10 ~ 1.80 mol L-1范围内与相对强度Initrate/Iwater呈良好的线性关系，拟合曲线为y = 0.686x + 0.027，线性系数为0.999。在0.21 ~ 4.34 mol L-1范围内，建立了硝酸盐相对峰面积与硝酸盐浓度的校准曲线，y = 0.0217x ~ 0.00036，线性相关系数为0.999。硫酸盐、磷酸盐、Zr、Cs、Nd等离子对硝酸盐测定的干扰可忽略不计。该方法已成功地应用于模拟高废液样品中硝酸盐的测定，具有良好的实验室回收率。

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来源期刊

Analytical Sciences 化学-分析化学

CiteScore

2.90

自引率

18.80%

发文量

232

审稿时长

1 months

期刊介绍： Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.