摘要
[目的]溶液浓度是一项重要的计量参数,溶液浓度测量广泛应用于工业和科学研究等领域。为了快速、准确地测量溶液浓度,提出了能量色散X荧光分析方法。[方法]将配制好的10种三氯化铁溶液作为标准溶液,利用能量色散X荧光分析方法测量出溶液中Fe的特征X射线强度,得到三氯化铁溶液的标准曲线,利用该标准曲线,对5组三氯化铁溶液进行了测量。[结果]三氯化铁的浓度与溶液中Fe元素的特征X射线强度成较好的线性关系,对5组三氯化铁待测溶液浓度进行数据分析,结果表明实验测得最大误差为1.74%,其他误差都在1%以内,小于传统的折射率测量误差(大约3%)。另外,为了进一步分析其精确度,分别计算了浓度梯度差。由梯度差可知,最大梯度差为3.71%,绝大多数在1%以内,最小为0。[结论]该方法具有较高的精确度,且出数据快,随测随得,为快速、准确测量溶液浓度提供参考。
[Purpose]Solution concentration is an important metrological parameter,and its determination is widely used in industries and scientific researches.To quickly and accurately determine solution concentration,we propose an energy dispersive X-ray fluorescence analysis method in this paper.[Method]Ten prepared ferric chloride solutions were used as standard solutions,the characteristic X-ray intensity of Fe in the solution were determined using energy dispersive Xray fluorescence analysis,and the standard curve of the ferric chloride solution was obtained.Five sets of ferric chloride solutions were determined using this standard curve.[Result]The experimental results indicate that the concentrations of ferric chloride have a good linear relationship with the characteristic X-ray intensity of Fe determined by energy disper⁃sive X-ray fluorescence analysis method.And the concentrations of ferric chloride of five unknown solutions are experi⁃mentally determined,the data show that the maximum error of the concentration of ferric chloride solutions is 1.74%,and the other errors are within 1%,which is less than the traditional refractive index measurement(about 3%).In addi⁃tion,to further analyse the accuracy of this method,concentration gradient differences are calculated separately.Accord⁃ing to the gradient difference,the maximum gradient difference is 3.71%,with the majority being within 1%and the minimum being 0.[Conclusion]This method has high accuracy,and the data output is fast and can be obtained as needed.Therefore,this method can provide a reference for rapid and accurate determination of solution concentration.
作者
张艳丽
王城
陈本富
张宇凡
周星宇
吴鑫
ZHANG Yanli;WANG Cheng;CHEN Benfu;ZHANG Yufan;ZHOU Xingyu(School of Science,Xichang University,Xichang 615013,Sichuan,China)
出处
《西昌学院学报（自然科学版）》
2024年第1期65-71,共7页
Journal of Xichang University(Natural Science Edition)
基金
西昌学院博士启动项目(015/117281540)。
关键词
溶液
浓度
X射线管
特征X射线
能量色散X荧光分析法
solution
concentration
X-ray tube
characteristic X-ray
energy dispersive X-ray fluorescence analysis
