[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.
Study on Determination of Solution Concentration Based on Energy Dispersive X-ray Fluorescence Analysis Method
[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 X-ray 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.
NETL
NSTL
万方数据
维普
