摘要
传统方法测定汞含量时,荧光光谱仪的设定炉温较高、延迟时间较长,影响了测定结果的精密度和准确度。为此,提出建筑用胶粘剂中汞含量测定方法。干燥研磨胶粘剂,放入消解罐中,析出胶粘剂中的汞元素,使其溶解在H2O2和HNO3消解液中,使用减压蒸馏装置进行蒸馏,得到汞含量测定液,设置光谱仪器的测定参数和性能指标,上机测试汞标准使用溶液和测定液,绘制标准工作曲线,记录仪器读数和测定液荧光强度,计算胶粘剂汞含量。进行对比实验,结果表明,设计方法降低了汞含量检出率,扩大了汞含量的浓度测定范围,同时降低了测定值的相对标准偏差,提高了汞离子回收率,表明其精密度和准确度都要优于传统方法,测定结果更加可靠。
When the mercury content is determined by traditional method,the setting furnace temperature of fluorescence spectrometer is higher and the delay time is longer,which affects the precision and accuracy of the determination results.Therefore,the determination method of mercury content in building adhesives is proposed.Dry and grind the adhesive,put it into the digestion tank,separate out the mercury element in the adhesive,make it dissolve in the H2O2 and HNO3 digestion solution,use the vacuum distillation device to distill,get the mercury content determination solution,set the measurement parameters and performance indicators of the spectrometer,test the mercury standard solution and measuring liquid on the computer,draw the standard working curve,record the instrument reading and the fluorescence intensity of the measuring liquid,and the mercury content of adhesive was calculated.A comparative experiment is carried out,and the results show that the design method reduces the detection rate of mercury content,expands the determination range of mercury content,reduces the relative standard deviation of the measured value,and improves the recovery rate of mercury ion.It shows that the precision and accuracy of the design method are better than those of the traditional method,and the determination results are more reliable.
作者
李珊珊
刘国庆
赵鹏
徐晓妮
Li Shanshan;Liu Guoqing;Zhao Peng;Xu Xiaoni(ShangLuo Vocational and Technical College,Shangluo 726000,China;Shangluo Branch of Shaanxi Radio and TV University,Shangluo 726000,China)
出处
《粘接》
CAS
2021年第4期20-24,共5页
Adhesion
基金
陕西省教育厅2020年度一般专项科学研究计划(20JK0619)。
关键词
胶粘剂
汞含量
测定液
原子光谱
标准溶液
adhesive
mercury content
determination solution
atomic spect rum
standard solution
