1.2.3光声光谱法①基本原理图1.6光声光谱测试原理Fig.1.6PrincipleofPAspectroscopytesting用一定频率调制的光源(或脉冲光源)照射物质,物质分子吸收一定光能后,由受激态通过非辐射过程跃迁到低能态时,产生同频的声波(光声信号),此现象称为光声效应。不同组分和结构的物质吸收不同波长的光能,因此,当照射于物质的光波...
“The Beer-Lambert law states that there is a linear relationship between the concentration and the absorbance of the solution, which enables the concentration of a solution to be calculated by measuring its absorbance.” Measuring UV Spectroscopy To measure UV Spectroscopy scient...
Ultraviolet-visible (UV-Vis) spectroscopy is a widely used technique in many areas of science ranging from bacterial culturing, drug identification and nucleic acid purity checks and quantitation, to quality control in the beverage industry and chemical research. This article ...