为了对液体样品进行长程吸收率测量 ,必须将发光探测器盒做成光纤或波导 ,否则噪声会太大。假如将盒做为波导的液芯 ,它一定要用比周围材料的折射系数低的材料做。以往系统采用的材料为在玻璃管中装二硫化碳 ,或在氟化乙烯 -丙烯共聚物中装乙醇。现在德克萨斯技术大学报告 ,用 In order to measure long-range absorbance of liquid samples, the light-emitting detector box must be made of fiber or waveguide, otherwise the noise will be too large. If the box is used as a waveguide core, it must be made of a material of lower refractive index than the surrounding material. In the past, the materials used in the system were carbon disulfide in a glass tube or ethanol in a fluorinated ethylene-propylene copolymer. Now Texas Tech University report, use