摘要
测量了低折射率液体（ｎ＞１．３４６）和水溶液液芯光纤的导光特性和光谱特性．研究了液芯光纤长光路法在７０％乙醇－水溶液体系和５０％二氧六环－水溶液体系中测定Ｃｒ（Ⅵ）、Ｃｕ（Ⅱ）的方法．液芯光纤长１１０ｃｍ时，测定Ｃｒ、Ｃｕ的灵敏度分别为０．０５２、０．０１７ｎｇ·ｍＬ－１；线性范围０～２５、０～２４ｎｇ／ｍＬ；ＲＳＤ值为１．０％～４．８％．对国标ＧＳＢＥ５０００９－８８样品和明胶中铬的测量值与标准值或ＡＡＳ测量值吻合，回收率为９４％～１０２％．
This paper presents the transmission characteristics and spectrum for liquid-core optical fiber filled with low refractive index liquids(n>1.346)and aqueous solutions.The methods are studied for the determination of Cr(Ⅵ),Cu(Ⅱ) in aqueous solutions of about 70% alcohol and 50% dioxane.With the 110 cm liquid-core optical fiber in length,the sensitivities(1/ng·mL￣(-1))of Cr(Ⅵ), Cu(Ⅱ)are 0. 052 and 0.017 respectively;the linear ranges are 0～25,0～24 ng/mL with RSD being 1.0%～4.8%.The Cr in the animal gum and national standard are determined with recoveries of 94%～102%.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第3期377-380,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
液芯光纤
水溶液
铬
铜
光度法
Liquid-core optical fiber,Aqueous solution, Cr(Ⅵ),Cu(Ⅱ)
