Open AccessTrace analysis of oil-in-water by using visible LED and metal waveguide capillary
Author(s) -
Min Bai,
Hui Huang,
Yan Yu,
Jian Hao,
Ji Zhang,
Jing Fan,
Jun Yan
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.014538
Subject(s) - cuvette , capillary action , materials science , detection limit , optics , emulsion , diesel fuel , waveguide , optoelectronics , chemistry , chromatography , composite material , physics , biochemistry , organic chemistry
Trace analysis of oil-in-water (O/W) has wide applications in life science, industry and environmental monitoring (such as oil spilling). In this paper, with the aid of surfactant, diesel was dispersed in water as O/W emulsion, which can be detected by using visible LED and metal-waveguide-capillary (MWC). Due to the enhancement of optical-path and related light-droplet interaction in MWC, detecting diesel of a concentration as low as 2.14 ng/ml was realized with a 7cm long MWC. The detection limit was improved 125 fold compared with that of commercial spectrophotometer with 1 cm-cuvette. The detecting system features compact, low cost and high sensitivity.