Intrinsic UV absorption spectrometry observed with a liquid core waveguide as a sensor technique for monitoring ozone in water

The Analyst ◽  
2011 ◽  
Vol 136 (16) ◽  
pp. 3335 ◽  
Author(s):  
Trang Le ◽  
Shiquan Tao
Keyword(s):  
Liquid Core ◽  
Absorption Spectrometry ◽  
Uv Absorption ◽  
Liquid Core Waveguide ◽  
Sensor Technique

A LONG PATHLENGTH SPECTROPHOTOMETRIC TEGAFUR DETECTOR USING A LIQUID-CORE WAVEGUIDE

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4046-4050 ◽  
Author(s):  
SHUJI WADA ◽  
TOMOKI KAWATSU ◽  
YUYA HASHIZUME ◽  
TOMOKI YABUTANI ◽  
JUNKO MOTONAKA
Keyword(s):  
Detection System ◽  
Large Diameter ◽  
Liquid Core ◽  
Uv Absorption ◽  
Tube System ◽  
Uv Detector ◽  
Liquid Core Waveguide ◽  
Sensitive Determination ◽  
Uv Visible

A Liquid-Core Waveguide (LCW) detection system for high sensitive determination of tegaful (FT) was developed. In this system the LCW cell was connected to the end of a hollow cathode lump and the other end to a UV spectrometer. A sample solution containing FT was pumped to the LCW cell through a T-shaped connector. A UV absorption of analyte was detected by the UV spectrometer. The configuration of connectors of LCW cell to the light source and the UV detector was designed. Stable and high responses of FT were obtained in a double tube system in which an edge of LCW cell was covered with another tube with large diameter was set in the T-connector. It was found that the UV absorption response of FT obtained in this LCW system depends on the core length and the concentration of FT. The sensitivity of FT obtained by using 65 cm of the LCW cell length was 10-fold higher than that of using 1 cm cell which was often used with a conventional UV-visible detector.

Micromachined Fused Silica Liquid Core Waveguide Capillary Flow Cell

2015 ◽  
Vol 88 (2) ◽  
pp. 1100-1105 ◽  
Author(s):  
K. G. Kraiczek ◽  
J. Mannion ◽  
S. Post ◽  
A. Tsupryk ◽  
V. Raghunathan ◽  
...  
Keyword(s):  
Capillary Flow ◽  
Liquid Core ◽  
Flow Cell ◽  
Fused Silica ◽  
Liquid Core Waveguide

Improving analysis from second-derivative uv-absorption spectrometry

1978 ◽  
Vol 17 (5) ◽  
pp. 724 ◽  
Author(s):  
Alan R. Hawthorne ◽  
John H. Thorngate
Keyword(s):  
Absorption Spectrometry ◽  
Uv Absorption ◽  
Second Derivative

scholarly journals Characteristics of Liquid Core Waveguide Cell Made of Low-refractive-index Polymer and Its Application to the Spectrophotometric Determination of Sulfur in a Steel Sample

2003 ◽  
Vol 89 (9) ◽  
pp. 979-981 ◽  
Author(s):  
Kin-ichi TSUNODA ◽  
Tomonari UMEMURA ◽  
Takashi WATANABE ◽  
Hiromi TAKIGUCHI ◽  
Hitoshi ASANO ◽  
...  
Keyword(s):  
Refractive Index ◽  
Spectrophotometric Determination ◽  
Liquid Core ◽  
Steel Sample ◽  
Liquid Core Waveguide ◽  
Low Refractive Index

Miniaturized liquid core waveguide-based fluorimetric detection cell for capillary separation methods: Application in CE of amino acids

2006 ◽  
Vol 27 (23) ◽  
pp. 4658-4665 ◽  
Author(s):  
Vratislav Kostal ◽  
Marta Zeisbergerova ◽  
Zuzana Hrotekova ◽  
Karel Slais ◽  
Vladislav Kahle
Keyword(s):  
Amino Acids ◽  
Liquid Core ◽  
Fluorimetric Detection ◽  
Detection Cell ◽  
Liquid Core Waveguide ◽  
Capillary Separation

scholarly journals Gas Detection Using Portable Deep-UV Absorption Spectrophotometry: A Review

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5210 ◽  
Author(s):  
Sulaiman Khan ◽  
David Newport ◽  
Stéphane Le Calvé
Keyword(s):  
Gas Sensing ◽  
Low Cost ◽  
Absorption Spectrometry ◽  
Optical Filters ◽  
Uv Absorption ◽  
Uv Photodetectors ◽  
Absorption Spectrophotometry ◽  
Uv Emission ◽  
Selective Approach ◽  
Deep Uv

Several gas molecules of environmental and domestic significance exhibit a strong deep-UV absorption. Therefore, a sensitive and a selective gas detector based on this unique molecular property (i.e., absorption at a specific wavelength) can be developed using deep-UV absorption spectrophotometry. UV absorption spectrometry provides a highly sensitive, reliable, self-referenced, and selective approach for gas sensing. This review article addresses the recent progress in the application of deep-UV absorption for gas sensing owing to its inherent features and tremendous potentials. Applications, advancements, and challenges related to UV emission sources, gas cells, and UV photodetectors are assessed and compared. We present the relevant theoretical aspects and challenges associated with the development of portable sensitive spectrophotometer. Finally, the applications of UV absorption spectrometry for ozone, NO2, SO2, and aromatic organic compounds during the last decades are discussed and compared. A portable UV absorption spectrophotometer can be developed by using LEDs, hollow core waveguides (HCW), and UV photodetectors (i.e., photodiodes). LED provides a portable UV emission source with low power input, low-intensity drifts, low cost, and ease of alignment. It is a quasi-chromatic UV source and covers the absorption band of molecules without optical filters for absorbance measurement of a target analyte. HCWs can be applied as a miniature gas cell for guiding UV radiation for measurement of low gas concentrations. Photodiodes, on the other hand, offer a portable UV photodetector with excellent spectral selectivity with visible rejection, minimal dark current, linearity, and resistance against UV-aging.

scholarly journals Fully Integrated Liquid-Core Waveguide Fluorescence Lifetime Detection Microsystem for DNA Biosensing

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 111944-111953
Author(s):  
Liping Wei ◽  
Hoi Man Leung ◽  
Yi Tian ◽  
Pik Kwan Lo ◽  
Derek Ho
Keyword(s):  
Fluorescence Lifetime ◽  
Liquid Core ◽  
Fully Integrated ◽  
Liquid Core Waveguide ◽  
Fluorescence Lifetime Detection
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