scholarly journals Remote Measurements of Actinide Species in Aqueous Solutions Using an Optical Fiber Photoacoustic Spectrometer

1990 ◽  
Vol 212 ◽  
Author(s):  
Richard E. Russo ◽  
Piotr B. Robouch ◽  
Robert J. Silva
Keyword(s):  
Optical Fiber ◽  
Aqueous Solutions ◽  
Photoacoustic Spectrometer ◽  
Remote Measurements ◽  
Absorption Measurements

ABSTRACTA photoacoustic spectrometer, equipped with an 85 meter optical fiber, was used to perform absorption measurements of lanthanide and actinide samples, located in a glovebox. The spectrometer was tested using aqueous solutions of praseodymium and americium ions; the sensitivity for remote measurements was found to be similar to that achieved in the laboratory without the fiber.

scholarly journals Development of an Aptamer Based Luminescent Optical Fiber Sensor for the Continuous Monitoring of Hg2+ in Aqueous Media

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2372 ◽  
Author(s):  
Nerea De Acha ◽  
César Elosúa ◽  
Francisco J. Arregui
Keyword(s):  
Optical Fiber ◽  
Aqueous Solutions ◽  
Limit Of Detection ◽  
Tap Water ◽  
Aqueous Media ◽  
Optical Fiber Sensor ◽  
Fluorescence Emission ◽  
Fiber Sensor ◽  
Buffer Solution ◽  
Fluorescence Quencher

A fluorescent optical fiber sensor for the detection of mercury (Hg2+) ions in aqueous solutions is presented in this work. The sensor was based on a fluorophore-labeled thymine (T)-rich oligodeoxyribonucleotide (ON) sequence that was directly immobilized onto the tip of a tapered optical fiber. In the presence of mercury ions, the formation of T–Hg2+-T mismatches quenches the fluorescence emission by the labeled fluorophore, which enables the measurement of Hg2+ ions in aqueous solutions. Thus, in contrast to commonly designed sensors, neither a fluorescence quencher nor a complementary ON sequence is required. The sensor presented a response time of 24.8 seconds toward 5 × 10−12 M Hg2+. It also showed both good reversibility (higher than the 95.8%) and selectivity: the I0/I variation was 10 times higher for Hg2+ ions than for Mn2+ ions. Other contaminants examined (Co2+, Ag+, Cd2+, Ni2+, Ca2+, Pb2+, Mn2+, Zn2+, Fe3+, and Cu2+) presented an even lower interference. The limit of detection of the sensor was 4.73 × 10−13 M Hg2+ in buffer solution and 9.03 × 10−13 M Hg2+ in ultrapure water, and was also able to detect 5 × 10−12 M Hg2+ in tap water.

Quantitative Determination of Cadmium in Water-Soluble Color Additives by Atomic Absorption Spectroscopy

1972 ◽  
Vol 55 (5) ◽  
pp. 1145-1149
Author(s):  
Lueangier Moten
Keyword(s):  
Aqueous Solutions ◽  
Quantitative Determination ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Quantitative Method ◽  
Water Soluble ◽  
Low Levels ◽  
Absorption Measurements

Abstract A quantitative method is presented for the determination of cadmium at low levels (5–20 ppm) in water-soluble color additives by atomic absorption spectroscopy. Absorption measurements were made on aqueous solutions of typical color additives to which known amounts of cadmium had been added. The method requires no pretreatment of sample and should be applicable to all water-soluble color additives.

Photochemical reflective optical fiber sensor for selective detection of phenol in aqueous solutions

2019 ◽  
Vol 58 (8) ◽  
pp. 2091
Author(s):  
Zhengkun Wang ◽  
Nianbing Zhong ◽  
Ming Chen ◽  
Haixing Chang ◽  
Dengjie Zhong ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Aqueous Solutions ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Selective Detection

Remote Measurements of X-Rays Dose Rate Using a Cerium-Doped Air-Clad Optical Fiber

2020 ◽  
Vol 67 (7) ◽  
pp. 1658-1662
Author(s):  
Jessica Bahout ◽  
Youcef Ouerdane ◽  
Hicham El Hamzaoui ◽  
Geraud Bouwmans ◽  
Mohamed Bouazaoui ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Dose Rate ◽  
X Rays ◽  
Remote Measurements

scholarly journals Tests and foreseen developments of fibered-OSLD gamma heating measurements in low-power reactors

2018 ◽  
Vol 170 ◽  
pp. 04010
Author(s):  
A. Gruel ◽  
M. Le Guillou ◽  
P. Blaise ◽  
C. Destouches ◽  
S. Magne
Keyword(s):  
Optical Fiber ◽  
Power Reactor ◽  
Experimental Phase ◽  
Measurement Protocol ◽  
Readout Time ◽  
Remote Measurements ◽  
On Line ◽  
Diode Pumped ◽  
Stimulation System ◽  
Gamma Flux

In this paper are presented test measurements of a fibered-OSLD system performed during a dedicated experimental phase in EOLE zero-power reactor. The measurement setup consists of an OSLD crystal connected onto the extremity of an optical fiber and a laser stimulation system, manufactured by the CEA/LIST in Saclay. The OSL sensor is remotely stimulated via an optical fiber using a diode-pumped solid-state laser. The OSL light is collected and guided back along the same fiber to a photomultiplier tube. Results obtained using this system are compared to usual gamma heating measurement protocol using OSLD pellets. The presence of induced radio-luminescence in the OSLD during the irradiation was also observed and could be used to monitor the gamma flux. The feasibility of remote measurements is achieved, whereas further developments could be conducted to improve this technique since the readout procedure still requires to withdraw the OSLD off the gamma flux (hence from the core) on account of the dose rate (around a few Gy.h-1), and the readout time remains quite long for on-line applications. Several improvements are foreseen, and will be tested in the forthcoming years.

Effect of the solvation state of electron in dissociative electron attachment reaction in aqueous solutions

2017 ◽  
Vol 19 (34) ◽  
pp. 23068-23077 ◽  
Author(s):  
Furong Wang ◽  
Pierre Archirel ◽  
Yusa Muroya ◽  
Shinichi Yamashita ◽  
Pascal Pernot ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Transient Absorption ◽  
Electron Attachment ◽  
Dissociative Electron Attachment ◽  
Solvation State ◽  
Absorption Measurements

Dissociative electron attachment induced by prehydrated electron is observed by using multichannel transient absorption measurements at the picosecond range.

scholarly journals Optical Fiber Tip Sensor for the Measurement of Glucose Aqueous Solutions

2018 ◽  
Vol 10 (5) ◽  
pp. 1-9 ◽  
Author(s):  
Susana Novais ◽  
Catarina I. A. Ferreira ◽  
Marta S. Ferreira ◽  
Joao L. Pinto
Keyword(s):  
Optical Fiber ◽  
Aqueous Solutions
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