Paper Info
Title
Sulfide Species Optical Monitoring by a Miniaturized Silicon Photomultiplier.
Abstract
The monitoring of water-soluble pollutants is receiving a growing interest from the scientific community. In this context, sulfide anion species S2- and HS- are particularly relevant since they can cause acute and chronic toxicity including neurological effects and at high concentrations, even death. In this study, a new strategy for fast and sensitive optical detection of sulfide species in water samples is described. The method uses an integrated silicon photomultiplier (SiPM) device coupled with the appropriate analytical strategy applied in a plastic microchip with dried reagents on board. More specifically, all sulfide species (H2S, HS- and S2-) in water samples are detected by the fluorescence signal emitted upon the reaction with N, N-dimethyl-phenylenediamine sulfate in the presence of Fe3+, leading to the formation of the fluorescent methylene blue (MB) species. It has been proven that the system herein proposed is able to measure sulfide concentration in a linear range from 0-10 mg L-1 with a sensitivity value of about 6.7 mu A mg(-1) L and a detection limit of 0.5 mg L-1. A comparison with conventional UV-Vis detection method has been also carried out. Data show a very good linear correlation (R-2 = 0.98093), proving the effectiveness of the method. Results pave the way toward the development of portable and low-cost device systems for water-soluble sulfide pollutants.
Year
DOI
Venue
2018
10.3390/s18030727
SENSORS
Keywords
Field
DocType
sulfide,silicon photomultiplier,water
Detection limit,Analytical chemistry,Methylene blue,Sulfide,Fluorescence,Pollutant,Silicon photomultiplier,Linear range,Engineering,Reagent
Journal
Volume
Issue
ISSN
18
3.0
1424-8220
Citations 
PageRank 
References 
0
0.34
0
Authors
6
Name
Order
Citations
PageRank
Salvatore Petralia104.06
Emanuele L. Sciuto200.34
Santangelo, M.F.301.35
S. Libertino401.35
Maria Anna Messina500.34
Sabrina Conoci665.58