scholarly journals Highly Sensitive Optical Sensor for Selective Detection of Fluoride Level in Drinking Water: Methodology to Fabrication of Prototype Device

2021 ◽  
Author(s):  
Arka Chatterjee ◽  
Nivedita Pan ◽  
Tuhin Kumar Maji ◽  
Sheik Saleem Pasha ◽  
Soumendra Singh ◽  
...  
Keyword(s):  
Drinking Water ◽  
Steady State ◽  
Detection Limit ◽  
Aqueous Media ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Detection ◽  
Highly Sensitive ◽  
Prototype Device

<p><b>Excess consumption of fluoride through drinking water and its detrimental effects on human health have been a serious global concern. Therefore, frequent monitoring as well as quantitative determination of fluoride ion (F<sup>-</sup>) concentration in aqueous media is of vital importance. Herein, we have developed a facile</b> <b>and</b> <b>highly sensitive spectroscopic technique for selective detection of F<sup>-</sup> in aqueous media using aluminium phthalocyanine chloride (AlPc-Cl) as a sensor. The absorbance as well as steady-state fluorescence intensity of AlPc-Cl has been found to decrease in presence of F<sup>-</sup> which has been used as a marker for the determination of fluoride ion concentration in water. The structural change in AlPc-Cl after addition of F<sup>-</sup> has been thoroughly studied by using <sup>19</sup>F NMR (Nuclear Magnetic Resonance) spectroscopy. Our detailed steady-state as well as time-resolved fluorescence studies reveal that the quenching mechanism is static in nature due to ground state complexation in between F<sup>-</sup> and AlPc-Cl molecules. The response of the sensor is found to be linear over the F<sup>-</sup> concentration regime from 0 to 6 parts per million (ppm) with a detection limit of 0.05 ppm. Additionally, it shows an excellent selectivity as well as an insignificant change in sensitivity even in the presence of interfering iron and aluminium ions. Based on the detailed photophysical study, we have further developed a low cost and portable prototype device which shows an excellent sensitivity with the detection limit of 0.10 ppm. This prototype device has a high prospect for real-time monitoring of fluoride ion concentration especially in remote areas.</b></p>

scholarly journals Highly Sensitive Optical Sensor for Selective Detection of Fluoride Level in Drinking Water: Methodology to Fabrication of Prototype Device

2021 ◽  
Author(s):  
Arka Chatterjee ◽  
Nivedita Pan ◽  
Tuhin Kumar Maji ◽  
Sheik Saleem Pasha ◽  
Soumendra Singh ◽  
...  
Keyword(s):  
Drinking Water ◽  
Steady State ◽  
Detection Limit ◽  
Aqueous Media ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Detection ◽  
Highly Sensitive ◽  
Prototype Device

<p><b>Excess consumption of fluoride through drinking water and its detrimental effects on human health have been a serious global concern. Therefore, frequent monitoring as well as quantitative determination of fluoride ion (F<sup>-</sup>) concentration in aqueous media is of vital importance. Herein, we have developed a facile</b> <b>and</b> <b>highly sensitive spectroscopic technique for selective detection of F<sup>-</sup> in aqueous media using aluminium phthalocyanine chloride (AlPc-Cl) as a sensor. The absorbance as well as steady-state fluorescence intensity of AlPc-Cl has been found to decrease in presence of F<sup>-</sup> which has been used as a marker for the determination of fluoride ion concentration in water. The structural change in AlPc-Cl after addition of F<sup>-</sup> has been thoroughly studied by using <sup>19</sup>F NMR (Nuclear Magnetic Resonance) spectroscopy. Our detailed steady-state as well as time-resolved fluorescence studies reveal that the quenching mechanism is static in nature due to ground state complexation in between F<sup>-</sup> and AlPc-Cl molecules. The response of the sensor is found to be linear over the F<sup>-</sup> concentration regime from 0 to 6 parts per million (ppm) with a detection limit of 0.05 ppm. Additionally, it shows an excellent selectivity as well as an insignificant change in sensitivity even in the presence of interfering iron and aluminium ions. Based on the detailed photophysical study, we have further developed a low cost and portable prototype device which shows an excellent sensitivity with the detection limit of 0.10 ppm. This prototype device has a high prospect for real-time monitoring of fluoride ion concentration especially in remote areas.</b></p>

scholarly journals Quantitative determination of fluoride in pure water using luminescent europium complexes

2015 ◽  
Vol 51 (54) ◽  
pp. 10879-10882 ◽  
Author(s):  
Stephen J. Butler
Keyword(s):  
Drinking Water ◽  
Quantitative Determination ◽  
Water Samples ◽  
Pure Water ◽  
Selective Detection ◽  
Water Fluoridation ◽  
Europium Complexes ◽  
Highly Sensitive ◽  
Drinking Water Samples

Two luminescent europium complexes are reported, each capable of the rapid, selective detection of fluoride in water. The probes are highly sensitive, permitting the quantitative determination of fluoride in drinking water samples, within the concentration range relevant to water fluoridation (20–210 μM).

A hydrolytically stable uranyl organic framework for highly sensitive and selective detection of Fe3+ in aqueous media

2018 ◽  
Vol 47 (3) ◽  
pp. 649-653 ◽  
Author(s):  
Wei Liu ◽  
Jian Xie ◽  
Linmeng Zhang ◽  
Mark A. Silver ◽  
Shuao Wang
Keyword(s):  
Detection Limit ◽  
Metal Organic Framework ◽  
Aqueous Media ◽  
Depleted Uranium ◽  
Selective Detection ◽  
Low Detection Limit ◽  
Highly Sensitive ◽  
Metal Organic ◽  
Organic Framework

A depleted uranium-based metal organic framework is synthesized and it exhibits highly sensitive and selective detection towards Fe3+ ions in aqueous media with an extremely low detection limit of 6.3 ppb.

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

Automated Fluoride Ion Determination

1977 ◽  
Vol 14 (1-6) ◽  
pp. 269-274 ◽  
Author(s):  
David C. Cowell
Keyword(s):  
Continuous Flow ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Selective Electrode ◽  
Automated Method ◽  
Electrode Response ◽  
Kinetics Of ◽  
Fluoride Ion Selective Electrode ◽  
Flow Techniques

An automated method is described, using standard continuous flow techniques, for the determination of urine fluoride ion concentration using a fluoride ion selective electrode. It is shown that the kinetics of the electrode response to changes in fluoride ion can be used for the accurate measurement of fluoride ion concentration in urine, and that equilibration of the electrode response is not a prerequisite for the measurement of fluoride ion. Recovery experiments are in the range 83 to 90%; in-batch precision is between 0·9 and 1·6% and carryover 2·5% or less.

scholarly journals Construction of Two Stable Co(II)-Based Hydrogen-Bonded Organic Frameworks as a Luminescent Probe for Recognition of Fe3+ and Cr2O72− in H2O

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5955
Author(s):  
Qi-Ying Weng ◽  
Ya-Li Zhao ◽  
Jia-Ming Li ◽  
Miao Ouyang
Keyword(s):  
Detection Limit ◽  
Aqueous Media ◽  
Three Dimensional ◽  
Cobalt Atom ◽  
High Sensitivity ◽  
X Ray Diffraction ◽  
Chlorobenzoic Acid ◽  
X Ray ◽  
Highly Sensitive ◽  
Hydrogen Bonded

A pair of cobalt(II)-based hydrogen-bonded organic frameworks (HOFs), [Co(pca)2(bmimb)]n (1) and [Co2(pca)4(bimb)2] (2), where Hpca = p-chlorobenzoic acid, bmimb = 1,3-bis((2-methylimidazol-1-yl)methyl)benzene, and bimb = 1,4-bis(imidazol-1-ylmethyl)benzene were hydrothermally synthesized and characterized through infrared spectroscopy (IR), elemental and thermal analysis (EA), power X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD) analyses. X-ray diffraction structural analysis revealed that 1 has a one-dimensional (1D) infinite chain network through the deprotonated pca− monodentate chelation and with a μ2-bmimb bridge Co(II) atom, and 2 is a binuclear Co(II) complex construction with a pair of symmetry-related pca− and bimb ligands. For both 1 and 2, each cobalt atom has four coordinated twisted tetrahedral configurations with a N2O2 donor set. Then, 1 and 2 are further extended into three-dimensional (3D) or two-dimensional (2D) hydrogen-bonded organic frameworks through C–H···Cl interactions. Topologically, HOFs 1 and 2 can be simplified as a 4-connected qtz topology with a Schläfli symbol {64·82} and a 4-connected sql topology with a Schläfli symbol {44·62}, respectively. The fluorescent sensing application of 1 was investigated; 1 exhibits high sensitivity recognition for Fe3+ (Ksv: 10970 M−1 and detection limit: 19 μM) and Cr2O72− (Ksv: 12960 M−1 and detection limit: 20 μM). This work provides a feasible detection platform of HOFs for highly sensitive discrimination of Fe3+ and Cr2O72− in aqueous media.

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