Highly reactive (<1 min) ratiometric “naked eye” detection of hypochlorite with real application in tap water

2013 ◽  
Vol 42 (28) ◽  
pp. 10097 ◽  
Author(s):  
Shyamaprosad Goswami ◽  
Sima Paul ◽  
Abhishek Manna
Keyword(s):  
Tap Water ◽  
Eye Detection ◽  
Real Application ◽  
Naked Eye ◽  
Naked Eye Detection

scholarly journals Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme

2018 ◽  
Author(s):  
Aron Hakonen ◽  
Niklas Strömberg
Keyword(s):  
Drinking Water ◽  
Tap Water ◽  
Low Cost ◽  
Consumer Products ◽  
Lead Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

Drinking water contamination of lead from various environmental sources, leaching consumer products and intrinsic water-pipe infrastructure is still today a matter of great concern. Therefore, new highly sensitive and convenient Pb2+ measurement schemes are necessary, especially for in-situ measurements at a low-cost. Within this work dye/ionophore/Pb2+ co-extraction and effective water phase de-colorization was utilized for highly sensitive lead measurements and sub-ppb naked-eye detection. A low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix and separate procedure was developed. Instrumental detection limits were in the low ppt region (LOD=3, LOQ=10), and naked-eye detection was 500 ppt. Note, however, that this sensing scheme still has improvement potential as concentrations of fluorophore and ionophore were not optimized. Artificial tap-water samples, leached by a standardized method, demonstrated drinking water application. Implications for this method are convenient in-situ lead ion measurements.

A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies

The Analyst ◽  
2019 ◽  
Vol 144 (21) ◽  
pp. 6422-6431 ◽  
Author(s):  
Veikko Uahengo ◽  
Johannes Naimhwaka ◽  
Likius S. Daniel ◽  
Ateeq Rahman ◽  
Mohamed I. Elzagheid ◽  
...  
Keyword(s):  
Real Time ◽  
Tap Water ◽  
Reaction Process ◽  
Spectroscopic Methods ◽  
Theoretical Studies ◽  
Eye Detection ◽  
Naked Eye ◽  
One Step ◽  
Naked Eye Detection ◽  
Experimental And Theoretical Studies

Herein, a naphthyl based sensor (L) was synthesized via a one-step reaction process, and its recognition properties towards biologically important anions were investigated by naked-eye observation and spectroscopic methods.

scholarly journals Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme

2018 ◽  
Author(s):  
Aron Hakonen ◽  
Niklas Strömberg
Keyword(s):  
Drinking Water ◽  
Tap Water ◽  
Low Cost ◽  
Consumer Products ◽  
Lead Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

Drinking water contamination of lead from various environmental sources, leaching consumer products and intrinsic water-pipe infrastructure is still today a matter of great concern. Therefore, new highly sensitive and convenient Pb2+ measurement schemes are necessary, especially for in-situ measurements at a low-cost. Within this work dye/ionophore/Pb2+ co-extraction and effective water phase de-colorization was utilized for highly sensitive lead measurements and sub-ppb naked-eye detection. Low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix, shake and separate procedure was developed. Instrumental detection limits were in the low ppt region (LOD=3, LOQ=10), and naked-eye detection was 500 ppt. Note, however, that this sensing scheme still has improvement potential as concentrations of fluorophore and ionophore were not optimized. Artificial tap-water samples, leached by a standardized method, demonstrated drinking water application. Implications for this method are convenient in-situ lead ion measurements.

scholarly journals Fluorescence and Naked-Eye Detection of Pb2+ in Drinking Water Using a Low-Cost Ionophore Based Sensing Scheme

Chemosensors ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 51 ◽  
Author(s):  
Aron Hakonen ◽  
Niklas Strömberg
Keyword(s):  
Drinking Water ◽  
Tap Water ◽  
Low Cost ◽  
Consumer Products ◽  
Lead Ion ◽  
Eye Detection ◽  
Naked Eye ◽  
Highly Sensitive ◽  
Naked Eye Detection

Drinking water contamination of lead from various environmental sources, leaching consumer products, and intrinsic water-pipe infrastructure is still today a matter of great concern. Therefore, new highly sensitive and convenient Pb2+ measurement schemes are necessary, especially for in-situ measurements at a low cost. Within this work dye/ionophore/Pb2+ co-extraction and effective water phase de-colorization was utilized for highly sensitive lead measurements and sub-ppb naked-eye detection. A low-cost ionophore Benzo-18-Crown-6-ether was used, and a simple test-tube mix and separate procedure was developed. Instrumental detection limits were in the low ppt region (LOD = 3, LOQ = 10), and naked-eye detection was 500 ppt. Note, however, that this sensing scheme still has improvement potential as concentrations of fluorophore and ionophore were not optimized. Artificial tap-water samples, leached by a standardized method, demonstrated drinking water application. Implications for this method are convenient in-situ lead ion measurements.

scholarly journals Correction: A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies

The Analyst ◽  
2020 ◽  
Vol 145 (1) ◽  
pp. 295-295
Author(s):  
Veikko Uahengo ◽  
Johannes Naimhwaka ◽  
Likius S. Daniel ◽  
Ateeq Rahman ◽  
Mohamed I. Elzagheid ◽  
...  
Keyword(s):  
Real Time ◽  
Tap Water ◽  
Theoretical Studies ◽  
Eye Detection ◽  
Colorimetric Probe ◽  
The Real ◽  
Naked Eye ◽  
Naked Eye Detection ◽  
Experimental And Theoretical Studies

Correction for ‘A colorimetric probe for the real-time naked eye detection of cyanide and hydroxide ions in tap water: experimental and theoretical studies’ by Veikko Uahengo et al., Analyst, 2019, 144, 6422–6431.

Natural betanin dye extracted from bougainvillea flowers for the naked-eye detection of copper ions in water samples

2016 ◽  
Vol 8 (25) ◽  
pp. 4977-4982 ◽  
Author(s):  
Mohamed Khairy ◽  
Mohamed Ismael ◽  
Rafat M. El-Khatib ◽  
Mostafa Abdelnaeem ◽  
Mariam Khalaf
Keyword(s):  
Optical Sensor ◽  
Water Samples ◽  
Copper Ions ◽  
Tap Water ◽  
Experimental Results ◽  
Selective Detection ◽  
Eye Detection ◽  
Color Changes ◽  
Naked Eye ◽  
Naked Eye Detection

A betanin-based colorimetric probe was simply extracted from bougainvillea flowers for the selective detection of Cu2+ ions. The experimental results showed that the betanin pigment could be employed as an optical sensor for Cu2+ with significant color changes in tap water samples.

scholarly journals A naphthoquinone based colorimetric probe for real-time naked eye detection of biologically important anions including cyanide ions in tap water: experimental and theoretical studies

RSC Advances ◽  
2019 ◽  
Vol 9 (65) ◽  
pp. 37926-37938 ◽  
Author(s):  
Johannes Naimhwaka ◽  
Veikko Uahengo
Keyword(s):  
Real Time ◽  
Tap Water ◽  
Aqueous Media ◽  
Spectroscopic Methods ◽  
Theoretical Studies ◽  
Water Mixture ◽  
Eye Detection ◽  
Naked Eye ◽  
Naked Eye Detection ◽  
Experimental And Theoretical Studies

A naphthoquinone based colorimetric sensor (N) bearing hydrazone receptors in aqueous media was developed and its recognition properties towards biologically important anions in DMSO–water mixture (9 : 1) were investigated using spectroscopic methods.

A terpyridine-based test strip for the detection of Hg2+ in various water samples and drinks

2019 ◽  
Vol 11 (2) ◽  
pp. 227-231 ◽  
Author(s):  
Junjun Wang ◽  
Qingpeng Rao ◽  
Haiyan Wang ◽  
Qiong Zhang ◽  
Gang Liu ◽  
...  
Keyword(s):  
Water Samples ◽  
Tap Water ◽  
Test Strip ◽  
Eye Detection ◽  
Fluorescent Compound ◽  
Test Strips ◽  
Naked Eye ◽  
Naked Eye Detection

TPI, a novel colorimetric fluorescent compound prepared for test strips, can be used for naked-eye detection of Hg2+ in tap water samples and drinks conveniently.

Naked-Eye Detection of Hg(II) Ions by Visible Light-Induced Polymerization Initiated by a Hg(II)-Selective Photoredox Catalyst

2021 ◽  
Author(s):  
Hyungwook Kim ◽  
Young Jae Jung ◽  
Jungkyu K. Lee
Keyword(s):  
Visible Light ◽  
Signal Amplification ◽  
Eye Detection ◽  
Naked Eye ◽  
Turn On ◽  
Novel Strategy ◽  
Amplification Strategy ◽  
Naked Eye Detection

We developed a novel strategy for signal amplification strategy using a visible light-induced photopolymerization, initiated by a selective turn-on photoredox catalyst. As photoredox catalysts, fluorescein derivatives are able to initiate...

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