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.

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.

A highly sensitive naked-eye fluorescent probe for trace hydrazine based on ‘C-CN’ bond cleavage

The Analyst ◽  
2018 ◽  
Vol 143 (18) ◽  
pp. 4354-4358 ◽  
Author(s):  
Hai Xu ◽  
Zhen Huang ◽  
Yaqian Li ◽  
Biao Gu ◽  
Zile Zhou ◽  
...  
Keyword(s):  
Detection Limit ◽  
Fluorescent Probe ◽  
Water Samples ◽  
Bond Cleavage ◽  
Eye Detection ◽  
Naked Eye ◽  
Real Water Samples ◽  
Highly Sensitive ◽  
First Time ◽  
Naked Eye Detection

The ‘C–CN’ bond cleavage was applied to the recognition of N2H4 for the first time; the obvious change in color could be used for “naked-eye” detection; the corresponding detection limit was found to be 5.81 × 10−8 M (1.65 ppb); the probe could be applied for N2H4 detection in real water samples.

Selective fluorometric detection of F− and Zn(ii) ions by a N, O coordinating sensor and naked eye detection of Cu(ii) ions in mixed-aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44764-44777 ◽  
Author(s):  
Amar Hens ◽  
Kajal Krishna Rajak
Keyword(s):  
Aqueous Solution ◽  
Copper Ions ◽  
Blue Emission ◽  
Green Emission ◽  
Fluorometric Detection ◽  
Eye Detection ◽  
Naked Eye ◽  
Mixed Aqueous Solution ◽  
Naked Eye Detection

A N, O coordinating sensor fluorogenically detects fluoride anions (λex = 330 nm, λem = 450 nm) with blue emission and Zn(ii) ions with green emission (λex = 405 nm, λem = 515 nm) as well as colorimetrically detecting copper ions.

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 plasmonic ELISA for the naked-eye detection of chromium ions in water samples

2016 ◽  
Vol 409 (4) ◽  
pp. 1093-1100 ◽  
Author(s):  
Cuize Yao ◽  
Shiting Yu ◽  
Xiuqing Li ◽  
Ze Wu ◽  
Jiajie Liang ◽  
...  
Keyword(s):  
Water Samples ◽  
Eye Detection ◽  
Chromium Ions ◽  
Naked Eye ◽  
Naked Eye Detection

Water-soluble pyridine-based colorimetric chemosensor for naked eye detection of silver ions: design, synthesis, spectral and theoretical investigation

2014 ◽  
Vol 6 (24) ◽  
pp. 9610-9615 ◽  
Author(s):  
B. Annaraj ◽  
M. A. Neelakantan
Keyword(s):  
Water Samples ◽  
Silver Ions ◽  
Cost Effective ◽  
Water Soluble ◽  
Eye Detection ◽  
Design Synthesis ◽  
Naked Eye ◽  
Colorimetric Chemosensor ◽  
Test Kit ◽  
Naked Eye Detection

A selective and sensitive colorimetric chemosensor (L) for silver ions is reported. Various spectroscopic results show the sensing properties of (L). A simple and cost effective test kit has been prepared for the detection of silver ion in water samples.

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.

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