A new spectroscopic protocol for selective detection of water soluble sulfides and cyanides: Use of Ag-nanoparticles synthesized by Ag(I)–reduction via photo-degradation of azo-food-colorants

2014 ◽  
Vol 275 ◽  
pp. 72-80 ◽  
Author(s):  
Niharendu Mahapatra ◽  
Shubhashis Datta ◽  
Mintu Halder
Keyword(s):  
Ag Nanoparticles ◽  
Water Soluble ◽  
Selective Detection ◽  
Photo Degradation ◽  
Food Colorants

scholarly journals Highly sensitive and selective colorimetric detection of dual metal ions (Hg2+ and Sn2+) in water: an eco-friendly approach

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14700-14709
Author(s):  
Rintumoni Paw ◽  
Moushumi Hazarika ◽  
Purna K. Boruah ◽  
Amlan Jyoti Kalita ◽  
Ankur K. Guha ◽  
...  
Keyword(s):  
Metal Ions ◽  
Ag Nanoparticles ◽  
Limit Of Detection ◽  
Colorimetric Detection ◽  
Garlic Extract ◽  
Selective Detection ◽  
Highly Sensitive ◽  
Dual Metal

Synthesis of Ag nanoparticles using Allin based garlic extract for highly sensitive and selective detection of metal ions Hg2+ and Sn2+ in water. The limit of detection (LoD) for Hg2+ and Sn2+ ions were found as 15.7 nM and 11.25 nM respectively.

scholarly journals Photo-transformation of aqueous nitroguanidine and 3-nitro-1,2,4-triazol-5-one : emerging munitions compounds

2021 ◽  
Author(s):  
Julie Becher ◽  
Samuel Beal ◽  
Susan Taylor ◽  
Katerina Dontsova ◽  
Dean Wilcox
Keyword(s):  
Aqueous Solutions ◽  
Degradation Products ◽  
Pure Water ◽  
Transformation Products ◽  
Water Soluble ◽  
Uv Exposure ◽  
Degradation Pathways ◽  
Solution Ph ◽  
Photo Degradation ◽  
Degradation Rates

Two major components of insensitive munition formulations, nitroguanidine (NQ) and 3-nitro-1,2,4-triazol-5-one (NTO), are highly water soluble and therefore likely to photo-transform while in solution in the environment. The ecotoxicities of NQ and NTO solutions are known to increase with UV exposure, but a detailed accounting of aqueous degradation rates, products, and pathways under different exposure wavelengths is currently lacking. We irradiated aqueous solutions of NQ and NTO over a 32-h period at three ultraviolet wavelengths and analyzed their degradation rates and transformation products. NQ was completely degraded by 30 min at 254 nm and by 4 h at 300 nm, but it was only 10% degraded after 32 h at 350 nm. Mass recoveries of NQ and its transformation products were >80% for all three wavelengths. NTO degradation was greatest at 300 nm with 3% remaining after 32 h, followed by 254 nm (7% remaining) and 350 nm (20% remaining). Mass recoveries of NTO and its transformation products were high for the first 8 h but decreased to 22–48% by 32 h. Environmental half-lives of NQ and NTO in pure water were estimated as 4 and 6 days, respectively. We propose photo-degradation pathways for NQ and NTO supported by observed and quantified degradation products and changes in solution pH.

A dual chemosensor for Cu2+ and Hg2+ based on a rhodamine-terminated water-soluble polymer in 100% aqueous solution

The Analyst ◽  
2018 ◽  
Vol 143 (22) ◽  
pp. 5395-5403 ◽  
Author(s):  
Guang Li ◽  
Liping Bai ◽  
Farong Tao ◽  
Aixia Deng ◽  
Liping Wang
Keyword(s):  
Aqueous Solution ◽  
Water Soluble ◽  
Selective Detection ◽  
Soluble Polymer ◽  
Water Soluble Polymer

A dual chemosensor based on rhodamine-terminated PEG was developed for the simultaneous selective detection of Cu2+ and Hg2+ in water.

Extremely Stable Water-Soluble Ag Nanoparticles

2005 ◽  
Vol 17 (18) ◽  
pp. 4630-4635 ◽  
Author(s):  
R. Christopher Doty ◽  
T. Robert Tshikhudo ◽  
Mathias Brust ◽  
David G. Fernig
Keyword(s):  
Ag Nanoparticles ◽  
Water Soluble
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