Colorimetric detection of copper ions based on a supramolecular complex of water-soluble polythiophene and ATP

The Analyst ◽  
2013 ◽  
Vol 138 (6) ◽  
pp. 1649 ◽  
Author(s):  
Zhiyi Yao ◽  
Binghuan Huang ◽  
Xianping Hu ◽  
Li Zhang ◽  
Depeng Li ◽  
...  
Keyword(s):  
Copper Ions ◽  
Colorimetric Detection ◽  
Supramolecular Complex ◽  
Water Soluble

Water-soluble polymeric particle embedded cryogels: Synthesis, characterisation and adsorption of haemoglobin

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kadir Erol ◽  
Melda Bolat Bülter ◽  
Dursun Ali Köse ◽  
Hatice Kaplan Can
Keyword(s):  
Copper Ions ◽  
Langmuir Model ◽  
Water Soluble ◽  
Hydroxyethyl Methacrylate ◽  
Adsorption Ability ◽  
Adsorption Interaction ◽  
Polymeric Particle ◽  
Adsorption Desorption ◽  
Desorption Cycle ◽  
Soluble Poly

Abstract Making cryogels, which are among today’s accepted adsorbents, more functional with different methods, has been one of the subjects spent overtime. In this study, water-soluble poly(maleic anhydride-alt-acrylic acid) polymer embedded in poly(2-hydroxyethyl methacrylate) cryogels. Copper ions were then immobilised to this structure, and this polymer was used for adsorption of haemoglobin from aqueous systems. Adsorption interaction was carried out on an electrostatic basis, and approximately 448.62 mg haemoglobin/g polymer adsorption capacity value was obtained. It was found that the same material has managed to maintain its adsorption ability by 90.3% even after the use of it five times in the adsorption/desorption cycle. The adsorption interaction was determined to be appropriate for the Langmuir model by isotherm studies. The change in Gibbs free energy value was calculated as −2.168 kJ/mol.

Simple Colorimetric Detection of Amyloidβ-peptide (1-40) based on Aggregation of Gold Nanoparticles in the Presence of Copper Ions

Small ◽  
2015 ◽  
Vol 11 (18) ◽  
pp. 2144-2149 ◽  
Author(s):  
Yanli Zhou ◽  
Hui Dong ◽  
Lantao Liu ◽  
Maotian Xu
Keyword(s):  
Gold Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Detection

High efficient adsorption and colorimetric detection of trace copper ions with a functional filter paper

2016 ◽  
Vol 223 ◽  
pp. 853-860 ◽  
Author(s):  
Jun-jie Li ◽  
Chen-hui Ji ◽  
Chang-jun Hou ◽  
Dan-qun Huo ◽  
Su-yi Zhang ◽  
...  
Keyword(s):  
Filter Paper ◽  
Copper Ions ◽  
Colorimetric Detection ◽  
High Efficient

Colorimetric detection of copper ions using porphyrin-conjugated silica nanoparticles

2020 ◽  
Vol 12 (4) ◽  
pp. 381-389
Author(s):  
Baljinder Singh ◽  
Jungmin Lee ◽  
Hyeon-Gyu Kim ◽  
Myoung-Hwan Park ◽  
Kibeom Kim
Keyword(s):  
Silica Nanoparticles ◽  
Copper Ions ◽  
Colorimetric Detection

scholarly journals Rationale for the use of buckwheat husk for the production of functional food colors

2020 ◽  
Vol 10 (4) ◽  
pp. 22-28
Author(s):  
M.N. Shkolnikova ◽  
◽  
E.A. Kadritskaya ◽  
Keyword(s):  
Antioxidant Activity ◽  
Functional Food ◽  
Copper Ions ◽  
Ash Content ◽  
Water Soluble ◽  
Food Ingredients ◽  
High Fiber ◽  
Buckwheat Husk ◽  
Coloring Agents ◽  
Pectin Substances

The aim of the work was to substantiate the use of buckwheat husk for obtaining a functional food colorant melanin. The objects of the study were samples of buckwheat husk Fagopýrum esculéntum and isolated water-soluble melanin. The isolation of melanin was carried out by extraction of buckwheat husk with 4% NaOH at a hydraulic modulus of 1:20. The sorption capacity of the melanin extract was determined by its interaction with copper salt solutions in an alkaline medium. It has been established that a distinctive feature of buckwheat hulls is its low ash content, a rather high fiber content – 24.7–26.5%, and a sufficient content of pectin substances – 7.2–7.7% and melanin – 15.7–16.2%. The husk can be used for further processing in order to obtain the food coloring melanin. The experiment proved the ability of a melanin sample to bind copper ions: one gram of a 0.5% solution of buckwheat husk melanin extract bounded 966.6 mg/ml copper, and the antioxidant activity of one gram of melanin extract corresponds to the antioxidant activity of 0.056 g of rutin. Thus, water-soluble samples of melanin isolated from buckwheat hulls can be used as food coloring agents, as well as antioxidants and biosorbents, which makes it possible to recommend them as functional food ingredients in food.

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