scholarly journals An improved amperometric determination of xanthine with xanthine oxidase nanoparticles for testing of fish meat freshness

2021 ◽  
pp. 100437
Author(s):  
Jyoti Ahlawat ◽  
Archana Joon ◽  
Vishakha Aggarwal ◽  
Ranjana Jaiwal ◽  
Chandra Shekhar Pundir
Keyword(s):  
Xanthine Oxidase ◽  
Amperometric Determination ◽  
Fish Meat

scholarly journals Efficient Oxidase Biosensors Based on Bioelectrocatalytic Surfaces of Electrodeposited Ferrocenyl Polycyclosiloxanes—Pt Nanoparticles

Chemosensors ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 81
Author(s):  
Alvaro Boluda ◽  
Carmen Casado ◽  
Beatriz Alonso ◽  
M. García Armada
Keyword(s):  
Xanthine Oxidase ◽  
Metallic Nanoparticles ◽  
Pt Nanoparticles ◽  
Covalent Immobilization ◽  
New Device ◽  
Long Term Stability ◽  
Fish Meat

The in-situ synthesis of catalytic surfaces with metallic nanoparticles must overcome the issues related to particle aggregation and polydispersity in the particle size. This work achieves it by using two electrodeposited ferrocenyl polycyclosiloxane polymers (MFPP and FPP) as templates for electro-synthesize Pt nanoparticles (PtNPS). In addition, this new electrode surface combines two efficient electrocatalysts: Ferrocene and Pt nanoparticles, with synergistic biocatalytic properties that constitute an electrocatalytic framework for the covalent immobilization of xanthine oxidase. In this work, we present the results of the kinetic, electrochemical and analytical studies of the prepared electrodes. These results showed that the PtNPs/FPP system is the best bioelectrocatalytic surface and improves other more complex xanthine oxidase devices based on the hydrogen peroxide oxidation, allowing the use of lower measuring potential with good sensitivity, wider linear ranges and low detection limits. In addition, this electrode provides the novelty of allowing the measurement of xanthine through the enzymatic consumption of oxygen at potential −0.1 V with a sensitivity of 1.10 A M−1 cm−2, linear ranges of 0.01–0.1 and 0.1–1.4 mM, low detection limit (48 nM) and long-term stability. The new device has been successfully applied to the determination of xanthine in fish meat.

scholarly journals Accurate quantitative determination of affinity and binding kinetics for tight binding inhibition of xanthine oxidase

2021 ◽  
Vol 139 ◽  
pp. 111664
Author(s):  
Haiyang Yang ◽  
Xueyan Li ◽  
Gang Li ◽  
Huating Huang ◽  
Wenning Yang ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Xanthine Oxidase ◽  
Tight Binding ◽  
Binding Kinetics ◽  
Binding Inhibition

scholarly journals Antioxidant activity, xanthine oxidase inhibitory activity, and compounds determination of Cipadessa baccifera leaf extract

2021 ◽  
Author(s):  
Syarifah Ramadhani Lubis ◽  
Subandi Subandi ◽  
Muntholib Muntholib ◽  
Jamilah Abbas ◽  
Tjandrawati Mozef
Keyword(s):  
Antioxidant Activity ◽  
Xanthine Oxidase ◽  
Inhibitory Activity ◽  
Leaf Extract

Gold Nanoparticles Modified Titania Nanotube Arrays for Amperometric Determination of Ascorbic Acid

2010 ◽  
Vol 43 (18) ◽  
pp. 2809-2822 ◽  
Author(s):  
T. G. Satheesh Babu ◽  
P. V. Suneesh ◽  
T. Ramachandran ◽  
Bipin Nair
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Nanotube Arrays ◽  
Amperometric Determination ◽  
Titania Nanotube Arrays ◽  
Titania Nanotube

Gas Chromatographic Method for Determination of Dimethylamine, Trimethylamine, and Trimethylamine Oxide in Fish-Meat Frankfurters

1991 ◽  
Vol 74 (2) ◽  
pp. 400-403
Author(s):  
Walter Fiddler ◽  
Robert C Doerr ◽  
Robert A Gates
Keyword(s):  
Atlantic Menhaden ◽  
Chromatographic Technique ◽  
Acid Extraction ◽  
Fish Meat ◽  
Flame Ionization ◽  
Trimethylamine Oxide ◽  
Headspace Gas ◽  
Gas Chromatographic Method ◽  
Gas Tight

Abstract A method Is described for analysis of minced fish-meat and surlmi-meat frankfurters for dimethylamine (DMA), trimethyiamine (TMA), and trimethyiamine oxide (TMAO) using a headspace-gas chromatographic technique. After simple acid extraction and addition of NaOH, the headspace was directly Injected Into a gas chromatograph by a gas-tight syringe. DMA and TMA were separated on a Chromosorb 103 column and detected by a flame Ionization detector. TMAO was measured as TMA after Zn reduction. Repeatability of the method for DMA, TMA, and TMAO was 6.6,1.0, and 18.8 ppm, respectively. The method was applicable to Alaska pollock-meat and Atlantic menhaden-meat frankfurters, unwashed, and washed mince and surlml.

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