Greenly synthesized graphene with l-glutathione-modified electrode and its application towards determination of rutin

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 94024-94032 ◽  
Author(s):  
Yudong Gao ◽  
Lu Wang ◽  
Yulong Zhang ◽  
Shuo Li ◽  
Lina Zou ◽  
...  
Keyword(s):  
Modified Electrode ◽  
Environmentally Friendly ◽  
Cost Effective ◽  
Water Soluble ◽  
Voltammetric Sensor ◽  
Cost Effective Approach ◽  
Sensor Platform

A simple, environmentally friendly and cost-effective approach for preparation of water-soluble functional graphene was proposed for constructing a voltammetric sensor platform.

scholarly journals Determination of Cr (VI) Content in Water-Soluble Dyes

2020 ◽  
Vol 59 (1) ◽  
pp. 88-94
Author(s):  
M P Sathianarayanan ◽  
Rina Nayak ◽  
Yogesh Hande
Keyword(s):  
Spectroscopic Analysis ◽  
Extraction Procedure ◽  
Cost Effective ◽  
High Load ◽  
Water Soluble ◽  
Recovery Study ◽  
Good Repeatability ◽  
Repeatability And Reproducibility ◽  
Standard Solution

Abstract Hexavalent chromium detection in the presence of high load of colorants is a challenge, and it is an important area of study. Colorants are a class of interfering substance in many spectroscopic analysis and chromatographic separation and detection. In this study, a method has been developed to separate out Cr (VI) and water-soluble dyes by using activated charcoal as an absorption medium. The extraction procedure was optimized with Cr (VI) standard solution for quantification. The efficacy of the extraction procedure for the removal of water-soluble dyes and detection of Cr (VI) was checked with a spike recovery study. Based on the spike recovery study, the method has been validated as per the international validation protocol. The method is simple, cost effective and has a detection limit down up to 3.0 mg/kg. The recovery rate of Cr (VI) in water-soluble dyes like reactive yellow HE 6G, reactive red 218, turquoise blue HGN, reactive navy blue RX and reactive black 5A was found to be more than 90% with a good repeatability and reproducibility.

scholarly journals Rheometer enabled study of cartilage frequency-dependent properties

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Stefano Perni ◽  
Polina Prokopovich
Keyword(s):  
Applied Load ◽  
Cost Effective ◽  
Constant Load ◽  
Hydraulic Permeability ◽  
Frequency Dependent ◽  
Shear Moduli ◽  
Tissue Replacement ◽  
Cost Effective Approach ◽  
The Impact

AbstractDespite the well-established dependence of cartilage mechanical properties on the frequency of the applied load, most research in the field is carried out in either load-free or constant load conditions because of the complexity of the equipment required for the determination of time-dependent properties. These simpler analyses provide a limited representation of cartilage properties thus greatly reducing the impact of the information gathered hindering the understanding of the mechanisms involved in this tissue replacement, development and pathology. More complex techniques could represent better investigative methods, but their uptake in cartilage research is limited by the highly specialised training required and cost of the equipment. There is, therefore, a clear need for alternative experimental approaches to cartilage testing to be deployed in research and clinical settings using more user-friendly and financial accessible devices. Frequency dependent material properties can be determined through rheometry that is an easy to use requiring a relatively inexpensive device; we present how a commercial rheometer can be adapted to determine the viscoelastic properties of articular cartilage. Frequency-sweep tests were run at various applied normal loads on immature, mature and trypsinased (as model of osteoarthritis) cartilage samples to determine the dynamic shear moduli (G*, G′ G″) of the tissues. Moduli increased with increasing frequency and applied load; mature cartilage had generally the highest moduli and GAG depleted samples the lowest. Hydraulic permeability (KH) was estimated from the rheological data and decreased with applied load; GAG depleted cartilage exhibited higher hydraulic permeability than either immature or mature tissues. The rheometer-based methodology developed was validated by the close comparison of the rheometer-obtained cartilage characteristics (G*, G′, G″, KH) with results obtained with more complex testing techniques available in literature. Rheometry is relatively simpler and does not require highly capital intensive machinery and staff training is more accessible; thus the use of a rheometer would represent a cost-effective approach for the determination of frequency-dependent properties of cartilage for more comprehensive and impactful results for both healthcare professional and R&D.

scholarly journals A Voltammetric Sensor Based on MgFe2 O4 Decorated on Reduced Graphene Oxide-modified Electrode for Sensitive and Simultaneous Determination of Catechol and Hydroquinone

2018 ◽  
Vol 30 (11) ◽  
pp. 2620-2627 ◽  
Author(s):  
Miloš Ognjanović ◽  
Dalibor M. Stanković ◽  
Martin Fabián ◽  
Aleksandar Vukadinović ◽  
Željko Prijović ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Simultaneous Determination ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Voltammetric Sensor ◽  
Reduced Graphene

A voltammetric sensor based on eosin Y film modified glassy carbon electrode for simultaneous determination of hydroquinone and catechol

2014 ◽  
Vol 6 (16) ◽  
pp. 6494-6503 ◽  
Author(s):  
Jiahong He ◽  
Ri Qiu ◽  
Wenpo Li ◽  
Shaohua Xing ◽  
Zhongrong Song ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Simultaneous Determination ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Eosin Y ◽  
Carbon Electrode ◽  
Voltammetric Sensor ◽  
Modified Glassy Carbon Electrode

By using cyclic voltammetry, eosin Y film was electrodeposited on the surface of glassy carbon electrode (GCE) to obtain the modified electrode (denoted as eosin Y/GCE).

Determination of Matrine Using a New Voltammetric Sensor Based on L-Cysteine/Graphene Oxide-Chitosan Composite Film Modified Electrode

2012 ◽  
Vol 24 (3) ◽  
pp. 691-698 ◽  
Author(s):  
Fangyuan Zhao ◽  
Le Wang ◽  
Yanling Liu ◽  
Ge Song ◽  
Fei Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Film ◽  
Modified Electrode ◽  
Voltammetric Sensor ◽  
Chitosan Composite
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