Preparation and characterization of a novel tetrakis(4-hydroxyphenyl)porphyrin–graphene oxide nanocomposite and application in an optical sensor and determination of mercury ions

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 93310-93317 ◽  
Author(s):  
Rouholah Zare-Dorabei ◽  
Rahmatollah Rahimi ◽  
Asgar Koohi ◽  
Solmaz Zargari
Keyword(s):  
Graphene Oxide ◽  
Optical Sensor ◽  
Chemical Sensor ◽  
Mercury Ions ◽  
Optical Chemical Sensor

Optical chemical sensor for determination of mercury ions.

scholarly journals A Simple and Sensitive Optode Sensor Glucose Based on Immobilization Benedict Into Nata Cellulose Membranes

2020 ◽  
Vol 15 (4) ◽  
pp. 404
Author(s):  
Dhony Hermanto ◽  
Rochmad Kris Sanjaya ◽  
Nurul Ismillayli
Keyword(s):  
Optimum Condition ◽  
Optical Sensor ◽  
Chemical Sensor ◽  
Limit Of Detection ◽  
Glucose Determination ◽  
Sensor Glucose ◽  
Supporting Material ◽  
Cellulose Membranes

Determination of glucose concentration in urine and blood that anyone can use at any time is Benedict reagent based chemical sensor. This optical sensor was developed by immobilizing Benedict reagent into nata cellulose as supporting material via entrapment. The nata cellulose/Benedict membrane for glucose determination has optimum condition at maximum wavelenght   of 541.57 nm, Benedict concentration of 0.4470 M, and ratio of nata cellulse mass to Benedict volume was 1:3. Characterization of optical sensor for glucose was in working range of 0-5000 ppm, limit of detection was 911,11 ppm, sensitivity was 0.0009 and reproducibility was 0.2295%.

Molecular Imprinted Graphene Oxide Nanocomposite for Optical Sensing of Nicotine in Human Blood Plasma

2020 ◽  
Vol 42 (6) ◽  
pp. 856-856
Author(s):  
Sehrish Qazi Sehrish Qazi ◽  
Huma Shaikh Huma Shaikh ◽  
Ayaz Ali Memon Ayaz Ali Memon ◽  
and Shahabuddin Memon and Shahabuddin Memon
Keyword(s):  
Graphene Oxide ◽  
Human Plasma ◽  
Human Blood ◽  
Optical Sensor ◽  
Single Layer ◽  
Human Blood Plasma ◽  
Buffer Concentration ◽  
Imprinted Polymer ◽  
Ft Ir

Among all psychotropic alkaloids, nicotine is more addictive, carcinogenic and capable of causing many health problems. This work is based on the development of highly robust, cheap, reliable, selective and sensitive nicotine imprinted graphene oxide nanocomposite (ImpGO nanocomposite) based optical sensor for determination of nicotine in human plasma. The ImpGO nanocomposite has been thoroughly characterized using different techniques i.e. FT-IR, SEM, TEM, Raman, etc. These characterizations revealed that ImpGO nanocomposite is comprised of single layer of graphene oxide successfully modified with imprinted polymer. The synthesized material was utilized to selectively determine nicotine using UV-vis spectrophotometer in BR buffer of 0.1 M at pH 3 and diluted human plasma. The effect of parameters such as buffer concentration, pH, amount of nanocomposite, etc on determination of nicotine using ImpGO nanocomposite were studied thoroughly. Thus, a sensitive optical method was developed for determination of nicotine in human plasma with linear range of 22-370 pM along with LOD and LOQ of 7 pM and 22 pM, respectively. The selectivity of sensor was evaluated using homologues of nicotine such as nicotine amide, caffeine and cotinine. The results obtained from biological samples showed that developed optical sensor is efficient in complex matrices of real sample.

A New Optical Chemical Sensor Based on Benzoxazole and Its Application to the Determination of Ethacrynic Acid

1997 ◽  
Vol 30 (2) ◽  
pp. 221-233 ◽  
Author(s):  
Ying Wang ◽  
Wan-Hui Liu ◽  
Ji-Hong Wang ◽  
Ke-Min Wang ◽  
Guo-Li Shen ◽  
...  
Keyword(s):  
Chemical Sensor ◽  
Ethacrynic Acid ◽  
Optical Chemical Sensor

scholarly journals Synthesis and characterization of a ZnMn2O4nanostructure as a chemical nanosensor: a facile and new approach for colorimetric determination of omeprazole and lansoprazole drugs

RSC Advances ◽  
2017 ◽  
Vol 7 (69) ◽  
pp. 43798-43811 ◽  
Author(s):  
Mostafa Y. Nassar ◽  
Eman A. El-Moety ◽  
M. F. El-Shahat
Keyword(s):  
Chemical Sensor ◽  
Combustion Method ◽  
Synthesis And Characterization ◽  
Colorimetric Determination ◽  
New Approach ◽  
Auto Combustion

ZnMn2O4nanostructure was preparedviaan auto-combustion method using different fuels, and it was used as a chemical sensor for determination of omeprazole and lansoprazole drugs.

scholarly journals Synthesis of Porphyrin- Graphene Oxide Nanocomposite for an Optical Chemical Sensor Application

2014 ◽  
Author(s):  
Rahmatollah Rahimi ◽  
Rouholah Zare-Dorabei ◽  
Asgar Koohi ◽  
Solmaz Zargari
Keyword(s):  
Graphene Oxide ◽  
Chemical Sensor ◽  
Optical Chemical Sensor ◽  
Sensor Application
Sign in / Sign up

Export Citation Format

Share Document