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Chapter and Conference Paper
Geo-tracing of Coffee Beans Using Metal Oxide Semiconductor Gas Sensors Array
The determination of food freshness and quality using human senses can be biased. Coffee is a beverage known for its popularity and increase in demand. The quality and price of coffee differ based on its geo-o...
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Chapter and Conference Paper
Investigation of the Effect of Polyvinyl Acetate Coating on Multiple U‐shaped Fibre Optic Sensors in Different Solution Conditions
U-shaped fibre optic sensors (FOSs) have been developed by many researchers in view of the low-cost and miniaturised size. The sensitivity of the FOS towards refractive index (RI) changes is affected by the fi...
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Chapter and Conference Paper
Temperature Modulation of Metal Oxide Semiconductor Gas Sensors for Black Pepper Geo-Tracing
It is essential to determine whether the food produced for commercialization is genuine and of good quality to protect consumer rights. Black pepper is one of the most common spices and its quality and price d...
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Article
Synthesis of yellow fluorescent carbon dots and their application to the determination of chromium(III) with selectivity improved by pH tuning
Carbon dots with yellow fluorescence (y-CDs) were synthesized from sucrose by acid carbonization with phosphoric acid as the dehydrating agent. Optimal yield was obtained by heating sucrose in concentrated pho...
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Article
Detection of Sn(II) ions via quenching of the fluorescence of carbon nanodots
We report that fluorescent carbon nanodots (C-dots) can act as an optical probe for quantifying Sn(II) ions in aqueous solution. C-dots are synthesized by carbonization and surface oxidation of preformed sago ...
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Article
Spectrofluorometry study of β-cyclodextrin and N-phenyl-1-naphthylamine inclusion complex and its analytical application via artificial neural network
The interaction between β-cyclodextrin (βCD) and N-phenyl-1-naphthylamine has been studied spectrofluorimetrically and found to form a 1:1 (βCD:NPN) inclusion complex at optimum conditions of pH 8 with the format...
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Article
Size-controlled microbeads through the influence of the coalescence effect in the emulsification solvent evaporation method
This paper reports a novel, simple, repeatable and cost-effective protocol for producing Ca-alginate beads with controlled sizes ranging from 50–250 μm with a narrow size distribution. The characteristics of t...
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Article
Demonstration of a simple, economical and practical technique utilising an imprinted polymer for metal ion sensing
This paper describes a simple, economical and practical optical sensor that has been developed using an ion imprinted polymer for detecting copper(II) ion using reflectance spectrometry. The imprinted polymer ...
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Article
Fluorescence sensor using a molecularly imprinted polymer as a recognition receptor for the detection of aluminium ions in aqueous media
This paper describes the investigation of a molecularly imprinted polymer (MIP) as a sensing receptor for Al3+ ion detection by using an optical approach. Al3+ ion was adopted as the template molecule and 8-hydro...
