Comparison of various data analysis techniques applied for the classification of oligopeptides and amino acids by voltammetric electronic tongue

A micro-volume electronic tongue based on cyclic voltammetry with two sensing electrodes (gold and carbon) and a platinum pseudo-reference electrode is proposed to classify fertilizers and monitor fertilizer uptakes. The electronic tongue has been employed to classify three different types of commercial fertilizers and their mixture. The nutrient uptake of Dracaena Sanderiana (D. Sanderiana) planted in crystal soil with the mixture fertilizer was monitored by sampling the fertilizer solutions with the electronic tongue over a period of one week. The contents of macronutrients in the solutions were also analyzed by the standard spectroscopic techniques for comparison. A good agreement is obtained between the relative uptakes of phosphate and potassium from the electronic tongue analysis and those from the standard analytical techniques.

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Virtual Instrumentation Based Voltammetric Electronic Tongue for Classification of Black Tea

10.1109/iciinfs.2008.4798485 ◽

2008 ◽

Author(s):

Mousumi Palit ◽

Nabarun Bhattacharyya ◽

Subrata Sarkar ◽

Ankur Dutta ◽

Pallab Kumar Dutta ◽

...

Keyword(s):

Electronic Tongue ◽

Black Tea ◽

Virtual Instrumentation ◽

Voltammetric Electronic Tongue

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Electronic Tongues

MRS Bulletin ◽

10.1557/mrs2004.210 ◽

2004 ◽

Vol 29 (10) ◽

pp. 726-731 ◽

Cited By ~ 37

Author(s):

F. Winquist ◽

C. Krantz-Rülcker ◽

I. Lundström

Keyword(s):

Surface Plasmon Resonance ◽

Data Analysis ◽

Electronic Nose ◽

Multivariate Data Analysis ◽

Electrochemical Techniques ◽

Electronic Tongue ◽

Measurement Technology ◽

Piezoelectric Crystals ◽

Voltammetric Electronic Tongue ◽

Human Sense

AbstractThe use of multivariate data analysis combined with sensors with partially overlapping selectivities has become a very powerful tool in measurement technology. These systems are often referred to as artificial senses, because they function in a way similar to the human senses. One such system is the electronic nose. This article focuses on similar concepts as the electronic nose, but for use in aqueous solutions. Because these systems are related to the human sense of taste in the same way the electronic nose is related to olfaction, they have been termed taste sensors, or “electronic tongues.” Various measurement principles that can be used in electronic tongues are described and discussed in this article. These include electrochemical techniques such as potentiometry, voltammetry, and conductometry. Also, optical techniques based on light absorption at specific wavelengths or the use of surface plasmon resonance are described. Mass-sensitive devices based on piezoelectric crystals have also been used and are described here. A special emphasis is given to the voltammetric electronic tongue.

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