26-04-2014, 02:50 PM
ELECTRONIC TONGUE
[attachment=62555]
INTRODUCTION
Flavour and taste control evaluation can be performed by gas and liquid sensor array systems—the so-called electronic tongue.
E-Tongue sensors are cross-selective and can react to many substances responsible for tastes .
Each sensor is sensitive to a range of components that is different from the other.
The information given by sensors is complementary, and the combination of responses result in a unique FINGERPRINT.
BASIC PRINCIPLE
The main elements of an electronic taste-sensing system are number of different sensor types attached to arm, a sample table, an amplifier, and a computer for data recording. This system imitates what is happening when molecules with specific taste nature interact with taste buds on the human tongue. The taste buds are represented by sensors which interact with these molecules at the surface initiating changes in potential. These signals are compared with physiological action potentials which are recorded by computer, which correspond to the neural network at the physiological level.
PATTERN RECOGNITION SYSTEM
Sophisticated software is required to handle the complex information yielded by the sensor responses. This software is based on powerful algorithms for pattern recognition and includes techniques such as principle component analysis (PCA), discrimination function analysis (DFA), statistical quality control (SQC). The different pattern recognition models are used to obtain a correlation between instrumental results and sensory tests.
PHARMACEUTICALS
Quantify taste-masking efficiency of pharmaceuticals (tablets, syrups, powders, capsules, etc.).
Monitor Herbal medicine.
Identify toxic substances.
Identify unpleasant taste of pharmaceuticals.
Characterize Caffeine, Paracetamol, phenylthiourea, Quinine hydrochloride, etc.
DISCRIMINATION OF DIFFERENT WHITE Chrysanthemum
It has been found by the scientific researches that white chrysanthemum has antioxidant activities and can protect cardiovascular system, prevent the cancer, resist fatigue and lower level of serum lipid.
It is an urgent problem to find a rapid, simple, credible way to determine the quality of white chrysanthemum.
CONCLUSION
Electronic tongues are emerging and promising fields in recent chemical sensor science.
It is a valuable tool for assessment and prediction of the taste of pharmaceuticals and related products.
It reduces the use of manpower.
The exposure and risk of using human panel to test products is greatly reduced, permitting better analytical results to quickly define the best formulation and get the product to market.
[attachment=62555]
INTRODUCTION
Flavour and taste control evaluation can be performed by gas and liquid sensor array systems—the so-called electronic tongue.
E-Tongue sensors are cross-selective and can react to many substances responsible for tastes .
Each sensor is sensitive to a range of components that is different from the other.
The information given by sensors is complementary, and the combination of responses result in a unique FINGERPRINT.
BASIC PRINCIPLE
The main elements of an electronic taste-sensing system are number of different sensor types attached to arm, a sample table, an amplifier, and a computer for data recording. This system imitates what is happening when molecules with specific taste nature interact with taste buds on the human tongue. The taste buds are represented by sensors which interact with these molecules at the surface initiating changes in potential. These signals are compared with physiological action potentials which are recorded by computer, which correspond to the neural network at the physiological level.
PATTERN RECOGNITION SYSTEM
Sophisticated software is required to handle the complex information yielded by the sensor responses. This software is based on powerful algorithms for pattern recognition and includes techniques such as principle component analysis (PCA), discrimination function analysis (DFA), statistical quality control (SQC). The different pattern recognition models are used to obtain a correlation between instrumental results and sensory tests.
PHARMACEUTICALS
Quantify taste-masking efficiency of pharmaceuticals (tablets, syrups, powders, capsules, etc.).
Monitor Herbal medicine.
Identify toxic substances.
Identify unpleasant taste of pharmaceuticals.
Characterize Caffeine, Paracetamol, phenylthiourea, Quinine hydrochloride, etc.
DISCRIMINATION OF DIFFERENT WHITE Chrysanthemum
It has been found by the scientific researches that white chrysanthemum has antioxidant activities and can protect cardiovascular system, prevent the cancer, resist fatigue and lower level of serum lipid.
It is an urgent problem to find a rapid, simple, credible way to determine the quality of white chrysanthemum.
CONCLUSION
Electronic tongues are emerging and promising fields in recent chemical sensor science.
It is a valuable tool for assessment and prediction of the taste of pharmaceuticals and related products.
It reduces the use of manpower.
The exposure and risk of using human panel to test products is greatly reduced, permitting better analytical results to quickly define the best formulation and get the product to market.