scholarly journals Electronic nose based on nanoweights, expectation and reality

2017 ◽  
Vol 89 (10) ◽  
pp. 1587-1601 ◽  
Author(s):  
Tatyana Anatolievna Kuchmenko
Keyword(s):  
Electronic Nose ◽  
Raw Materials ◽  
Visual Image ◽  
Quantitative Information ◽  
Volatile Components ◽  
Integral Image ◽  
Standard Samples ◽  
Wine Quality ◽  
Electronic Noses ◽  
Complicated Task

AbstractOne of the topical approaches in analysis – outside the framework of traditional ones – is the formation of an integral “image” of the object. There are several approaches to solving the issue of obtaining as much information about the sample by a certain portion of its properties or its composition as possible. The first approach is forming a visual image (diagram) of several different properties of the analyzed sample, for example, the content of certain metals, acids, volatile components and some other indicators of wine quality. The consolidated image of a sample enables us to distinguish samples identical or similar in the selected properties from crucially different ones, even in case of an acceptable change of each indicator. Or else, using the consolidated image one can evaluate the direction of an image shift of a certain sample compared to the set of standard samples. The analysis of the geometry of the sample image by diverse indicators affords ground for assumption of the reasons for this deviation, as well as identification of falsification, or even solution of a more complicated task: detecting the area of growth of raw materials. The second approach is close to the first one in terms of methodology, but it digitizes properties using detectors and presents this as an image (“visual print” of response) of signals of these detectors on some components of the sample (presence, content). The feature of this approach is the use of a detector system that is non-selective and cross-sensitive to certain sample components. These sample images are produced using a system of “electronic nose”. “Visual prints” of array signals of different character sensors contain qualitative and quantitative information about the part of the analyzed sample which is sorbed by sensors. Despite the uncertainty of this information, “electronic noses” of piezoelectric type are widely used in the analysis of samples with complex varying composition.

Comparative flavor analysis of four kinds of sweet fermented grains by sensory analysis combined with GC-MS

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Lei Wang ◽  
Ke Yang ◽  
Liu Liu
Keyword(s):  
Physicochemical Properties ◽  
Volatile Compounds ◽  
Electronic Nose ◽  
Sensory Analysis ◽  
Raw Materials ◽  
Electronic Tongue ◽  
Volatile Components ◽  
Red Rice ◽  
Different Types ◽  
Fermented Grains

Abstract Four types of cereals (glutinous rice, purple rice, red rice, yellow millet) were selected to produce sweet fermented grains. Flavor profiles of sweet fermented grains are comparatively studied to distinguish various flavor types by using GC-MS, electronic nose (E-nose), and sensory analysis, and the amino acid composition and physicochemical properties of sweet fermented grains were analyzed. The results showed that the volatile compounds of sweet fermented grains were significantly different. Esters and alcohols were the major volatile compounds in sweet fermented grains. The electronic nose, electronic tongue and sensory analysis jointly verified that the volatile components of sweet fermented grains had differences between them. The sweet fermented grains could be classified based on differences in volatile compounds. In the amino acids analysis, Glu, Pro, Asp and Leu were the most abundant. The difference in physicochemical properties is more helpful to distinguish different types of sweet fermented grains. Correlation analysis between antioxidant active substances and color value showed a positive correlation between with a* value, and a negative correlation with L*, b* value. Our results suggested that there were differences in the flavor characteristics of sweet fermented grains fermented from different types of cereals. The results of the study will provide valuable information for the selection of raw materials for sweet fermented grains.

Wine Quality Assessment using Electronic Nose

2021 ◽  
Author(s):  
Kranthi Kumar Pulluri ◽  
Vaegae Naveen Kumar
Keyword(s):  
Quality Assessment ◽  
Electronic Nose ◽  
Wine Quality

scholarly journals Analysis of Volatile Components of Auricularia auricula from Different Origins by GC-MS Combined with Electronic Nose

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Lijun Fu ◽  
Gen Yang ◽  
Li Liu ◽  
Yongzheng Ma ◽  
Xiumin Zhang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Electronic Nose ◽  
Relative Content ◽  
Volatile Components ◽  
Auricularia Auricula ◽  
Edible Fungus ◽  
Odor Activity Value ◽  
Diethyl Azodicarboxylate ◽  
Different Origins ◽  
High Degree

Auricularia auricula is a kind of nutrient-rich edible fungus, which has the reputation of “king of vegetarians.” In this paper, the electronic nose combined with GC-MS technology was used to analyze the volatile components of A. auricula in Heilongjiang, Jilin, Shanghai, and Sichuan provinces to investigate the differences and characteristics of A. auricula in different origins. The results showed that the electronic nose could obviously distinguish the samples from Jilin and Shanghai with a high degree of discrimination, while it was inappropriate to distinguish the samples from Heilongjiang and Sichuan Province. GC-MS was used to further analyze the volatile compounds in A. auricula qualitatively and quantitatively. The results showed that 98 volatile components were detected and 23 of them were common components, including alcohols, aldehydes, acids, esters, hydrocarbons, and other volatile components. The relative content of acetic acid and diethyl azodicarboxylate in A. auricula from the four origins was relatively high. According to the relative odor activity value (ROAV), it was found that the key compounds that caused the aroma difference between different origins were 1-octene-3-ol, cis-3-nonene-1-ol, (E)-2-octenal, (E)-2-nonenal, (E,E)-2,4-nonadienal, and 3-methyl butanal.

scholarly journals Fast screening of some flavonoids content in raw plant materials: opportunities of 1H NMR spectroscopy

2020 ◽  
Vol 169 ◽  
pp. 02006
Author(s):  
Gennady Kalabin ◽  
Vasilii Vasil’ev ◽  
Vasilii Ivlev ◽  
Vasilii Babkin
Keyword(s):  
Nmr Spectroscopy ◽  
Plant Biomass ◽  
Raw Materials ◽  
Biologically Active ◽  
Raw Material ◽  
Standard Samples ◽  
Plant Materials ◽  
H Nmr ◽  
Fast Screening ◽  
Raw Plant Materials

Environmental monitoring and assessment of the prospects for extracting biologically active substances (BAS) from various types of plant biomass requires the development of simple and fast methods for measuring their content in raw materials. A new approach for measuring the content of various flavonoids groups in plant raw material using 1H NMR spectroscopy has been developed, which allows to characterize its resource capabilities and study the effects on their composition different environmental factors without complex sample preparation and standard samples.

The need for electronic noses for environmental odour exposure assessment

2013 ◽  
Vol 69 (1) ◽  
pp. 135-141 ◽  
Author(s):  
Laura Capelli ◽  
Licinia Dentoni ◽  
Selena Sironi ◽  
Renato Del Rosso
Keyword(s):  
Exposure Assessment ◽  
Electronic Nose ◽  
Landfill Gas ◽  
Monitoring Site ◽  
Electronic Noses ◽  
Odour Source ◽  
Detection Frequency ◽  
Odour Emissions ◽  
Electronic Nose Technology

This paper focuses on the opportunities for using electronic noses for odour exposure assessment purposes, especially in cases where dispersion modelling is not applicable. Such cases include, for instance, those sources where a detailed characterisation and quantification of the odour emissions for every hour of the simulation time domain is particularly difficult, due to the nature of the source or to the variability of the emissions over time. In such situations, it is useful to determine odour exposure directly at receptors instead. This paper critically discusses the state of the art of electronic nose technology as far as its application to the determination of odour exposure at receptors is concerned. One example of electronic nose application to the monitoring of odours from an Italian municipal solid waste (MSW) landfill is reported, in order to discuss the instrument's potential and limits. The monitoring results are represented by the number of measures that are classified in a specific olfactory class; this information allows the odour exposure at each monitoring site in terms of odour detection frequency to be determined. Besides a quantification of the odour episodes, electronic noses allowed the identification of the landfill gas as the monitored landfill major odour source.

scholarly journals A Prototype to Detect the Alcohol Content of Beers Based on an Electronic Nose

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2646 ◽  
Author(s):  
Henike Guilherme Jordan Voss ◽  
José Jair Alves Mendes Júnior ◽  
Murilo Eduardo Farinelli ◽  
Sergio Luiz Stevan
Keyword(s):  
Metal Oxide ◽  
Electronic Nose ◽  
Gas Sensors ◽  
Metal Oxide Semiconductor ◽  
Oxide Semiconductor ◽  
Alcohol Content ◽  
Electronic Noses

Due to the emergence of new microbreweries in the Brazilian market, there is a need to construct equipment to quickly and accurately identify the alcohol content in beverages, together with a reduced marketing cost. Towards this purpose, the electronic noses prove to be the most suitable equipment for this situation. In this work, a prototype was developed to detect the concentration of ethanol in a high spectrum of beers presents in the market. It was used cheap and easy-to-acquire 13 gas sensors made with a metal oxide semiconductor (MOS). Samples with 15 predetermined alcohol contents were used for the training and construction of the models. For validation, seven different commercial beverages were used. The correlation (R2) of 0.888 for the MLR (RMSE = 0.45) and the error of 5.47% for the ELM (RMSE = 0.33) demonstrate that the equipment can be an effective tool for detecting the levels of alcohol contained in beverages.

scholarly journals A Sustainable Development Strategy for the Uzbekistan Textile Industry: The Results of a SWOT-AHP Analysis

2019 ◽  
Vol 11 (17) ◽  
pp. 4613 ◽  
Author(s):  
Yong-Jeong Kim ◽  
Jaehun Park
Keyword(s):  
Development Strategy ◽  
Strategic Alliances ◽  
Textile Industry ◽  
Industrial Structure ◽  
Raw Materials ◽  
Economic Value ◽  
Quantitative Information ◽  
Ahp Model ◽  
Effective Development

Uzbekistan is paying great attention to the textile industry as an industry offering a traditional production advantage, coming to the conclusion that it is necessary to establish and implement effective policies. In Uzbekistan as in other developing countries, whereas there are many strategic directions and development strategies to be considered for key industries, investment resources are limited. Therefore, it is necessary to prioritize and to apply limited resources accordingly. Even though research on the textile industry in Uzbekistan is ongoing for a long time, most of the resultant literature concerns only general industrial trends and pertinent investment and advancement strategies. The present study examined sustainable, concrete, and effective development strategy directions for the Uzbekistan textile industry using strengths, weaknesses, opportunities, and threats (SWOT) analytic hierarchy process (AHP) model. The SWOT-AHP model was tested in a case study on Uzbekistan’s textile industry. In the case study, the results were presented in an illustrative way by utilizing the quantitative information achieved by the model. The results indicated that the weakness and opportunity (WO) strategy had the highest importance, and suggested accordingly that priority should be given to that strategy for Uzbekistan’s textile industry development. The results further suggested that the Uzbekistan government should endeavor to upgrade obsolescent technology and solve the problems of high-priced imported raw materials and workers’ low education level, which are weak points of the textile industry of that country. Also, Uzbekistan should gradually shift the industrial structure from raw cotton to finished textile exportation, which offers relatively high added economic value. To achieve this, the Uzbek government needs to promote joint ventures and strategic alliances with foreign companies wishing to enter the textile industry through foreign direct investment (FDI) schemes.

scholarly journals Actual aspects of standardization of medicinal vegetative raw materials containing flavonoids

2011 ◽  
Vol 10 (5) ◽  
pp. 150-154
Author(s):  
A. V. Kurkina
Keyword(s):  
Medicinal Plants ◽  
High Performance ◽  
Raw Materials ◽  
Mentha Piperita ◽  
Standard Samples ◽  
Tanacetum Vulgare ◽  
New Approaches ◽  
Plant Drugs ◽  
Aerva Lanata ◽  
Layer Chromatography

The main purpose of our paper is the studies on the substantiation of the new approaches to the chemical standardization of plant drugs and their medicines containing flavonoids. On the basis of the study of chemical composition of medicinal plants there were developed the methodic and methodological approaches to the standardization of plant drugs and preparations containing flavonoids. We studied such medicinal plants as Helichrysum arenarium (L.) Moench., Tanacetum vulgare L., Artemisia dracunculus L., Mentha piperita L., Agrimonia eupatoria L., Aerva lanata L., Matricaria chamomilla L. We used such methods as spectrophotometry, thin layer chromatography, high performance liquid chromatography. For purpose of standardization were recommended the state standard samples of rutin, cynaroside and isosalipurposide. The developed new approaches to standardization of medicinal plants containing flavonoids and their medicines will be useful in elaboration of new phytopharmaceuticals.

scholarly journals The analytical capabilities of the systems of artificial sense of smell and taste. Part 1. “Electronic nose”

2019 ◽  
Vol 81 (3) ◽  
pp. 236-241
Author(s):  
L. B. Novikova ◽  
T. A. Kuchmenko
Keyword(s):  
Electronic Nose ◽  
Raw Materials ◽  
Small Mass ◽  
Diagnostic Methods ◽  
Multisensor Systems ◽  
Non Invasive ◽  
Minimal Sample ◽  
Traditional Research ◽  
Analytical Review ◽  
Search For Information

The first part of the analytical review presents the main directions of application of modern Multisensor systems such as "electronic nose". The review is based on the results of the umbrella search for information on the given words and phrases. Umbrella search has shown its effectiveness in organizing publications in the selected area, reducing the number of repetitive links and unrelated to the topic of the search. The search was carried out on the electronic catalogs of Russian and international search engines. The tendency of growth of interest to the chosen subject for the last 10 years is traced. Traditional research directions for artificial smell systems are noted. After a slight decline in 2005-2010, the share of work to address the challenges of improving quality and safety in all sectors of human activity, including the food industry, agriculture and the environment, is growing. Some solutions in the field of analysis of food products, raw materials, finished products are systematized. A new direction of research using "electronic nose" systems based on sensors of different types of action is discussed. This direction is medicine, while there is a significant breakthrough in the intensity of the use of EN in medical practice for the development of non-invasive diagnostic methods. The positive properties of such devices and approaches are a short study time, minimal sample preparation and recovery of the system after measurement, as well as a small mass/volume of the sample, the possibility of non-invasive diagnosis. The most frequently published research on the results of the use of such systems in the analysis of bioassays, especially interesting non-invasive diagnosis. Among the diagnosed lead direction oncological, gynecological, psychiatric. However, there are single publications and to solve problems in Pediatrics, dentistry, endocrinology and others.

scholarly journals Analysis of surfacing materials from cast carbide alloys using inductively coupled plasma atomic emission spectrometry (ICP-AES)

2018 ◽  
Vol 84 (6) ◽  
pp. 5-10
Author(s):  
A. V. Vyacheslavov ◽  
V. V. Tsepkova ◽  
A. D. Titova ◽  
T. N. Ermolaeva
Keyword(s):  
Sample Preparation ◽  
Inductively Coupled Plasma ◽  
Analytical Form ◽  
Emission Spectrometry ◽  
Acid Mixture ◽  
Volatile Components ◽  
Single Element ◽  
Plasma Atomic Emission Spectrometry ◽  
Standard Samples ◽  
Weight Variation

A technique for analysis of surfacing materials (cast cobalt-based carbide alloys) using by ICP-AES in combination with microwave autoclave sample preparation is developed. Composition of the acid mixture, temperature and time parameters of the sample preparation under microwave heating in an autoclave are specified, thus ensuring complete quantitative transfer of the sample into a convenient analytical form without losses of volatile components for the subsequent ICP-AES analysis. Analytic lines of the elements free from spectral interference were chosen to determine all the rated components in the casting materials from cast carbide alloys. Study of surfacing materials was carried out using alloys Pr-B3K-PrH-U10Kh63B5, Pr-B3K-P-PrN-U20Kh57B10 and TsN-2-E-190K62X29B5C2, containing the alloying elements (% wt.): Co (up to 65); Cr (28.0 – 32.0); W (4.0 – 11.0); Si (1.0 to 3.0); C (1.0 – 2.0); Ni (0.1 – 2.0); Mn (0.3 – 0.6) and Fe (up to 2.0). The correctness of determining rated element was confirmed in analysis of standard samples using sample weight variation. The developed technique was tested on industrial prototypes of surfacing materials made of cobalt-based cast carbide alloys of tested grades. The method is rapid (11-fold reduction in the time of analysis) and reagent-saving (by 12.5 times) procedure compared to single-element methods by 11 times and reduction of the volume of applied reagents. Combination of the multielement ICP-AES method with microwave sample preparation provides an increase in the accuracy of Si, Cr, Mn, Fe, Ni, and W determination in surfacing materials of cast carbide alloys within a range of rated concentrations.

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