Rapid approach for the determination of alcoholic strength and overall quality check of various spirit drinks and wines using GC–MS

Stupák, Michal; Kocourek, Vladimı́r; Kolouchová, Irena; Hajšlová, Jana

doi:10.1016/j.foodcont.2017.05.008

Cited by 46 publications

(30 citation statements)

References 14 publications

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“…From the above-mentioned paragraph, it should be evident that the determination of ethanol is of great importance in many areas of technological processing, as well as common life and there are numerous instrumental techniques convenient for this purpose. Gas chromatography (GC) with the quantification via the internal standard(s) can be considered as universal method for analysis of alcoholic drinks, often spirits [3]. Otherwise, Fourier-transform infrared spectroscopy (FTIR) [4], near infrared (NIR) [5], and Raman spectrometry (RS) [6] represent other commonly used instrumental techniques suitable for analysis of alcoholic drinks.…”

Section: Introductionmentioning

confidence: 99%

Determination of Ethanol in Alcoholic Drinks: Flow Injection Analysis with Amperometric Detection Versus Portable Raman Spectrometer

2020

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A flow injection analysis with integrated amperometric alcohol dehydrogenase biosensor and a handheld Mira‐DS Raman spectrometer have been compared for the determination of ethanol in different samples of alcoholic drinks. The biosensor was constructed from the commercial screen‐printed carbon electrode as amperometric transducer and covered by a thin layer comprising alcohol dehydrogenase, reduced single‐layer graphene oxide, rhodium(IV) dioxide, and glutaraldehyde. Both assemblies were tested on analysis of plum brandy, white rum, vodka, white and red wines, strong dark beer, and non‐alcoholic beer. The two principally different analytical methods were critically compared and some limitations found, especially in case of analysis of red wine and beers. Finally, some future improvements of both analytical tools under test outlined.

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Section: Introductionmentioning

confidence: 99%

Determination of Ethanol in Alcoholic Drinks: Flow Injection Analysis with Amperometric Detection Versus Portable Raman Spectrometer

2020

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“…Detection of ethanol (EtOH) vapors, as one of volatile organic compounds (VOCs) and metabolites, has received particular attention in a wide range of industrial activities such as beverage, food, pharmaceutical, cosmetics, and others [1][2][3]. The presence and or concentration of EtOH vapors were evaluated using established, accurate and reproducible methods such as Fourier Transform Infra-Red (FTIR) spectroscopy [2] or gas chromatography equipped with a mass spectrometer as a detector (GC-MS) [3]. However, both methods are time-consuming and require a lengthy sample preparation procedure.…”

Section: Introductionmentioning

confidence: 99%

Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

et al. 2020

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Modified gold complexes as dinuclear adducts with silver bridge ions, clusters with other metal ions, and bimetallic sandwiches have shown better sensing capabilities for vapochromic chemosensing of organic vapors than its unmodified structure. Herein, a simple gold(I) complex, synthesized from 4-(3,5-dimethoxybenzyl)-3,5-dimethyl pyrazole ligand, have been shown to have higher sensing capability toward ethanol (EtOH) vapors. Such sensing capability can be possibly achieved when EtOH vapors have enough time to diffuse to the main sensing sites of the sensor. Thus, 80 to 160 µL (with 20 µL increment) of EtOH vapors were exposed to the synthesized gold(I) pyrazolate complex at varied distances of 2.75, 11 and 22 cm for 15 minutes. The complex displayed its sensing capability by quenching at its emission intensity of 600 nm up to 80%, which suggests the possible interaction of the EtOH vapors with the inner sensing site originated from the Au(I)–Au(I) interaction of the complex where it is possible to breakdown the light-emitting capability. Prior to this interaction, there was only a slight blue-shifting of 9 nm away from its emission intensity by the binding of EtOH vapors to the methoxy of benzene ring hence only demonstrating weak sensing capability. These results indicated that sensing capability as shown by the quenching phenomenon at the emission intensity of gold(I) complex is dependent on diffusion time of EtOH vapors.

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“…3,4 Both of these scenarios demand easy, immediate, on-site sensing of ethanol, which precludes using such traditional in-laboratory techniques as gas chromatography, liquid chromatography, mass spectrometry and UV-vis spectrometry. [5][6][7][8][9][10][11] Handheld electronic and optoelectronic noses are prevalent in vapor ethanol detection but are less compatible with liquid phase and have relatively high costs. [12][13][14] Colorimetric sensing is inexpensive and easy to use and thus has become a popular direction for developing on-site ethanol indicators.…”

Section: Introductionmentioning

confidence: 99%

Colorimetric Ethanol Indicator Based on Instantaneous, Localized Wetting of a Photonic Crystal

Brandt

Nicolas

et al. 2019

ACS Appl. Mater. Interfaces

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Easy-to-use sensors for ethanol solutions have broad applications ranging from monitoring alcohol quality to combating underage drinking. Although there are a number of electronic and colorimetric sensors available for determining alcohol concentration, there is currently no device that can concurrently provide a prompt, well-defined, quickly recoverable readout and remain readily affordable. Here, we developed a field-ready, colorimetric indicator that provides fast, clear identification of ethanol/water mixtures between 0 to 40% based on the discoloration of a wetted photonic crystal. We cooperatively exploit the iridescence and the geometrical gating in silica inverse opal films (IOF), together with a finetuned surface chemistry gradient, to distinguish ethanol concentrations by their wettability patterns in different segments of the IOF. The resultant all-in-one colorimetric sensor delivers a striking and instantaneous optical response at ethanol concentration as low as 5%. We further improve the ease of use by seamlessly integrating this colorimetric platform with drinking glassware (a glass stirrer and a vial). This research provides an optimal means for colorimetric ethanol detection and is a step towards the immersible sensing of diverse molecules (e.g. biomarkers) in aqueous solutions without expensive laboratory tests.

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Rapid approach for the determination of alcoholic strength and overall quality check of various spirit drinks and wines using GC–MS

Cited by 46 publications

References 14 publications

Determination of Ethanol in Alcoholic Drinks: Flow Injection Analysis with Amperometric Detection Versus Portable Raman Spectrometer

Determination of Ethanol in Alcoholic Drinks: Flow Injection Analysis with Amperometric Detection Versus Portable Raman Spectrometer

Systematic Study on Sensing Capability of Gold(I) Pyrazolate Complex for Vapochromic Chemosensors of Ethanol Vapors

Colorimetric Ethanol Indicator Based on Instantaneous, Localized Wetting of a Photonic Crystal

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