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Quantitative detection method for aroma compounds in Baijiu

A quantitative detection method and detection method technology are applied in the detection field to achieve the effect of good repeatability

Inactive Publication Date: 2019-11-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few applications in solid matrices, and there are no related applications in liquid matrices, especially alcoholic beverage matrices. For the complex and unique matrix characteristics of alcoholic beverage matrices, suitable analysis conditions need to be systematically optimized.

Method used

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  • Quantitative detection method for aroma compounds in Baijiu
  • Quantitative detection method for aroma compounds in Baijiu
  • Quantitative detection method for aroma compounds in Baijiu

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Using SPME Arrow technology to perform solid phase microextraction on the liquor sample to be tested:

[0029] (1) use boiled ultrapure water to dilute the liquor sample to 10% vol;

[0030] (2) Add 2g NaCl and 5ml diluted liquor sample into a 20mL glass headspace bottle, and seal it with a septum screw cap;

[0031] (3) Stir the configured sample continuously at 250 rpm for 5 min at 45°C. After equilibration, the SPME Arrow fibers were placed in the headspace for 50 min at the same temperature and stirring speed. Subsequently, the fibers were introduced into the GC injector port at 250 °C and desorbed in splitless mode for 5 min. Each sample was analyzed in triplicate.

[0032] 2. Quantitative detection of aroma compounds obtained by solid phase microextraction by GC-MS:

[0033] GC-MS analysis was performed on an Agilent 7890 gas chromatograph equipped with an Agilent 5977B mass spectrometer (California, USA), and samples were analyzed with a capillary column D...

Embodiment 2

[0034] Embodiment 2: Selection of extraction head

[0035] Based on five commonly used solid-phase extraction heads: polydimethylsiloxane 250 μm (PDMS), polydimethylsiloxane / divinylbenzene 120 μm (PDMS / DVB), polyacrylate 100 μm (PA), wide Carbon Range / Dimethicone 120 μm (Carbon WR / PDMS), and Divinylbenzene / Broad Carbon Range / Dimethicone 120 μm (DVB / Carbon WR / PDMS). According to the types and amounts of liquor aroma compounds adsorbed by different extraction heads, that is, according to the peak area of ​​the corresponding compounds detected by different extraction heads in the same sample, the strength of the ability of the solid phase extraction head to extract liquor aroma compounds can be judged. The results are as follows figure 2 and shown in Table 1.

[0036] Table 1 The types of aroma compounds in liquor detected by different solid-phase extraction heads

[0037]

[0038] It can be seen from Table 1 that the results obtained by using DVB / Carbon WR / PDMS extraction ma...

Embodiment 3

[0039] Embodiment 3: the selection of extraction condition

[0040] SPME involves a three-phase equilibrium process, so extraction conditions have a huge impact on the results. CCD tests were performed with DVB / Carbon WR / PDMS fiber coating using alcohol content (sample dilution), NaCl addition, extraction time, and extraction temperature as four independent variables. Sample dilution, extraction time, and extraction temperature may affect HS-SPME Arrow extraction efficiency because they have a greater impact on the vapor pressure and the phase equilibrium between the concentration of volatile compounds in the headspace (HS) and the sample solution. The addition of NaCl further promotes the volatilization of volatile compounds from the solution into the headspace due to the "salting out" effect. In this experiment, different alcohol levels of 2%, 6%, 10%, 14% and 18%, different salt addition amounts of 0g, 0.5g, 1g, 1.5g and 2g, different extraction times of 15min, 30min, 45mi...

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Abstract

The invention discloses a quantitative detection method for aroma compounds in Baijiu and belongs to the technical field of detection. According to the method, an SPME Arrow technology and a GC-MS technology are combined, so that the SPME Arrow extraction technology can be optimized; and 82 aroma compounds (such as esters, alcohols, fatty acids, aldehydes, ketones, furans, pyrazines, sulfur-containing compounds, phenols, terpenes and lactones) in Baijiu are subjected to qualitative and quantitative analysis by using the optimized extraction method and gas chromatography-mass spectrometry (GC-MS). It has been verified that the quantitative method has high repeatability, intra-day and inter-day precision and accuracy. SPME Arrow is a method capable of effectively extracting volatile components of Baijiu and other distilled liquors, and can be used for researching the compositions of volatile compounds in different types of Baijiu.

Description

technical field [0001] The invention relates to a quantitative detection method for aroma compounds in liquor, belonging to the technical field of detection. Background technique [0002] The aroma profile is one of the most important characteristics of distilled spirits and is influenced by several factors such as the different types of raw materials used, as well as the conditions used during production and aging. Over a thousand volatile compounds have been identified through the analysis of different distilled spirits from around the world. However, less than 5% of these volatile compounds identified were aroma active. Identification and analysis of these aroma-active compounds in distilled spirits is an important tool for understanding the sensory properties of products and controlling their quality. The complex production process produces a variety of flavor substances, which endow liquor with various flavors. It has been reported that more than 200 aroma compounds ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8679G01N2030/025G01N2030/062
Inventor 陈双徐岩张馨元
Owner JIANGNAN UNIV
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