Solution: Liquor composition analysis

changior — Wed, 30 Mar 2022 10:12:01 +0000

Chinese liquor culture has a long history, extensive and profound. Aroma components of liquor include alcohols, esters, acids, aldehydes and ketones, acetals, aromatic compounds, nitrogenous compounds and furan compounds, etc. Esters are aromatic compounds, which play an important role in all kinds of flavor liquor and are the main factor of forming strong aroma of liquor.

Ethyl acetate, ethyl propionate and ethyl lactate were important flavor components in liquor. The detection and control of various components in the process of liquor (flavor) production is the key to ensure the quality of liquor (flavor). More and more brand liquor production enterprises use scientific gas chromatography analysis for quality control and development of new products, and technical supervision departments at all levels use gas chromatography to monitor the quality of liquor.

1.Detection Index

Ethyl lactate, ethyl caproate, ethyl acetate, methanol, etc

2.Instrument configuration

1．Gas chromatograph with hydrogen flame ionization detector, high sensitivity
2．Chromatographic column: capillary liquor column 30m*0.32mm*0.5um
3．Standard product: 22 components of liquor standard sample
4．Chromatography workstation: double channel, a workstation can be connected to two chromatographs
5．Gas source: nitrogen cylinder gas (99.999%), hydrogen generator, air generator

3.Experimental conditions

1． Column temperature: initial temperature 50℃ initial 5min, 6℃/min, final temperature 160℃, final 10min
2． Carrier gas: nitrogen
3． Column pressure: 0.05mpa
4． Fractional injection
5． Vaporization: 230℃
6． Detector: FID 250℃

4.Spectra data

5.Suite of Equipment

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Determination of 3-Methanethiol in Sesame-Flavor Liquor

changior — Sat, 26 Mar 2022 02:26:13 +0000

3-methylthiopropyl alcohol, also known as pineapple alcohol, has a strong onion taste, dilution will appear soy sauce smell, mainly used for sauce seasoning, belongs to the edible spices allowed to use by the state. 3-methylthiopropyl alcohol was identified as the characteristic flavor substance of sesame-flavor liquor, and the appropriate detection method of 3-methylthiopropyl alcohol was very important to improve the quality of sesame-flavor liquor.

According to the national standard requirements of GB/T 20824-2007 sesame flavor liquor, the content of 3-methanethiol should be detected. In this experiment, the instrument we used was GC7900 gas chromatograph with flame photometric detector. All the gas path of the instrument is fully EPC control, all operations can be operated on the computer, simple operation, multi-point correction, correlation coefficient of 0.999 or more, in line with the national standard requirements.

1. Detection components:

3-methylthiol propyl alcohol

2.instrument configuration:

Gas chromatograph: Flame photometric detector
Chromatographic column: HT-930 30m*0.32mm*0.5μm
Standard liquid: 3-methylthiyl propyl alcohol standard liquid
Carrier gas cylinder gas: nitrogen, hydrogen, air

3. Experimental conditions

Detector: 220℃
Injector: 200℃
Column temperature: 100℃ (2min) 10℃/min to 180℃ (10min)

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