Volatile impurities in ethanol

Ethanol Commonly known as alcohol or spirits, it is a type of alcoholic compound with the chemical formula C. ₂ H ₆ O, the structural formula is CH. ₃ CH ₂ OH or C ₂ H ₅ OH. Ethanol burns very well and is widely used as a fuel, solvent, disinfectant, and in various other applications in organic synthesis.

Ethanol is a volatile, colorless, and transparent liquid at room temperature and atmospheric pressure. It has low toxicity and is completely miscible with water in any proportion. Its aqueous solutions have a characteristic alcoholic odor and are slightly irritating. Ethanol is also miscible with most organic solvents. When mixed with air, ethanol vapor can form an explosive mixture. Ethanol is a fundamental raw material in the organic chemical industry and is also used as an organic solvent, in the production of alcoholic beverages, and in the food industry.

Ethanol can be used to produce acetic acid, beverages, fragrances, dyes, fuels, and more. In medicine, ethanol with a volume fraction of 70% to 75% is commonly used as a disinfectant. Ethanol has wide-ranging applications in fields such as the chemical industry, healthcare, food processing, and agricultural production.

Shanghai Hanyao Selection HK-624 Gas Chromatography Column Detect volatile impurities in ethanol and compare them with... Agilent DB-624 for test comparison 。

Source of method: Chinese Pharmacopoeia, 2020 Edition

Chromatographic conditions

Column: HK-624 (30 m × 0.32 mm × 1.80 μm)

Detector: FID detector

Injection port temperature: 200℃, split ratio 8:1

Detector temperature: 280℃

The column temperature is programmed to increase gradually: Start at a temperature of 40℃, hold for 12 minutes, then increase the temperature at a rate of 10℃ per minute to 240℃, and hold at that temperature for 10 minutes.

Detection Spectrum

Conclusion

Select HK-624 GC Column The volatile impurities in ethanol were detected, and the detection requirements were met. Compared with Agilent DB-624, the theoretical plate numbers and separation performance of each chromatographic peak were essentially identical. ， Among them H The peak shape of K-624 acetal is significantly better than that of DB-624.

Keywords:

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