Varieties & Technology

Effects of Different Storage, Processing and Extraction Methods on the Content of 2-acetyl-1-pyrroline in Fragrant Rice

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  • State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Bioresources, South China Agricultural University/Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs/Guangzhou Key Laboratory for Science and Technology of Aromatic rice, Guangzhou 510642, China
First author contact:

1st author: yaoxbgd@126.com

Received date: 2024-09-27

  Online published: 2025-03-12

Abstract

To improve the efficiency and accuracy of 2-acetyl-1-pyrroline(2-AP) detection, the experiment selected 4 fragrant rice varieties as materials and used gas chromatography-mass spectrometry (GC-MS) technology to detect the content of 2-AP in fragrant rice under different storage, processing, and extraction methods. The experiment set up 4 storage temperatures (25 ℃, 4 ℃, -20 ℃, -80 ℃), 4 milling times (15 s, 30 s, 60 s, 90 s), and 18 extraction methods (ultrasonic extraction, 70 ℃ water bath heating extraction, ultrasonic+70 ℃ water bath heating extraction, with extraction times of 0.5, 1.0, 2.0, 3.0, 4.0, 5.0 h). The results showed that the content of 2-AP in fragrant rice stored at -20 ℃ and -80 ℃ was significantly higher than that stored at other temperatures, with no significant difference between -20 ℃ and -80 ℃ storage temperatures. The Milling time significantly affected the 2-AP content in fragrant rice, with the lowest 2-AP content observed after 30 seconds of milling and a high level reached at 60 seconds. Ultrasonic extraction and 70 ℃ water bath heating extraction showed the best effect after 4 hours of extraction, after which the 2-AP content began to decrease. To ensure accuracy and efficient detection of 2-AP in fragrant rice, the following measures are recommended: store fragrat rice samples at -20 ℃ after maturation, prioritize ultrasonic extraction or 70 ℃ water bath extraction, and control milling time to 60 s to minimize the loss of 2-AP.

Cite this article

YAO Xiangbin, ZHANG YingYing, LUO Haowen, WEI Jianjiao, QI JianYing, TANG Xiangru, DUAN Meiyang . Effects of Different Storage, Processing and Extraction Methods on the Content of 2-acetyl-1-pyrroline in Fragrant Rice[J]. China Rice, 2025 , 31(2) : 92 -96 . DOI: 10.3969/j.issn.1006-8082.2025.02.016

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