Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (6): 1357-1367.DOI: 10.3969/j.issn.1004-1524.20230926

• Food Science • Previous Articles     Next Articles

Ultrasound-assisted enzymolytic extraction of chlorohemin from yak blood powder: response surface optimization and quality characterization

ZHANG Jin1(), WU Xiaoli1,2, TIAN Yuwei3, ZHAO Ke1, LI Huanhuan1, Dase 4, Cirendajie 4, CHEN Lihong1, TANG Honggang1,*()   

  1. 1. State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    2. College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China
    3. School of Science, Xingzhi College Zhejiang Normal University, Jinhua 310018, Zhejiang, China
    4. Naqu Gonyal Animal Husbandry Technology and Industry Company, Naqu 852014, Xizang, China
  • Received:2023-07-28 Online:2024-06-25 Published:2024-07-02

Abstract:

The objective of this work was to extract, optimize, and evaluate the chlorohemin from yak blood powder using ultrasonic-assisted enzymolytic technology. The ultrasound-assisted enzymolytic time, enzyme/substrate concentration, and ultrasound specific power were the independent variables, and the purity was the response variable. The Box-Behnken response surface design was also used to optimize the extraction process. Furthermore, the purity, yield, color, and chemical structure of the extracted chlorohemin with response surface optimization were characterized by ultraviolet-visible spectrophotometer, colorimeter, and Fourier transform-infrared spectrometer, respectively. The results showed that ultrasound-assisted enzymolytic time, enzyme/substrate concentration, and ultrasound specific power had significant effects on the purity of chlorohemin extract (P<0.05). The optimal extraction conditions were determined as ultrasound-assisted enzymatic time 4 h, enzyme/substrate concentration 17 U·mg-1, and ultrasound specific power 800 W·L-1 after response surface optimization. The purity of extracted chlorohemin under these conditions was 14.89%, the extraction yield was 63.30%. Compared with the chlorohemin extracted through normal enzymolysis (without ultrasound-assisted treatment) under the same conditions, the yield and purity were increased by 1.29 and 1.07 times (P<0.05), respectively. Moreover, there was not significant difference in chemical structure between these two samples. However, the color of extracted chlorohemin with ultrasound-assisted enzymolysis and response surface optimization was closer to the standard substance of chlorohemin. The ultrasound-assisted treatment (4 h at 800 W·L-1 ultrasound specific power) could significantly improve the purity and yield of chlorohemin extraction from yak blood powder without changing its physicochemical properties.

Key words: yak blood, ultrasound-assisted enzymolysis, chlorohemin, response surface optimization, Fourier transform-infrared spectroscopy

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