响应面法坛紫菜类菌孢素氨基酸(MAAs)超声辅助提取工艺优化

Optimization of Ultrasound-Assisted Extraction Process for Mycosporine-Like Amino Acids (MAAs) from Pyropia haitanensis by Response Surface Methodology (RSM)

摘要: 为优化坛紫菜(Pyropia haitanensis)中类菌孢素氨基酸(Mycosporine-like Amino Acids, MAAs)的提取工艺，采用响应面法系统优化超声提取工艺参数，重点考察超声能量密度(35%~45%)、提取时间(30~90 min)及料液比(1:25~1:45 g·mL⁻¹)对提取效果的影响，并通过高效液相色谱–质谱联用(High Performance Liquid Chromatography-tandem Mass Spectrometry, HPLC-MS/MS)对MAAs组分进行分离鉴定。结果表明，坛紫菜中主要含有Shinorine和Porphyra-334两种特征性MAAs，均具有典型的紫外吸收特性；确定的最佳提取工艺条件为：以39%乙醇为提取溶剂，在35℃恒温水浴环境下，按1:35的料液比混合，采用500 W功率超声(能量密度40%)连续处理60 min，此时MAAs得率可达14.63% ± 0.32%。与传统水提法相比，该工艺不仅使提取时间缩短33.3%，溶剂消耗量降低20%，还显著提升了得率17.3% (P < 0.05)。该超声辅助提取工艺为MAAs在防晒化妆品及功能食品领域的应用提供参考。

Abstract: To optimize the extraction process of Mycosporine-like Amino Acids (MAAs) from Pyropia haitanensis, response surface methodology was employed to systematically optimize the ultrasonic extraction parameters. The effects of ultrasonic energy density (35%~45%), extraction time (30~90 min), and solid-liquid ratio (1:25~1:45 g·mL⁻¹) on extraction efficiency were focused on, and the MAA components were separated and identified by High-Performance Liquid Chromatography-tandem Mass Spectrometry (HPLC-MS/MS). The results showed that Pyropia haitanensis mainly contained two characteristic MAAs, namely Shinorine and Porphyra-334, both of which exhibited typical ultraviolet absorption properties. The optimal ultrasonic extraction conditions were determined as follows: 39% ethanol as the extraction solvent, mixing the sample with the solvent at a solid-liquid ratio of 1:35 in a constant temperature water bath at 35˚C, and continuous ultrasonic treatment at 500 W power (corresponding to 40% energy density) for 60 min. Under these conditions, the MAA yield reached 14.63% ± 0.32%. Compared with the traditional water extraction method, this process not only shortened the extraction time by 33.3% and reduced the solvent consumption by 20%, but also significantly increased the MAA yield by 17.3% (P < 0.05). This ultrasonic-assisted extraction process provides a reference for the application of MAAs in the fields of sunscreen cosmetics and functional foods.