探讨使用戊二醛溶液代替甲醛溶液作为前处理剂的最优处理条件,研究了海带褐藻酸钠消化反应前不同处理方法对海带提取率与粘度的影响。比较得出用体积分数2%的戊二醛溶液做前处理剂优于目前工业上应用的体积分数为1%甲醛溶液,超声-微波协同处理所得褐藻酸钠的提取率及黏度最优。对协同处理工艺进行优化,最佳提取条件为:超声功率50 W,微波功率500 W,提取时间60 s,料液比1∶20(g∶mL),提取次数2次。超声-微波协同萃取法与酸处理方法、超声提取方法、微波法相比具有提取效率高、提取时间短的特点。

Different pre-treatment methods on the extraction of sodium alginate were studied and Glutaraldehyde was used as the optimal solution instead of formaldehyde.The results showed that 2%(v/v) glutaraldehyde was superior to formaldehyde as treatment solution.The optimum conditions of extraction were obtained as follows: ultrasonic power 50w,microwave power 500w,extraction for 60s,solid to liquid ratio of 1∶ 20,extraction 2 times.Compared with other extraction methods,the ultrasonic-microwave synergistic extraction was a better method for sodium alginate extraction with less time and higher extraction rate.This is a better method for extracting sodium alginate.