Pretreatment method for extracting saxitoxin from aquatic products

The invention discloses a pretreatment method for extracting saxitoxin from aquatic products. The pretreatment method comprises the following steps: (1) washing the aquatic products and homogenizing; (2) adding the sample homogenized in the step (1) into a solvent, extracting, and taking supernate, the solvent being an acetonitrile aqueous solution; (3) freezing the supernate in the step (2), then taking the supernate, and removing the solvent for detection; the saxitoxin is fat-soluble saxitoxin okadaic acid, a spiral imine compound, dinocystin 1, dinocystin 2 and/or propolydinocystin 1; the method is simple in step, small in organic reagent dosage, low in detection cost and suitable for pretreatment of large-batch samples. 本发明公开了一种提取水产品中贝类毒素的前处理方法，包括以下步骤：(1)将水产品清洗后均质；(2)取步骤(1)均质后的样品加入溶剂中萃取，取上清液，所述溶剂为乙腈水溶液；(3)将步骤(2)的上清液冷冻，然后取上清液，去除溶剂，待测；所述贝类毒素为脂溶性贝类毒素大田软海绵酸、螺旋形亚胺化合物、鳍藻毒素1、鳍藻毒素2和/或原多甲藻酸毒素1；该方法步骤简单，有机试剂用量少，检测成本低，适用于大批量样品前处理。