文蛤含沙量超声检测法的建立及初步应用

针对目前贝类产品质量安全易受环境影响和体内易存留泥沙等问题，建立一种更适于贝类含沙量测定的方法，为贝类净化提供技术参考和理论指导。以文蛤Meretrix meretrix为研究对象，取3份未经净化的文蛤样品，通过新建立的超声法和常用的比重法对贝肉中含沙量进行测定，对比分析两种测定方法及不同来源文蛤含沙量的差异。结果表明：3份样品经超声法测定导出的含沙量均远高于比重法，约为比重法的7-10倍。因此，超声法更为精准，在测定贝肉中含沙量时，推荐使用超声法。经超声法测定，山东河口海域和山东无棣海域滩涂增养殖的文蛤含沙量分别是浙江乐清池塘养殖文蛤含沙量的45倍和17倍，不同来源文蛤的含沙量差异较大。

Establishment and Preliminary Application of a Ultrasonic Testing Method for Sand Content of Meretrix meretrix

In view of the quality and safety of shellfish products,which are easily affected by the environment and easy to retain sediment in the body,a more suitable method for measuring the sand content of shellfish has been established to provide technical reference and theoretical guidance for shellfish purification.The Meretrix meretrix were taken as the research object in this experiment,and three samples of unpurified M.meretrix were taken to test the sand content in the shellfish meat by the newly established ultrasonic method and the commonly used specific gravity method.The difference in sand content of the two measurement methods and different sources of M.meretrix was compared and analyzed.The results showed that the sand content of the three samples tested by the new method is much higher than another method,which was about 7-10 times of the specific gravity method.The ultrasonic method was more accurate.When measuring the sand content of the shellfish,the ultrasonic method was recommended.According to the ultrasonic method,the sand content of the cultivated M.meretrix in the sea area of Shandong estuary and Wudi sea area of Shandong was 45 and 17 times that of the cultivated M.meretrix in the ponds of Yueqing,Zhejiang,respectively.The M.meretrix of different sources varied greatly in sand content.