[目的]建立贝类产品中虾夷扇贝毒素(YTX)的液相色谱-四极杆-静电轨道场离子阱高分辨质谱检测方法。[方法]以牡蛎和文蛤为研究对象,样品经甲醇提取,采用QuEChERS净化,经Hypersil GOLD C 18色谱柱分离,乙腈和0.002 mol/L甲酸铵溶液(含0.2...[目的]建立贝类产品中虾夷扇贝毒素(YTX)的液相色谱-四极杆-静电轨道场离子阱高分辨质谱检测方法。[方法]以牡蛎和文蛤为研究对象,样品经甲醇提取,采用QuEChERS净化,经Hypersil GOLD C 18色谱柱分离,乙腈和0.002 mol/L甲酸铵溶液(含0.2%甲酸)为流动相梯度洗脱,负离子全扫描+数据依赖二级扫描,提取一级谱图中准分子离子精确质量数定量,二级质谱图中特征离子精确质量数定性。[结果]虾夷扇贝毒素(YTX)在12 min内出峰,定量限为0.3μg/kg,在9.05~181.00μg/L范围内线性良好,相关系数r=0.9964,回收率96.3%~102.8%,相对标准偏差(RSD)小于14.2%(n=6)。[结论]该研究为贝类毒素监控提供了技术支持。展开更多
An inter-laboratory comparison of the AOAC mouse bioassay for paralytic shellfish poisoning (PSP) toxicity in shellfish was carried out among 25 Chinese laboratories to examine the overall performance for PSP testing ...An inter-laboratory comparison of the AOAC mouse bioassay for paralytic shellfish poisoning (PSP) toxicity in shellfish was carried out among 25 Chinese laboratories to examine the overall performance for PSP testing in China, and to analyze the main factors affecting the performance of this method. The toxic scallop Patinopecten yessoensis collected from coast of Bohai Sea, China, was used as a test sample in the comparison study. The results were reported and evaluated using robust statistical methods. The z scores showed that 80%, 8%, and 12% of laboratories reported satisfactory results, unsatisfactory results, and questionable results, respectively. This evaluation demonstrates that the PSP mouse bioassay is an appropriate method for screening and testing PSP toxicity in shellfish. However, it was found that the experience and skill of technicians, as well as the body weight and health status of mice being used significantly affected the accuracy of the method.展开更多
基金Supported by a thesis research project of General Administration of Quality Supervision, Inspection and Quarantine of China (No. 2010IK168)
文摘An inter-laboratory comparison of the AOAC mouse bioassay for paralytic shellfish poisoning (PSP) toxicity in shellfish was carried out among 25 Chinese laboratories to examine the overall performance for PSP testing in China, and to analyze the main factors affecting the performance of this method. The toxic scallop Patinopecten yessoensis collected from coast of Bohai Sea, China, was used as a test sample in the comparison study. The results were reported and evaluated using robust statistical methods. The z scores showed that 80%, 8%, and 12% of laboratories reported satisfactory results, unsatisfactory results, and questionable results, respectively. This evaluation demonstrates that the PSP mouse bioassay is an appropriate method for screening and testing PSP toxicity in shellfish. However, it was found that the experience and skill of technicians, as well as the body weight and health status of mice being used significantly affected the accuracy of the method.
