火焰原子吸收法检测虾夷扇贝不同部位中重金属镉

Detection of cadmium using flame atomic absorption spectroscopy in different parts of Patinopecten yesoensis

目的研究贝类不同部位重金属镉的分布情况。方法以虾夷扇贝为研究对象,采用火焰原子吸收法进行检测,系统研究了扇贝丁、扇贝鳃、扇贝内脏、扇贝边中重金属镉分布情况。结果火焰原子吸收法检出限为0.007 mg/L,线性范围为0.1~0.8 mg/L,仪器相对标准偏差(relative standard deviation,RSD)为0.4%,该方法的检出限、线性范围、精密度等指标均满足贝类样品的测定要求。贝类不同部位中的镉含量依次为扇贝内脏】扇贝鳃】扇贝边】扇贝丁,扇贝丁中重金属镉含量低于国家限量标准2 mg/kg(GB 2762-2012),扇贝边存在部分样品含量大于2 mg/kg,扇贝鳃和扇贝内脏含量均大于2 mg/kg,扇贝内脏含量最高(在9.22~62.50 mg/kg范围内)。结论本研究为虾夷扇贝食品安全性评价提供基础数据,对贝类产品安全性的科研、管理工作具有一定参考意义。建议食用虾夷扇贝时去除内脏。

Objective To investigate the distribution of cadmium in different positions of thePatinopec-ten yesoensis.Methods ThePatinopecten yesoensis was chosen as the research object, which was systemi-cally studied for the distribution of heavy metal cadmium in scallop adductor, scallop gill, scallop skirt and scallop viscera by flame atomic absorption spectroscopy (FABS).Results The detection limit of FABS achieved 0.007 mg/L, the linear range of FABS was 0.1~0.8 mg/L, and relative standard deviation (RSD) of in-strument was 0.4%. The detection limit, linear range, accuracy and other parameters of FABS fulfilled thePa-tinopecten yesoensis sample detection requirements. The cadmium content in different parts ofPatinopecten yesoensis by descending order was scallop viscera>scallop gill>scallop skirt>scallop adductor. The cadmium content of scallop adductor was lower than 2 mg/kg(the standard of GB 2762-2012), the cadmium content of scallop skirt partly exceeded 2 mg/kg, all of scallop gill and the scallop viscera exceeded 2 mg/kg. The highest content of cadmium was scallop viscera (range from 9.22 to 62.50 mg/kg).ConclusionThis paper provided scientific data for shellfish safety researchers and management department, and also offer some essential sug-gestion for thePatinopecten yesoensis food safety evaluation. We recommend eating the evisceratedPatino-pecten yesoensis.