石墨炉原子吸收光谱法测定水产品中铝

应用微波消解-石墨炉原子吸收光谱法测定水产品中铝的含量，通过多次实验优化实验条件，建立水产品中铝的测定方法，对水产品及标准物质中铝含量进行实样检测，并且对铝的线性范围、最低检测限、回收率、精密度和准确度进行评价验证。结果表明：铝在1.63～40.0μg/L范围内，与其吸光度呈良好的线性关系，线性方程为Y=0.0204X＋0.1461，线性系数r=0.998；铝最低检测限为1.63μg/kg；在鲈鱼、对虾和梭子蟹等水产样品中添加5.00mg/kg的铝溶液，回收率达到100.20%～101.73%，相对标准偏差为3.98%～5.85%；标准物质扇贝中铝含量的检测值在标准物的允许误差范围内。该方法灵敏度高，准确可靠，适合水产品中痕量铝的检测。

Determination of Aluminum in Aquatic Products by Graphite Furnace Atomic Absorption Spectrometry

In order to develop a microwave digestion followed by graphite furnace atomic absorption spectrometry (GFAAS) method to determine aluminum in aquatic products, sample pretreatment and instrumental conditions were optimized. The detection limit of the method was 1.63μg/kg and the linear range was from 1.63 to 40.0μg/L (Y = 0.0204x + 0.1461, r = 0.998). Adding 5.00 mg/kg aluminum solution into perch, prawn and portunid samples, the recoveries were from 100.20% to 101.73%, and the RSDs from 3.98% to 5.85%. The contents in the scallop certified reference material determined by the method were in the allowable range. The method has high sensitivity and accuracy and, consequently is suitable for the determination of aluminum in aquatic products.