石墨炉原子吸收光谱法测定巴西亚马逊地区鱼类肌肉样本中的汞。
GFAAS determination of mercury in muscle samples of fish from Amazon, Brazil.
机构信息
UNESP - São Paulo State University, Biosciences Institute, Botucatu, SP, Brazil.
出版信息
Food Chem. 2013 Dec 1;141(3):2614-7. doi: 10.1016/j.foodchem.2013.05.008. Epub 2013 May 17.
In the present study, a simple, rapid and sensitive method was developed for the determination of mercury concentrations in the muscle tissue of fish from the Brazilian Amazon using graphite furnace atomic absorption spectrometry (GFAAS) following acid mineralization of the samples in an ultrasonic cold water bath. Using copper nitrate as a chemical modifier in solution and sodium tungstate as permanent modifier, we were able to attain thermal stabilization of the mercury up to the atomisation temperature of 1600 °C in the GFAAS assay. The calculated limits of detection (LOD) and quantification (LOQ) were 0.014 and 0.047 mg kg(-1), respectively.
在本研究中，采用石墨炉原子吸收光谱法（GFAAS），通过在超声冷水浴中对样品进行酸消解，建立了一种简单、快速、灵敏的测定巴西亚马逊地区鱼类肌肉组织中汞浓度的方法。在溶液中使用硝酸铜作为化学修饰剂，并用钨酸钠作为永久性修饰剂，我们能够在 GFAAS 测定中达到汞的热稳定，直至 1600°C 的原子化温度。计算得出的检出限（LOD）和定量限（LOQ）分别为 0.014 和 0.047mgkg(-1)。
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