一种通过火焰原子吸收光谱法测定饮料和生物样品中无机锑形态的新型浊点萃取方法。
A new cloud point extraction procedure for determination of inorganic antimony species in beverages and biological samples by flame atomic absorption spectrometry.
作者信息
Altunay Nail, Gürkan Ramazan
机构信息
University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, TR-58140 Sivas, Turkey.
University of Cumhuriyet, Faculty of Sciences, Department of Chemistry, TR-58140 Sivas, Turkey.
出版信息
Food Chem. 2015 May 15;175:507-15. doi: 10.1016/j.foodchem.2014.12.012. Epub 2014 Dec 9.
A new cloud-point extraction (CPE) for the determination of antimony species in biological and beverages samples has been established with flame atomic absorption spectrometry (FAAS). The method is based on the fact that formation of the competitive ion-pairing complex of Sb(III) and Sb(V) with Victoria Pure Blue BO (VPB(+)) at pH 10. The antimony species were individually detected by FAAS. Under the optimized conditions, the calibration range for Sb(V) is 1-250 μg L(-1) with a detection limit of 0.25 μg L(-1) and sensitive enhancement factor of 76.3 while the calibration range for Sb(III) is 10-400 μg L(-1) with a detection limit of 5.15 μg L(-1) and sensitive enhancement factor of 48.3. The precision as a relative standard deviation is in range of 0.24-2.35%. The method was successfully applied to the speciative determination of antimony species in the samples. The validation was verified by analysis of certified reference materials (CRMs).
已建立一种结合火焰原子吸收光谱法（FAAS）用于测定生物和饮料样品中锑形态的新型浊点萃取（CPE）方法。该方法基于在pH 10条件下，Sb(III)和Sb(V)与维多利亚纯蓝BO（VPB(+)）形成竞争性离子对络合物这一事实。通过FAAS分别检测锑形态。在优化条件下，Sb(V)的校准范围为1 - 250 μg L(-1)，检测限为0.25 μg L(-1)，灵敏增强因子为76.3；而Sb(III)的校准范围为10 - 400 μg L(-1)，检测限为5.15 μg L(-1)，灵敏增强因子为48.3。精密度以相对标准偏差计在0.24 - 2.35%范围内。该方法成功应用于样品中锑形态的测定。通过分析有证标准物质（CRM）验证了该方法的有效性。
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