Direct and Combined Methods for the Determination of Chromium, Copper, and Nickel in Honey by Electrothermal Atomic Absorption Spectroscopy
Direct and Combined Methods for the Determination of Chromium, Copper, and Nickel in Honey by Electrothermal Atomic Absorption Spectroscopy
复制标题
电热原子吸收光谱法直接法和组合法测定蜂蜜中的铬、铜和镍
DOI：
10.1021/jf050887o
复制
发表时间：
2005
影响因子：
6.1
通讯作者：
R. M. P. Crecente
中科院分区：
文献类型：
--
作者：
J. Garcı́a;J. García;C. Latorre;S. Martín;R. M. P. Crecente
在目前的工作中，直接测定蜂蜜中的铬，铜，镍的方法，采用实验设计作为优化工具，开发了原子吸收光谱法。一旦建立了各个方法的最佳条件，使用响应面工具优化了三种元素的联合测定的直接方法。在所有情况下，钯用作化学改性剂。蜂蜜被稀释在水、过氧化氢和硝酸中。加入Triton X-100以使基质效应和样品的粘度最小化。所有开发方法的RSD（优于10%）和分析回收率（98 - 103%）均可接受。在四种方法中使用校准图来确定样品中分析物的浓度。组合方法的检出限（Cr、Cu和Ni分别为0.21、0.35和0.37 μg L-1）与单独方法的检出限（LOD = 0.17、0.21、0.33......）相似。
In the present work, direct methods for the determination of chromium, copper, and nickel in honey by electrothermal atomic absorption spectroscopy were developed using experimental design as an optimization tool. Once the optimum conditions for the individual methods were established, a direct method for the combined determination of the three elements was optimized using the response surface tool. Palladium was used as chemical modifier in all cases. Honey was diluted in water, hydrogen peroxide, and nitric acid. Triton X-100 was added to minimize the matrix effect and the viscosity of the sample. The RSD (better than 10%) and the analytical recovery (98−103%) were acceptable for all of the developed methods. Calibration graphs were used in the four methods to determine the concentration of the analytes in the sample. The detection limits of the combined method (0.21, 0.35, and 0.37 μg L-1 for Cr, Cu, and Ni, respectively) were similar to those obtained for the individual methods (LOD = 0.17, 0.21, 0.33...