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首页> 外文期刊>Mikrochimica Acta: An International Journal for Physical and Chemical Methods of Analysis >Contribution to the Development of Indirect Atomic Absorption Methods: Application of the Ion Pair 1,10-phenanthroline-mercury(II)-iodide to Iodide Determination in Water and Infant Formulae Samples
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Contribution to the Development of Indirect Atomic Absorption Methods: Application of the Ion Pair 1,10-phenanthroline-mercury(II)-iodide to Iodide Determination in Water and Infant Formulae Samples

机译：对间接原子吸收方法发展的贡献：离子对1,10-菲咯啉汞（II）-碘化物在水和婴儿配方食品样品中碘化物的测定中的应用

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A method to determine iodide is developed, based on the formation of an ion pair between 1, 10-phenanthroline, mercury(II) and iodide that can be selectively extracted into IBMK. When the IBMK layer is analyzed by electrothermal atomic absorption spectrometry (ETAAS) for mercury, iodide can be quantified too, Parameters related to the preparation of the ion pair and to the measuring process are studied. Thus, 7.2-7.4 reveals to be the best pH interval to carry out the extraction, and 250 and 1000 deg C, respectively, the mineralization and atomization temperatures for mercury determination by ETAAS. The procedure is applied to drinking tap water and commercial infant formulae milk samples. The accuracy of the method has been investigated by means of the analytical recovery for water samples (mean analytical recovery obtained at different concentration levels 98.1%) and by using the certified reference material BCR CRM No 151 Skim Milk Powder (Spiked) for the infant formulae (results within certification interval). The repeatability of the measurements at different concentration levels gave a RSD lower than 10% for both types of samples and the repeatability of the whole procedure for infant formulae shows a RSD of 1.33%. In addition, the limits of detection and quantification were 2.5 #mu#g/L and 8.5 #mu#g/L, respectively, for drinking water and 1.1 #mu#g/g and 3.8 #mu#g/g, respectively, for infant formulae.
机译：根据在1、10-菲咯啉，汞（II）和碘化物之间形成的离子对的形成，开发了一种测定碘化物的方法，该离子对可以选择性地提取到IBMK中。当通过电热原子吸收光谱法（ETAAS）分析IBMK层中的汞时，碘化物也可以定量，研究与离子对制备和测量过程有关的参数。因此，7.2-7.4分别是进行萃取的最佳pH区间，分别为250和1000℃，分别是ETAAS测定汞的矿化温度和雾化温度。该程序适用于饮用自来水和商业婴儿配方奶粉样品。已通过对水样进行分析回收（在不同浓度水平下获得的平均分析回收率达到98.1％），并对婴儿配方奶粉使用经过认证的参考材料BCR CRM No 151脱脂奶粉（加标），研究了该方法的准确性。 （结果在认证间隔内）。在两种浓度的样品中，不同浓度水平下测量的可重复性均使RSD低于10％，婴儿配方奶粉整个过程的可重复性均显示RSD为1.33％。此外，饮用水的检出限和定量限分别为2.5＃mu＃g / L和8.5＃mu＃g / L，分别为1.1＃mu＃g / g和3.8＃mu＃g / g。用于婴儿配方奶粉。

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