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A new online pre-concentration system using hydride generation atomic fluorescence spectrometry (HG AFS) for zinc determination in mineral water and isotonic sports drinks
Analytical Methods ( IF 2.7 ) Pub Date : 2020-03-10 , DOI: 10.1039/d0ay00139b Meire Ane Pitta da Costa 1, 2, 3, 4, 5 , Daniel Levi França da Silva 1, 2, 3, 4, 5 , Fernanda de Souza Dias 1, 3, 4, 5, 6 , Aníbal de Freitas Santos Júnior 1, 2, 3, 4, 5 , Walter Nei Lopes dos Santos 1, 3, 4, 5, 6
Analytical Methods ( IF 2.7 ) Pub Date : 2020-03-10 , DOI: 10.1039/d0ay00139b Meire Ane Pitta da Costa 1, 2, 3, 4, 5 , Daniel Levi França da Silva 1, 2, 3, 4, 5 , Fernanda de Souza Dias 1, 3, 4, 5, 6 , Aníbal de Freitas Santos Júnior 1, 2, 3, 4, 5 , Walter Nei Lopes dos Santos 1, 3, 4, 5, 6
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Mineral water and isotonic sports drinks (hydroelectrolytic supplement) are sources of electrolytes, and one among them is zinc, an important microelement for several functions of the body. In this study, a novel on-line preconcentration analytical method was developed and validated using atomic fluorescence spectrometry and chemical vapor generation to determine Zn, in mineral water and isotonic sports drinks employing multivariate optimization. The optimal parameters for the system were: pH = 8.00; [Na2CO3] = 6.5 × 10−3 mol L−1; sample flow = 5.70 mL min−1; flow rate = 8.00 mL min−1; and the elution flow rate was adjusted to 2.40 mL min−1 to obtain the analytical speed. The method to determine zinc in samples showed adequate linearity, repeatability and accuracy. The limits of detection (LOD) and quantification (LOQ) obtained for zinc were 0.03 and 0.09 μg L−1, respectively. Zinc concentration in mineral water and isotonic sports drinks ranged from 29.00 to 78.59 μg L−1. The enrichment factor (88.92) and sampling frequency/samples per hour (51) were obtained. Therefore, the results showed that the developed method is simple, fast, reliable, sensitive and selective for the determination of zinc in mineral water and isotonic sports drinks and can be applied in the control of the chemical and toxicological quality of these foods. Furthermore, the multivariate methodology using the complete factorial design and the Box–Behnken design was adequate for the optimization of the preconcentration system variables that influence the generation of the analytical signal.
中文翻译：
使用氢化物发生原子荧光光谱法（HG AFS）的新型在线预浓缩系统，用于测定矿泉水和等渗运动饮料中的锌
矿泉水和等渗运动饮料（氢电解补充剂）是电解质的来源，其中之一是锌，锌是人体多种功能的重要微量元素。在这项研究中，开发了一种新颖的在线预富集分析方法，并使用原子荧光光谱法和化学蒸气产生法通过多元优化对矿泉水和等渗运动饮料中的Zn进行了验证。该系统的最佳参数为：pH = 8.00；[Na 2 CO 3 ] ＝ 6.5×10 -3 mol L -1；样品流量= 5.70 mL min -1 ; 流速= 8.00 mL min -1 ; 洗脱流速调整为2.40 mL min -1获得分析速度。测定样品中锌的方法显示出足够的线性，可重复性和准确性。锌的检出限（LOD）和定量限（LOQ）分别为0.03和0.09μgL -1。矿泉水和等渗运动饮料中的锌浓度范围为29.00至78.59μgL -1。获得了富集因子（88.92）和每小时采样频率/样本（51）。因此，结果表明所建立的方法简便，快速，可靠，灵敏，选择性强，可用于测定矿泉水和等渗运动饮料中的锌，可用于控制这些食品的化学和毒理学质量。此外，使用完整因子设计和Box-Behnken设计的多元方法足以优化影响分析信号生成的预浓缩系统变量。
更新日期：2020-04-24
中文翻译：
使用氢化物发生原子荧光光谱法（HG AFS）的新型在线预浓缩系统，用于测定矿泉水和等渗运动饮料中的锌
矿泉水和等渗运动饮料（氢电解补充剂）是电解质的来源，其中之一是锌，锌是人体多种功能的重要微量元素。在这项研究中，开发了一种新颖的在线预富集分析方法，并使用原子荧光光谱法和化学蒸气产生法通过多元优化对矿泉水和等渗运动饮料中的Zn进行了验证。该系统的最佳参数为：pH = 8.00；[Na 2 CO 3 ] ＝ 6.5×10 -3 mol L -1；样品流量= 5.70 mL min -1 ; 流速= 8.00 mL min -1 ; 洗脱流速调整为2.40 mL min -1获得分析速度。测定样品中锌的方法显示出足够的线性，可重复性和准确性。锌的检出限（LOD）和定量限（LOQ）分别为0.03和0.09μgL -1。矿泉水和等渗运动饮料中的锌浓度范围为29.00至78.59μgL -1。获得了富集因子（88.92）和每小时采样频率/样本（51）。因此，结果表明所建立的方法简便，快速，可靠，灵敏，选择性强，可用于测定矿泉水和等渗运动饮料中的锌，可用于控制这些食品的化学和毒理学质量。此外，使用完整因子设计和Box-Behnken设计的多元方法足以优化影响分析信号生成的预浓缩系统变量。
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