Emulsification solidified floating organic drop microextraction assisted by ultrasound for the determination of nickel, cobalt and copper in oyster and fish samples,Analytical Methods

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Emulsification solidified floating organic drop microextraction assisted by ultrasound for the determination of nickel, cobalt and copper in oyster and fish samples
Analytical Methods ( IF 2.7 ) Pub Date : 2020/01/07 , DOI: 10.1039/c9ay02453k
Fabio de S. Dias _{1,

2,

3,

4,

5} , Salvador C. de S. R. Neto _{6,

7,

8,

9,

10} , Laís de N. Pires _{2,

11,

12,

13,

14} , Valfredo A. Lemos _{6,

7,

8,

9,

10}

Affiliation

In the present work, solidified floating organic drop microextraction assisted by ultrasound is proposed as the preconcentration system for the determination of trace amounts of nickel, cobalt and copper by FAAS. The main parameters such as pH, concentration of TAN, extraction time, sample and organic phase volume and the nature of the organic solvent were optimized. This system has allowed the determination of nickel, cobalt and copper with a limit of detection (LOD) of 0.03, 0.04 and 0.03 μg g⁻¹ and a limit of quantification (LOQ) of 0.10, 0.13 and 0.10 μg g⁻¹. The precision is expressed as relative standard deviations (R.S.Ds) of 3.2, 2.8 and 2.6 for nickel, copper and cobalt, respectively. Accuracy was confirmed by determination of analytes in the standard reference materials, NIST SRM tomato leaves 1573a and NIST 1577 bovine liver samples, and spike tests, with recoveries ranging from 96 to 104%. The procedure was applied for nickel, cobalt and copper determination in tin oyster and fish samples.

中文翻译：

超声辅助乳化固化悬浮有机液滴微萃取测定牡蛎和鱼肉中镍，钴和铜。

在目前的工作中，建议采用超声辅助的固化漂浮有机液滴微萃取作为通过FAAS测定痕量镍，钴和铜的预浓缩系统。优化了pH，TAN浓度，萃取时间，样品和有机相体积等主要参数以及有机溶剂的性质。该系统可以测定镍，钴和铜，检出限（LOD）为0.03、0.04和0.03μgg ^-1，定量限（LOQ）为0.10、0.13和0.10μgg ^-1。精度表示为镍，铜和钴的相对标准偏差（RSD）分别为3.2、2.8和2.6。通过测定标准参考物质，NIST SRM番茄叶1573a和NIST 1577牛肝样品中的分析物以及加标测试确定准确性，回收率在96％到104％之间。该方法适用于牡蛎和鱼类中锡，镍，钴和铜的测定。

更新日期：2020-02-13

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