CO2-effervescence assisted dispersive micro solid-phase extraction based on a magnetic layered double hydroxide modified with polyaniline and a surfactant for efficient pre-concentration of heavy metals in cosmetic samples,Analytical Methods

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CO2-effervescence assisted dispersive micro solid-phase extraction based on a magnetic layered double hydroxide modified with polyaniline and a surfactant for efficient pre-concentration of heavy metals in cosmetic samples
Analytical Methods ( IF 2.7 ) Pub Date : 2020-08-27 , DOI: 10.1039/d0ay01043j
Maryam Rajabi _{1,

2,

3,

4} , Zohreh Mollakazemi _{1,

2,

3,

4} , Maryam Hemmati _{1,

2,

3,

4} , Somayeh Arghavani-Beydokhti _{1,

2,

3,

4}

Affiliation

In this paper, a CO₂-effervescence assisted dispersive micro solid-phase extraction procedure (CO₂-EA-DμSPE) using a magnetic layered double hydroxide modified with polyaniline and a surfactant (Zn–Al–LDH–PA–DBSNa–Fe₃O₄) was applied for the pre-concentration of heavy metals (Ni²⁺, Pb²⁺, Co²⁺, and Cd²⁺). The final analysis of the analytes was carried out by atomic absorption spectroscopy. XRD, FTIR, and SEM studies were used for the characterization of the synthesized nanoadsorbent. For the maximum extraction efficiency, effective factors (including pH, nanoadsorbent dosage, and volume of the eluent) were investigated using the central composite design (CCD) method. Under the optimum conditions, the preconcentration factor was more than 20. The linear ranges for Ni²⁺, Pb²⁺, Co²⁺, and Cd²⁺ were obtained as (5–550), (7–750), (5–500), and (3–100) ng mL⁻¹, respectively. The proposed method provided low detection limits (1.4, 2.1, 1.5, and 0.9 ng mL⁻¹ for Ni²⁺, Pb²⁺, Co²⁺, and Cd²⁺, respectively) and suitable repeatability (relative standard deviation values (RSDs) below 6.1%, n = 6). Finally, the current method was successfully used for the extraction of heavy metals from cosmetic samples.

中文翻译：

基于聚苯胺和表面活性剂改性的磁性层状双氢氧化物的CO2泡腾辅助分散微固相萃取，可有效地对化妆品样品中的重金属进行预浓缩

在本文中，使用磁性层状双氢氧化物经聚苯胺和表面活性剂（Zn–Al–LDH–PA–DBSNa–Fe ₃修饰）的CO ₂泡腾辅助分散微固相萃取程序（CO ₂ -EA-DμSPE）使用O ₄）对重金属（Ni 2 ⁺，Pb 2 ⁺，Co ²⁺和Cd ²⁺）。分析物的最终分析通过原子吸收光谱法进行。XRD，FTIR和SEM研究用于表征合成的纳米吸附剂。为了获得最大的萃取效率，使用中央复合设计（CCD）方法研究了有效因素（包括pH值，纳米吸附剂的用量和洗脱液的体积）。在最佳条件下，预富集系数大于20。Ni 2 ⁺，Pb 2 ⁺，Co ²⁺和Cd ²⁺的线性范围分别为（5-550），（7-750），（5 –500）和（3–100）ng mL ^-1。拟议的方法提供了低检测限（Ni ²⁺为^{1.4、2.1、1.5}和0.9 ng mL ^-1，分别为Pb 2 ⁺，Co ²⁺和Cd ²⁺）和合适的重复性（相对标准偏差（RSD）低于6.1％，n = 6）。最后，当前方法已成功用于从化妆品样品中提取重金属。

更新日期：2020-09-25

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