A Magnetized Nanoparticle Based Solid-Phase Extraction Procedure Followed by Inductively Coupled Plasma Atomic Emission Spectrometry to Determine Arsenic, Lead and Cadmium in Water, Milk, Indian Rice and Red Tea

Abstract

A sensitive and simple method using magnetic multi-walled carbon nanotube (MWCNTs-FeO MNP), as the adsorbent, has been successfully developed for extraction and pre-concentration of arsenic, lead and cadmium with detection by inductively coupled plasma-atomic emission spectroscopy (ICP-AES). The nanosorbent was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction pattern (XRD), vibrating sample magnetometer (VSM) and transmission electron microscopy (TEM). The key factors affecting the signal intensity such as pH, adsorbent amount, etc. were investigated. Under optimal conditions, the limits of detection (three-time of signal to noise ratio, S/N 3) were 0.3, 0.6, 0.3 ng/mL for arsenic, lead and cadmium, respectively. Application of the adsorbent was investigated by the analysis of water, milk, Indian rice and red tea. The experimental data was analyzed and obeyed Langmuir and Freundlich adsorption models. The kinetic data was fitted to the pseudo-second-order model. Thermodynamic studies revealed the feasibility and exothermic nature of the system.

Metal Nanostructures for Environmental Pollutant Detection Based on Fluorescence

“…In order to monitor the amount of heavy metal ions and pesticides accumulated in nature, a wide range of sample types, such as soil, water, air, food, beverage, plant and animal-derived products, needs to be tested routinely. The most widely used analytical methods to detect the presence of contaminants in real samples are: atomic absorption spectroscopy (AAS) [6,7], atomic emission spectroscopy (AES) [8,9], mass spectroscopy (MS) [10,11] and chromatography methods [12,13]. All of them have excellent sensitivity and reproducibility, however, their protocols for sample preparation are time-consuming [14][15][16][17][18] and they require very expensive and sophisticated apparatuses, handled by welltrained personnel.…”

Ionic liquid functionlized on multiwall carbon nanotubes for nickel and lead determination in human serum and urine samples by micro solid-phase extraction

“…Due to ultra-trace concentration of Pb and Ni in human samples (urine and serum) and difficulty matrices in human biological samples, the sample treatment was used. For Examples, the solid phase extraction(SPE) [25], the magnetic dispersive micro-solid phase extraction (MD-μ-SPE) [26,27], the dispersive micro solid phase microextraction (D-SPME) [28], the needle hub in-syringe solid phase extraction (NHS-SPE) [29], and liquid-liquid microextraction (LLME) [30,31] were used. Among them, the dispersive micro solidphase extraction D-μ-SPE was mostly used for determination of heavy metals such as Ni and Pb in water and humans.…”

Adsorption and determination of Lead in water and human urine samples based on Zn2(BDC)2(DABCO) MOF as polycaprolactone nanocomposite by suspension micro solid phase extraction coupled to UV–VIS spectroscopy

“…Also in another report, cyclodextrin-polycaprolactone titanium dioxide nanocomposites were used as a adsorbent for the removal of lead in aqueous waste samples [39]. The different techniques included, the graphite furnace coupled with atomic absorption spectrometry(GF-AAS) [40], the anodic stripping voltammetry (ASV) [41], the flame atomic absorption spectrometry (F-AAS) [42], the inductively coupled plasma atomic emission spectrometry (ICP-AES) [43] and the UV-Vis were used for lead determination in water samples. In present study, Zn 2 (BDC) 2 (DABCO) MOF/PCL nanocomposites were prepared by a simple method and lead absorption was investigated by MOF and its nanocomposites from aqueous solution at optimized pH.…”