A magnetic graphitic carbon nitride as a new adsorbent for simple separation of Ni (II) ion from foodstuff by ultrasound-assisted magnetic dispersive micro solid-phase extraction method

Bahareh Fahimirad, A. Asghari
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引用次数: 16

Abstract

In this research, a magnetic graphitic carbon nitride (g-C3N4-SnFe2O4) was successfully synthesized and utilized as an efficient adsorbent for nickel (Ni2+) separation/extraction from vegetable samples by ultrasound-assisted magnetic dispersive micro solid-phase extraction (UA-M-D-μSPE). After separation and preconcentration step, Ni ions were determined via micro-sampling flame atomic absorption spectrometry (MS-FAAS). A successful synthesis of g-C3N4-SnFe2O4 was investigated by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and vibrating sample magnetometer (VSM). The optimization of adsorption and desorption steps was effectively studied by the on-at-a time method. In addition, under the optimum experimental conditions, the limits of detection (LODs), the linear ranges (LR) and relative standard deviations (RSDs%, for n = 5) were obtained 1.0 μg.L−1, 4.0 ─ 500.0 μg.L−1, and 1.4 respectively.
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磁性石墨氮化碳作为一种新型吸附剂用于超声辅助磁分散微固相萃取法从食品中简单分离Ni (II)离子
本研究成功合成了一种磁性石墨氮化碳(g-C3N4-SnFe2O4),并将其作为超声辅助磁分散微固相萃取(UA-M-D-μSPE)从蔬菜样品中分离/提取镍(Ni2+)的高效吸附剂。经过分离和预富集步骤,采用微进样火焰原子吸收光谱法(MS-FAAS)测定镍离子。采用傅里叶变换红外光谱(FT-IR)、x射线衍射(XRD)、场发射扫描电镜(FE-SEM)和振动样品磁强计(VSM)对g-C3N4-SnFe2O4的成功合成进行了研究。采用on-at-a - time法对吸附和解吸步骤进行了优化研究。此外,在最佳实验条件下,检测限(lod)、线性范围(LR)和相对标准偏差(rsd %, n = 5)均为1.0 μg。L−1,4.0─500.0 μg。L−1,1.4。
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