scholarly journals ICP-AES Determination of Trace Rare Earth Elements in Environmental and Food Samples by On-line Separation and Preconcentration with Acetylacetone-modified Silica Gel Using Microcolumn

2007 ◽  
Vol 23 (8) ◽  
pp. 997-1002 ◽  
Author(s):  
Nan ZHANG ◽  
Chaozhang HUANG ◽  
Bin HU
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Silica Gel ◽  
Food Samples ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Separation And Preconcentration ◽  
On Line ◽  
Line Separation

Preparation of Adsorbents Based on Dendrimer Modified Silica Gel and its Adsorption Performances for Lead

2013 ◽  
Vol 800 ◽  
pp. 166-172
Author(s):  
Xiong Zhi Wu ◽  
Li Li ◽  
Fei Ping Li ◽  
Wen Ying Jin
Keyword(s):  
Standard Deviation ◽  
Relative Standard Deviation ◽  
Silica Gel ◽  
Limit Of Detection ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Separation And Preconcentration

A new sorbent (PAMAM4.0GASG) with gallic acid as functional group has been prepared based on G4.0 polyamidoamine dendrimer modified silica gel (PAMAM4.0SG) and characterized with FTIR. It was employed for selective separation, preconcentration and determination of lead in different samples by flame atomic absorption spectrometry (FAAS). Experimental conditions for effective separation and preconcentration of lead were optimized. The preconcentration factor reaches 200 for lead. The relative standard deviation (R.S.D.) under optimum conditions was 2.1% for 5.0 μg ml1 of Pb (II).The relative standard deviation (R.S.D.) was 2.1% for 5.0 μg ml1 of Pb (II). The limit of detection (LOD) of 0.081μg ml1 was achieved with a sample loading flow rate of 4.2 ml min1 and a 10 ml sample volume in the proposed method. The proposed column enrichment method was applied for the preconcentration/separation and determination of Pb (II) in tap water and river water samples successfully.

FAAS Determination of Platinum Using an On-Line Separation and Preconcentration System with a Polymelamine Dendrimer Immobilized Silica Gel

2003 ◽  
Vol 36 (10) ◽  
pp. 2229-2241 ◽  
Author(s):  
Xiongzhi Wu ◽  
Peng Liu ◽  
Qiaosheng Pu ◽  
Zhixing Su
Keyword(s):  
Silica Gel ◽  
Separation And Preconcentration ◽  
On Line ◽  
Line Separation

Separation of rare earth elements by high performance liquid chromatography using a covalent modified silica gel column

2001 ◽  
Vol 439 (2) ◽  
pp. 247-253 ◽  
Author(s):  
R. Garcia-Valls ◽  
A. Hrdlicka ◽  
J. Perutka ◽  
J. Havel ◽  
N.V. Deorkar ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Silica Gel ◽  
High Performance ◽  
Modified Silica ◽  
Modified Silica Gel

scholarly journals Determination of Cadmium in River Water Samples by Flame AAS after On-line Preconcentration in Mini-Column Packed with 2-Aminothiazole-modified Silica Gel

2004 ◽  
Vol 20 (7) ◽  
pp. 1029-1032 ◽  
Author(s):  
Ilton L. ALCÂNTARA ◽  
Paulo S. ROLDAN ◽  
Gustavo R. CASTRO ◽  
Fabrício V. MORAES ◽  
Fábio A. SILVA ◽  
...  
Keyword(s):  
River Water ◽  
Silica Gel ◽  
Water Samples ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
River Water Samples ◽  
On Line

scholarly journals The Solid Phase Extraction of Some Metal Ions Using Palladium Nanoparticles Attached to Silica Gel Chemically Bonded by Silica-Bonded N-Propylmorpholine as New Sorbent prior to Their Determination by Flame Atomic Absorption Spectroscopy

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
M. Ghaedi ◽  
M. Rezakhani ◽  
S. Khodadoust ◽  
K. Niknam ◽  
M. Soylak
Keyword(s):  
Electron Microscopy ◽  
Metal Ions ◽  
Silica Gel ◽  
Solid Phase ◽  
Food Samples ◽  
Natural Food ◽  
Modified Silica Gel ◽  
Flame Atomic Absorption ◽  
Relative Standard

In this research at first palladium nanoparticle attached to a new chemically bonded silica gel has been synthesized and has been characterized with different techniques such as X-ray diffraction (XRD), fourier transform infrared (FT-IR), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). Then, this new sorbent (chemically modified silica gel with N-propylmorpholine (PNP-SBNPM)) was efficiently used for preconcentration of some metal ions in various food samples. The influence of effective variables including mass of sorbent, flow rate, pH of sample solutions and condition of eluent such as volume, type and concentration on the recoveries of understudy metal ions were investigated. Following the optimization of variables, the interfering effects of some foreign ions on the preconcentration and determination of the investigated metal ions described. At optimum values of variables, all investigated metal ions were efficiently recovered with efficiency more than 95%, relative standard deviation (RSD) between 2.4 and 2.8, and detection limit in the range of 1.4–2.7 ng mL−1. The present method is simple and rapidly applicable for the determination of the understudied metal ions (ng mL−1) in different natural food samples.

ICP-OES determination of trace metal ions after preconcentration by 4-(8-hydroxy-5-quinolylazo)naphthalenesulfonic acid modified silica gel

2008 ◽  
Vol 891 (1-3) ◽  
pp. 45-49 ◽  
Author(s):  
Xijun Chang ◽  
Haixia Luo ◽  
Yuemei Cui ◽  
Xiangbing Zhu ◽  
Yunhui Zhai ◽  
...  
Keyword(s):  
Trace Metal ◽  
Metal Ions ◽  
Silica Gel ◽  
Icp Oes ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Trace Metal Ions

Determination of Cu, Ni, and Zn in fuel ethanol by FAAS after enrichment in column packed with 2-aminothiazole-modified silica gel

2003 ◽  
Vol 375 (4) ◽  
pp. 574-577 ◽  
Author(s):  
P. S. Roldan ◽  
I. L. Alcântara ◽  
G. R. Castro ◽  
J. C. Rocha ◽  
C. C. F. Padilha ◽  
...  
Keyword(s):  
Silica Gel ◽  
Fuel Ethanol ◽  
Modified Silica ◽  
Modified Silica Gel

On-line separation and preconcentration of hexavalent chromium on a novel mesoporous silica adsorbent with determination by solution-cathode glow discharge-atomic emission spectrometry

2014 ◽  
Vol 29 (12) ◽  
pp. 2315-2322 ◽  
Author(s):  
Jiaxian Ma ◽  
Zheng Wang ◽  
Qing Li ◽  
Rongyin Gai ◽  
Xiaohong Li
Keyword(s):  
Hexavalent Chromium ◽  
Low Cost ◽  
Speciation Analysis ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Separation And Preconcentration ◽  
Silica Adsorbent ◽  
On Line ◽  
Line Separation

A simple, low cost, and accurate speciation analysis method based on on-line SPE and SCGD-AES was developed for the determination of hexavalent chromium in aqueous samples.

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