Determination of trace metals in natural samples by ICP-OES after preconcentration on modified silica gel and on modified silica nanoparticles

2009 ◽  
Vol 165 (3-4) ◽  
pp. 319-327 ◽  
Author(s):  
Lijun Zhang ◽  
Yunhui Zhai ◽  
Xijun Chang ◽  
Qun He ◽  
Xinping Huang ◽  
...  
Keyword(s):  
Trace Metals ◽  
Silica Nanoparticles ◽  
Silica Gel ◽  
Icp Oes ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Modified Silica Nanoparticles

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

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.

scholarly journals Determination of gold, palladium and copper by flame atomic absorption spectrometry after preconcentration on silica gel modified with 3-(2-aminoethylamino)propyl group

2005 ◽  
Vol 3 (2) ◽  
pp. 252-262 ◽  
Author(s):  
Mustafa Imamoglu ◽  
Ali Aydin ◽  
Mustafa Dundar
Keyword(s):  
Silica Gel ◽  
Volume Flow Rate ◽  
Absorption Spectrometry ◽  
Rate Matrix ◽  
Modified Silica ◽  
Modified Silica Gel ◽  
Flame Atomic Absorption ◽  
Ft Ir ◽  
Preconcentration Method

AbstractA preconcentration method of gold, palladium and copper based on the sorption of Au (III), Pd (II) and Cu (II) ions on a column packed with 3-(2-aminoethylamino)propyl bonded silica gel is described. The modified silica gel was synthesized and characterized by FT-IR and C, H, N elemental analysis. At column preconcentration, the effects of parameters such as pH, volume, flow rate, matrix constituents of solutions and type of eluent on preconcentration of gold, palladium and copper were studied. The recoveries of Au (III), Pd (II) and Cu (II) were 98.93±0.51, 98.81±0.36 and 99.21±0.42 % at 95 % confidence level, respectively. The detection limits (δ) of the elements were 0.032, 0.016 and 0.012 μg ml−1, respectively. The preconcentration method was applied for determination of gold and palladium in certified reference material SARM 7B and copper in river and synthetic seawater by FAAS. Gold, palladium and copper were determined with relative error lower than 10 %.

scholarly journals Determination of Cu, Ni and Pb in aqueous medium by FAAS after pre-concentration on 2-aminothiazole modified silica gel

2004 ◽  
Vol 15 (3) ◽  
pp. 366-371 ◽  
Author(s):  
Ilton Luiz de Alcântara ◽  
Paulo dos Santos Roldan ◽  
Maurício A. L. Margionte ◽  
Gustavo R. Castro ◽  
Cilene C. F. Padilha ◽  
...  
Keyword(s):  
Aqueous Medium ◽  
Silica Gel ◽  
Modified Silica ◽  
Modified Silica Gel
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