scholarly journals Determination of trace amounts of Pd(II) and Rh(III) ions in Pt–Ir alloy and road dust samples by flame atomic absorption spectrometry after simultaneous separation and preconcentration on non-modified magnetic nanoparticles

2011 ◽  
Vol 18 (6) ◽  
pp. 1636-1642 ◽  
Author(s):  
S.Z. Mohammadi ◽  
M.A. Karimi ◽  
H. Hamidian ◽  
Y.M. Baghelani ◽  
L. Karimzadeh
Keyword(s):  
Magnetic Nanoparticles ◽  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Road Dust ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption ◽  
Separation And Preconcentration ◽  
Simultaneous Separation ◽  
Modified Magnetic Nanoparticles

scholarly journals Determination of Trace Amounts of Pd(II) Ions in Water and Road Dust Samples by Flame Atomic Absorption Spectrometry After Preconcentration on Modified Organo Nanoclay

2010 ◽  
Vol 93 (6) ◽  
pp. 1952-1956 ◽  
Author(s):  
Daryoush Afzali ◽  
Ali Mostafavi ◽  
Zahra Afzali
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Road Dust ◽  
Absorption Spectrometry ◽  
Sample Volume ◽  
Solid Sorbent ◽  
Flame Atomic Absorption ◽  
Separation And Preconcentration

Abstract This paper describes the application of organo nanoclay, an easily prepared and stable solid sorbent, to the preconcentration of trace amounts of palladium ions in aqueous solution. The organo nanoclay was prepared by adding tetradecyldimethylbenzylamonium chloride onto montmorillonite, which was then modified with 1-(2-pyridylazo)-2-naphthol. The modified nanoclay was used as a solid sorbent for separation and preconcentration of trace amounts of Pd(II) ions, and a simple, sensitive, and economical method was developed for determination of trace amounts of palladium by flame atomic absorption spectrometry. The sorption of Pd(II) ions was quantitative in the pH range of 1.55.0, whereas quantitative desorption occurred with 5.0 mL of a mixture containing 1.0 M thiourea and 1.0 M HCl. The RSD of the method was 2.1 (n = 10; concn = 0.5 g/mL), and the LOD (3bl; = SD and bl = blank) was 0.1 ng/mL. The calibration curve was linear for concentrations of 0.58.0 g/mL in the initial solution, and the preconcentration factor was 140. The maximum capacity of the sorbent was 2.4 mg Pd(II)/g modified organo nanoclay. The influences of the experimental parameters, including sample pH, eluant volume, eluant type, sample volume, and interfering ions, on the recoveries of the palladium ion were investigated. The proposed method was applied to the preconcentration and determination of palladium in different samples.

Study on the Adsorption Behavior of Chrome and Manganese on Potassium Tetratitanate Whisker

2012 ◽  
Vol 534 ◽  
pp. 126-130 ◽  
Author(s):  
Song Mei Wang ◽  
Lu Kuan Liu ◽  
Wan Zhen Xu
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Environmental Samples ◽  
Absorption Spectrometry ◽  
Adsorption Behavior ◽  
Real Samples ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Separation And Preconcentration

A new method for the separation and preconcentration of Chrome and Manganese using potassium titrationate whisker was developed prior to the determination by FAAS. The influences of analytical parameters including amount of sorbent, the adsorption capacity, the coexistence ion influence and the adsorption behavior were also studied by the flame atomic absorption spectrometry, the effects of concomitant ions were also examined. The detection limits (3s) were 15ng•mL-1 and 44 ng•mL-1. The method was applied to the determination of analytes in real samples, such as tea and environmental samples, etc. and good results were obtained(relative standard deviations93%).

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