A possible steady state kinetic model for the atomization process during flame atomic spectrometry: Application to atomization interference effects of aluminum on Group II elements

Zaranyika, Mark F.; Chirenje, Albert T.

doi:10.1007/s002160051325

Cited by 3 publications

(4 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although most portable water supplies contain little strontium, levels as high as 39 mg/L have been detected in well water (APHA, 1992). FAAS and ICP-AES are the preferred methods for determining Gp II elements including Mg. Signal enhancement and/or depression were reported previous when Gp II elements were determined by atomic absorption spectrometry in the presence of other Gp II elements as interferents by several authors (Zadgorska and Krasnobaeva, 1977;Czobik and Matousek, 1978;Kos'cielniak and Parczewski, 1982;Smith and Browner, 1984;Zaranyika and Chirenje, 1999). Our approach to the study of interelement effects in atomic spectrometry involves a technique of probing changes in the number densities of the excited and ground states.…”

Section: Introductionmentioning

confidence: 83%

Interference Effects of Excess Ca, Ba and Sr on Mg Absorbance During Flame Atomic Absorption Spectrometry: Characterization in Terms of a Simplified Collisional Rate Model

Zaranyika¹,

Chirenje²,

Mahamadi³

2012

Atomic Absorption Spectroscopy

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 83%

Interference Effects of Excess Ca, Ba and Sr on Mg Absorbance During Flame Atomic Absorption Spectrometry: Characterization in Terms of a Simplified Collisional Rate Model

Zaranyika¹,

Chirenje²,

Mahamadi³

2012

Atomic Absorption Spectroscopy

View full text Add to dashboard Cite

“…The argon (99.95%) was supplied from a pressurized tank (BOC GAS Ltd, Harare, Zimbabwe): The outer gas was supplied at 14 L min 21 , power 1.0 kW, nebulizer pressure 40 psi (280 KPa), and auxiliary gas at 1 L min 21 . Under these conditions, the excitation temperature is between 7000 K and 9000 K. [22] Mg(II), Ca(II), and Sr(II) line emission signals were recorded at 279.6, 393.3, and 407.8 nm respectively.…”

Section: Icp Equipmentmentioning

confidence: 99%

“…Direct charge transfer between analyte and interferent has also been suggested for systems in the air-acetylene flame, [20,21,33] whereby the interferent catalyzed the ionization of analyte atoms for subsequent excitation via radiative recombination. The current work suggests that direct analyte excitation via collisional charge transfer with activated interferent atoms is possible.…”

Section: Interference Effects 845mentioning

confidence: 99%

“…The major problem associated with this classic approach lies in the complexity of the models such that arriving at solutions is difficult. In previous work, [20,21] we proposed a simplified model that focuses on only one particular electronic level. Along with the simplified model, we proposed a novel method for probing changes in the number density of the analyte excited state, n u , based on determining the analyte emission (I) signal ratio I 0 /I, where the prime denotes presence of interferent, and comparing with theoretical values derived assuming a simplified rate model based on steady-state kinetics in the plasma.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interference Effects from Easily Ionizable Elements in Flame AES and ICP‐OES: A Proposed Simplified Rate Model Based on Collisional Charge Transfer Between Analyte and Interferent Species

Zaranyika

Chirenje

Mahamadi

2007

Spectroscopy Letters

View full text Add to dashboard Cite

The effects of excess Na and K on K and Mg atom line emission in the airacetylene flame and of excess Li and K on Ca, Mg, and Sr atom and ion lines in inductively coupled plasma spectroscopy were studied using emission signal ratios, I 0 /I as probes, where I 0 and I are the emission readings in the presence and absence of the interferent respectively. The I 0 /I plots as a function of analyte concentration in the test solution for the ICP experiments were similar to those obtained for the flame experiments in the analytical range 0 -10 mg/L. A simplified rate model based on analyte excitation via charge transfer between analyte ions and activated interferent atoms is proposed to account for the emission signal enhancement observed at low analyte concentrations (,1 mg/L) for both ICP-AES and flame atomic emission spectroscopy (AES). Data are presented showing good agreement between experimental E 0 calibration curves and theoretical E 0 calibration curves computed using the simplified rate model.

show abstract

Advances in atomic absorption and fluorescence spectrometry and related techniques

Evans

Dawson²,

Fisher

et al. 1999

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

Atomic absorption spectrometry 1.5.4 Validation of methodology 2 Atomic fluorescence spectrometry 1.1 Flame atomization 1.1.1 Sample introduction 2.1 Discharge-excited atomic fluorescence 2.2 Laser-excited atomic fluorescence 1.1.1.1 Transport/nebulization 1.1.1.2 Tube-in-flame/atom trapping techniques 3 Laser-based spectroscopy 4 References 1.1.2 Interference studies 1.1.3 Sample introduction by flow injection 1.1.4 Sample pretreatment T his review follows on from last year's1 and describes the 1.1.5 Chromatographic detection 1.2 Electrothermal atomization developments in atomic absorption and fluorescence spectrometry since that time. Included in this review are 1.2.1 Atomizer design and surface modification 1.2.1.1 Graphite atomizers fundamental processes and instrumentation in the areas of atomic absorption and atomic fluorescence spectrometry, 1.2.1.2 Metal atomizers and metallic coatings 1.2.2 Sample introduction together with advances in related techniques such as atomic magneto-optical rotation spectrometry and laser enhanced 1.2.2.1 Slurry and solid sampling 1.2.2.2 Gas sampling ionization. T he review of atomic emission spectrometry may be found in ref. 2. 1.2.2.3 Coupled techniques and preconcentration 1.2.2.4 Electrodeposition Once again, to aid the reader, some of the sub-headings have been modified to reflect the material presented in this year's 1.2.3 Fundamental processes 1.2.4 Interferences review, although the general format is the same as in previous years. 1.2.4.1 Spectral interferences 1.2.4.2 Chemical modifiers-general Comments on the review and suggestions for improvements are welcomed by the review coordinator. 1.2.4.3 Chemical modifiers-palladium 1.2.4.4 Other chemical modifiers 1.2.5 Developments in technique 1 Atomic absorption spectrometry 1.3 Chemical vapour generation 1.3.1 Hydride generation This annual ASU review is based on information selected from 1.3.1.1 General studies of fundamentals, techniques and a database containing approximately 4000 references to analytinstrumentation ical atomic spectrometry. An overview of atomic spectroscopic 1.3.1.2 Determination of individual elements databases available on the World Wide Web has been prepared 1.3.2 Mercury by cold vapour generation by Wiese.3 General reviews of atomic spectroscopy which 1.3.3 Volatile organic compound generation and metal include AAS and AFS have been published by Jackson and vapour separation Lu (531 refs.)4 and He and Shu (378 refs.).5 1.4 Spectrometers One of the most interesting developments reported for some 1.4.1 Light sources time has been the detection of atomic absorption in aqueous 1.4.2 Continuum source and multi-element AAS solution by Panichev and Sturgeon.6 Dilute solutions of NaBH 4 1.4.3 Background correction (0.0025%) were merged with ppm solutions of Ag, Cu and Pd 1.4.4 Detectors in a custom-built spectrophotometric flow cell mounted in 1.5 Chemometrics and computerization place of the burner in an AA spectrophotometer. A back-1.5.1 Calibration ground corrected AA signal was detected during the ...

show abstract

A possible steady state kinetic model for the atomization process during flame atomic spectrometry: Application to atomization interference effects of aluminum on Group II elements

Cited by 3 publications

References 1 publication

Interference Effects of Excess Ca, Ba and Sr on Mg Absorbance During Flame Atomic Absorption Spectrometry: Characterization in Terms of a Simplified Collisional Rate Model

Interference Effects of Excess Ca, Ba and Sr on Mg Absorbance During Flame Atomic Absorption Spectrometry: Characterization in Terms of a Simplified Collisional Rate Model

Interference Effects from Easily Ionizable Elements in Flame AES and ICP‐OES: A Proposed Simplified Rate Model Based on Collisional Charge Transfer Between Analyte and Interferent Species

Advances in atomic absorption and fluorescence spectrometry and related techniques

Contact Info

Product

Resources

About