Chemical interferences in hydride-generation atomic spectrometry

Kumar, A. Ramesh; Riyazuddin, P.

doi:10.1016/j.trac.2009.12.002

Cited by 63 publications

(38 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reagents used in sample preparation step can also interfere with the formation and release of arsenic hydride. [16][17][18] In this work, a method for arsenic determination in mineral fertilizers by using continuous flow HG-AAS (CF-HG-AAS) was developed, combining sample decomposition procedure with diluted acid and digester block with PFA vessels.…”

Section: Introductionmentioning

confidence: 99%

Strategy of Sample Preparation for Arsenic Determination in Mineral Fertilizers

Machado¹,

Pereira-Filho²,

Nogueira³

2016

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

A method for determination of arsenic in mineral fertilizers by continuous flow hydride generation atomic absorption spectrometry (CF-HG-AAS) was developed by using diluted acid and digester block with perfluoroalkoxy (PFA) tubes to sample preparation. An additional sample preparation procedure using microwave-assisted digestion was evaluated and compared with the proposed procedure. A full factorial design was applied to investigate the effect of the variables and the best conditions found were 7 mol L −1 HNO 3 + 30% (m/m) H 2 O 2 as reagents, 4 h of digestion and concentration of reagents diluted 1:1. The effect of concomitants on the analytical signal of arsenic was investigated and no one significant interference was observed, with recoveries ranged from 97 to 103%. The accuracy of proposed method was evaluated by certified reference material (NIST SRM 695) and recovery of 95% was obtained. The arsenic concentration (8.9 ± 0.2 mg kg −1 ) found in the fertilizer is below of maximum concentration established by Brazilian legislation.

show abstract

Section: Introductionmentioning

confidence: 99%

Strategy of Sample Preparation for Arsenic Determination in Mineral Fertilizers

Machado¹,

Pereira-Filho²,

Nogueira³

2016

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

show abstract

“…Hydride generation inductively coupled plasma atomic emission spectrometer is a sensitive tool for the determination of elements such as As, Bi, Sb, and Sn [22,23]. This involves a hydride generation device coupled with atomic spectrometry.…”

Section: Introductionmentioning

confidence: 99%

“…This involves a hydride generation device coupled with atomic spectrometry. Usually, there are a few main steps in the system: (1) generation of hydride, (2) collection of hydride, (3) transfer of the hydride, (4) atomization and excitation of the hydride and (5) detection of the signals [17,18,23]. …”

Section: Introductionmentioning

confidence: 99%

“…This enables reducing or even eliminating interference and increasing the sensitivity at the same time. However, different kinds of interferences are present, such as chemical and spectral interference [16,22,23]. Chemical interferences can be commonly separated to those in liquid phase and gas phase; for example, transition metals can cause chemical interferences in the liquid phase.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical interferences can be commonly separated to those in liquid phase and gas phase; for example, transition metals can cause chemical interferences in the liquid phase. Several reagents, such as EDTA, thiourea and KI, can be used to reduce chemical interferences, for instance those of transition metals [17,22,23]. Spectral interferences in a hydride generation system, being a consequence of the transport of interfering transition metals to the plasma, are responsible for spectral overlap at some wavelengths [17,22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The determination of antimony and arsenic concentrations in fly ash by hydride generation inductively coupled plasma optical emission spectrometry

Ilander

Väisänen

2011

Analytica Chimica Acta

View full text Add to dashboard Cite

Hydride generation inductively coupled plasma optical emission spectrometry (HG-ICP-OES) was used in the determination of As and Sb concentrations in fly ash samples. The effect of sample pre-treatment reagents and measurement parameters used for hydride generation was evaluated. Due to memory effects observed, the appropriate read delay time was adjusted to 60s resulting in RSDs 0.6% and 2.3% for As and Sb, respectively. The most suitable volumes of pre-reduction reagents for 10 mL of sample were 4 mL of KI/ascorbic acid (5%) and 6 mL of HCl (conc.). The determination of Sb was significantly interfered by HF, but the interference could be eliminated by adding 2 mL of saturated boric acid and heating the samples to 60°C at least 45 min. The accuracy of the method was studied by analyses of SRM 1633b and two fly ash samples with the recovery test of added As and Sb. As high a recovery as 96% for SRM 1633b was reached for As using 193.696 nm with two-step ultrasound-assisted digestion. A recovery rate of 103% was obtained for Sb using 217.582 nm and the pre-reduction method with the addition of 2 mL of saturated boric acid and heating. The quantification limits for the determination of As and Sb in the fly ash samples using two-step ultrasound-assisted digestion followed with HG-ICP-OES were 0.89 and 1.37 mg kg(-1), respectively.

show abstract

Generation of Volatile Compounds for Analytical Atomic Spectroscopy

Dědina

2010

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

The generation of volatile compounds (VCs) is a technique employed for gaseous‐phase sampling as an alternative to the conventional liquid‐phase sampling in all methods of analytical atomic spectroscopy. The technique is currently not only applicable for the determination of mercury and “classical” hydride‐forming elements (arsenic, antimony, bismuth, germanium, lead, selenium, tellurium, and tin) but also for a wide range of other elements including a long list of transition metals. There are several approaches employed for the generation of analytically useful VCs. Generation of VCs involves separation of the analyte from the sample matrix together with high efficiency of analyte transport to the detector which results in exceptional detection power of the method. It offers other important benefits: simple analyte preconcentration and an extension of application to elemental speciation analysis. A brief description of theory, instrumentation, methodology, interferences and approaches to speciation analysis is presented in this article together with a critical discussion of advantages and limitations of the technique.

show abstract

Chemical interferences in hydride-generation atomic spectrometry

Cited by 63 publications

References 85 publications

Strategy of Sample Preparation for Arsenic Determination in Mineral Fertilizers

Strategy of Sample Preparation for Arsenic Determination in Mineral Fertilizers

The determination of antimony and arsenic concentrations in fly ash by hydride generation inductively coupled plasma optical emission spectrometry

Generation of Volatile Compounds for Analytical Atomic Spectroscopy

Contact Info

Product

Resources

About