Thermospray generation directly into a flame furnace—An alternative to improve the detection power in atomic absorption spectrometry

Bezerra, Marcos Almeida; Lemos, Valfredo Azevedo; Garcia, Jerusa Simone; Silva, Douglas Gonçalves da; Araújo, André Souza; Arruda, Marco Aurélio Zezzi

doi:10.1016/j.talanta.2010.05.002

Cited by 17 publications

(9 citation statements)

References 45 publications

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“…The method developed herein shows comparable results with other, widely and commonly used methods such as ICP‐MS and AAS. A comparison of the reported LODs of the metals by more conventional techniques with the results of this study are given in Table …”

Section: Resultsmentioning

confidence: 91%

Sensitive analysis of metal cations in positive ion mode electrospray ionization mass spectrometry using commercial chelating agents and cationic ion‐pairing reagents

Dodbiba

Wanigasekara

et al. 2012

Rapid Comm Mass Spectrometry

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Metals play a very important role in many scientific and environmental fields, and thus their detection and analysis is of great necessity. A simple and very sensitive method has been developed herein for the detection of metals in positive ion mode ESI-MS. Metal ions are positively charged, and as such they can potentially be detected in positive ion mode ESI-MS; however, their small mass-to-charge (m/z) ratio makes them fall in the low-mass region of the mass spectrum, which has the largest background noise. Therefore, their detection can become extremely difficult. A better and well-known way to detect metals by ESI-MS is by chelating them with complexation agents. In this study eleven different metals, Fe(II), Fe(III), Mg(II), Cu(II), Ru(III), Co(II), Ca(II), Ni(II), Mn(II), Sn(II), and Ag(I), were paired with two commercially available chelating agents: ethylenediaminetetraacetic acid (EDTA) and ethylenediaminedisuccinic acid (EDDS). Since negative ion mode ESI-MS has many disadvantages compared to positive ion mode ESI-MS, it would be very beneficial if these negatively charged complex ions could be detected in the positive mode. Such a method is described in this paper and it is shown to achieve much lower sensitivities. Each of the negatively charged metal complexes is paired with six cationic ion-pairing reagents. The new positively charged ternary complexes are then analyzed by ESI-MS in the positive single ion monitoring (SIM) and single reaction monitoring (SRM) modes. The results clearly revealed that the presence of the cationic reagents significantly improved the sensitivity for these analytes, often by several orders of magnitude. This novel method developed herein for the detection of metals improved the limits of detection (LODs) significantly when compared to negative ion mode ESI-MS and shows great potential in future trace studies of these and many other species.

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Section: Resultsmentioning

confidence: 91%

Sensitive analysis of metal cations in positive ion mode electrospray ionization mass spectrometry using commercial chelating agents and cationic ion‐pairing reagents

Dodbiba

Wanigasekara

et al. 2012

Rapid Comm Mass Spectrometry

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“…The other application could be for volatile species generation of transition metals that applies much more corrosive conditions in the tube given by high aerosol carryover from the generator. The use of the sapphire tube for the thermospray ame furnace AAS could be also a very feasible alternative to commonly used metallic tubes 43 that can also suffer from corrosion in the presence of strong mineral acids. 44 In conclusion, the sapphire tube promises to be a (much) better alternative to quartz for use in the atomizers of volatile species.…”

Section: Discussionmentioning

confidence: 99%

A sapphire tube atomizer for on-line atomization and in situ collection of bismuthine for atomic absorption spectrometry

Musil

Dědina

2013

J. Anal. At. Spectrom.

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Sapphire was tested as a new material for volatile species atomizers. Bismuthine was chosen as a convenient model for volatile species. The fundamental approach adopted was to compare the performance of a sapphire-based atomizer with a quartz atomizer in both modes of operation (on-line atomization versus in situ collection) under equal experimental conditions including design and size of both atomizers. Only the temperature range compatible with the quartz atomizers (up to 1000 C) was investigated. The employment of the modular atomizer design made it possible to comply with the principal requirement of the same design and size of both atomizers: both the atomizers differed only in the material of the exchangeable optical tube (a plain tube with a central orifice). No significant difference between quartz and sapphire regarding atomization as well as in situ collection was found and virtually the same analytical characteristics were achieved. Excess of O 2 over H 2 was employed for efficient trapping and efficient and very fast volatilization was achieved by means of auxiliary H 2 . Under optimized conditions the collection efficiencies of 97 AE 3% and 94 AE 4% were achieved for the sapphire and quartz tube, respectively, and the limits of detection of around 30 pg ml À1 were achieved for 1 ml sample volume. The advantages and future prospects of the use of the sapphire tube are highlighted and discussed.

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“…A review article by Bezerra et al [90] covers the recent developments and applications in the production of thermosprays into flame furnaces to improve the analytical sensitivity in atomic absorption. Principles, characteristics, and instrumentation of TS-FF-AAS are discussed.…”

Section: Flame Furnace and Hydride Generationmentioning

confidence: 99%

Old and New Flavors of Flame (Furnace) Atomic Absorption Spectrometry

Dionísio

Jesus

Amais

et al. 2011

International Journal of Spectroscopy

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This paper presents some recent applications of Flame Atomic Absorption Spectrometry (FAAS) to different matrices and samples. The time window selected was from 2006 up to March, 2011, and several aspects related to food, biological fluids, environmental, and technological samples analyses were reported and discussed. In addition, the chemometrics application for FAAS methods development was also taken into account, as well as the use of metal tube atomizers in air/acetylene flame. Preconcentration methods coupled to FAAS were discussed, and several approaches related to speciation, flotation, ionic liquids, among others were discussed. This paper can be interesting for researchers and FAAS users in order to see the state of the art of this technique.

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Thermospray generation directly into a flame furnace—An alternative to improve the detection power in atomic absorption spectrometry

Cited by 17 publications

References 45 publications

Sensitive analysis of metal cations in positive ion mode electrospray ionization mass spectrometry using commercial chelating agents and cationic ion‐pairing reagents

Sensitive analysis of metal cations in positive ion mode electrospray ionization mass spectrometry using commercial chelating agents and cationic ion‐pairing reagents

A sapphire tube atomizer for on-line atomization and in situ collection of bismuthine for atomic absorption spectrometry

Old and New Flavors of Flame (Furnace) Atomic Absorption Spectrometry

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