Organic and inorganic analysis with laser microprobe mass spectrometry. Part I: Instrumentation and methodology

Vaeck, Luc Van; Struyf, Herbert; Roy, W. Van; Adams, Fred C.

doi:10.1002/mas.1280130302

Cited by 90 publications

(78 citation statements)

References 102 publications

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“…By the principle of TOF-MS, this restricts the measurement to the 'prompt ions', i.e. those formed during the laser pulse [1 ]. The ions which are formed over longer periods after the laser pulse, the so-called post-laser ionization, only give rise to a continuous background.…”

Section: Instrumentationmentioning

confidence: 99%

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Microscopical speciation analysis with laser microprobe mass spectrometry and static secondary ion mass spectrometry

Vaeck

Adriaens

Adams

1998

Spectrochimica Acta Part B: Atomic Spectroscopy

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This paper presents a set of data which compares the potential and limitations of laser microprobe mass spectrometry (TOF-LMMS and FT-LMMS) and static secondary ion mass spectrometry (S-SIMS) for inorganic speciation at a microscopical level. In general LMMS yields prominent signals of adduct ions consisting of the intact molecule combined with a stable ion, which allows a direct identification of the analyte. S-SIMS also yields abundant diagnostic signals to specify the molecular composition. However, adduct ions are not always present, which means that the identification often relies on fingerprinting. Results further indicate that the potential and the application area of S-SIMS and FT-LMMS are complementary to one another.

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Section: Instrumentationmentioning

confidence: 99%

“…Also TOF-LMMS can detect ions with relatively broad initial kinetic energy distributions; FT-LMMS only traps ions with a range of typically 1 eV. The time spent during mass analysis is typically up to 500/~s in TOF-LMMS and over 500 ms in FF-LMMS [1].…”

Section: Lmms For Speciation Analysismentioning

confidence: 99%

Microscopical speciation analysis with laser microprobe mass spectrometry and static secondary ion mass spectrometry

Vaeck

Adriaens

Adams

1998

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…To create an imaging technique, it is not suf®cient to achieve an adequate lateral resolution, but the mass spectral information must be recorded from each point on the sample without operator's intervention. For instance, LMMS yields chemical information on a 1 mm spot, but the critical dependence of the signal intensities on the exact focusing of the laser beam prevents``unattended'' operation except in special cases (Van Vaeck et al, 1994a and1994b).…”

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confidence: 99%

Static secondary ion mass spectrometry (S-SIMS) Part 2: material science applications

Adriaens

Vaeck

Adams

1999

Mass Spectrom. Rev.

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“…Several of these processes, i.e., ionization by cationization or anionization and photoionization in the gas phase, are also responsible for ionization of organic compounds in LD-MS or MALDI-MS experiments [60]. Finally, Jackson et al [66] noted that atomic ions, such as Sn ϩ and O Ϫ , may play some role in cluster formation of (SnO) 0 -5 Sn ϩ , (SnO) 1-6 O Ϫ and (SnO) [2][3][4][5][6] ϩ/Ϫ ion by laser ablation of SnO and SnO 2 tin oxides. These authors suggested that these atomic ion may act as nucleation centers or may react with neutral (SnO) x to produce cluster ions.…”

Section: Model Of Cluster Ion Formation By La-msmentioning

confidence: 99%

“…T he study of ion formation processes by mass spectrometry during inorganic compound laser ablation is not yet fully understood. However, several models have been proposed to describe and explain the laser ablation of inorganic compounds [1][2][3][4][5][6][7]. The interaction of a laser beam with a non-metallic solid induces different processes, leading to ejection of neutral and ionized species into the gas phase.…”

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confidence: 99%

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

Aubriet

Müller

2008

J. Am. Soc. Mass Spectrom.

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Laser ablation of transition-metal oxides have been investigated to better understand the formation processes of inorganic cluster ions. The study of binary oxide mixtures and the relative distribution of the ions produced suggest three salient mechanisms that occur after laser/matter interaction, that function to produce the observed ensemble of ionic species. Molecular recombination reactions, unimolecular dissociation processes, emission of small neutrals, including molecular oxygen from transition-metal oxide samples, or from species expelled in gas phase appear to be a significant mechanism, especially under high laser irradiance conditions. These processes are used to propose a set of pathways to rationalize the envelope of ionic clusters formed under photon bombardment. T he study of ion formation processes by mass spectrometry during inorganic compound laser ablation is not yet fully understood. However, several models have been proposed to describe and explain the laser ablation of inorganic compounds [1][2][3][4][5][6][7]. The interaction of a laser beam with a non-metallic solid induces different processes, leading to ejection of neutral and ionized species into the gas phase. Haglund proposed a qualitative description of these processes [7], which begins with the assumption that laser sputtering could be decomposed into four phases: (1) the absorption of laser energy by one or multiple-photon processes; (2) the conversion of the incident energy through radiative and non-radiative relaxation processes; (3) the ejection of species-atoms, molecules, neutrals, ions, excited species-from the irradiated surface; and (4) the formation and the expansion of a more or less dense plume of neutrals and ions. Two lasermatter interaction regimes have to be considered: the laser desorption (LD) and the laser ablation (LA). It is generally reported that LD results in emission of ions, atoms, and molecules without any substantial disturbance in the surrounding surface. LA implies a largescale disruption of surface and near-surface geometrical and electronic structure. These substantial qualitative differences allowed Haglung to identify desorption with a microscopic, and ablation with a mesoscopic view point. LD and LA have to be viewed as the extremes of a continuum, which ranges from the emission of isolated neutrals or ions in the case of LD to the massive removal of material resulting from the collective effects of multiple photons irradiating the same spatial locale in the case of LA. The phenomenology of LA is thought of in terms of formation of a plume of ejected species, which follows the laws of plasma and gas dynamics, and produces a large number of ionized species. Collisions of ions with neutrals occurring in the gas-phase plume after LA lead to ion-molecule condensation reactions. On the other hand, ions and neutrals possess a significant amount of energy, which can result in dissociation reactions. The length scale associated with laser ablation is on the order of d Х laser ϫv s , where laser is the dur...

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Organic and inorganic analysis with laser microprobe mass spectrometry. Part I: Instrumentation and methodology

Cited by 90 publications

References 102 publications

Microscopical speciation analysis with laser microprobe mass spectrometry and static secondary ion mass spectrometry

Microscopical speciation analysis with laser microprobe mass spectrometry and static secondary ion mass spectrometry

Static secondary ion mass spectrometry (S-SIMS) Part 2: material science applications

Laser ablation mass spectrometry of inorganic transition metal compounds. Additional knowledge for the understanding of ion formation

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