Direct aerosol introduction/ICP-AES ; Relation between the decreasing rate of particle number density and particle size.

Kawaguchi, Hiroshi; Kamakura, Katsuyoshi; Maeda, Eiji; Mizuike, Atsushi

doi:10.2116/bunsekikagaku.36.7_431

Cited by 11 publications

(9 citation statements)

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“…Single particle detection using ICP-AES [15][16][17][18][19] and ICP-MS 20-30 is a feasible methodology for direct analysis of individual microparticles, [15][16][17]19,[20][21][22][23] nanoparticles, 19,30 colloids [25][26][27][28][29] and cells. 18,24 This detection mode has also been adopted in gold nanoparticle-based immunoassay methods 31 and in combination with trace metal preconcentration onto iron hydroxide particles, 32 as a strategy to improve detection limits.…”

Section: Introductionmentioning

confidence: 99%

“…When one particle is introduced into the ICP, the atoms of the analyte produce a flash of gaseous ions in the plasma, which are measured as a single pulse by the detector. Airborne particles have been introduced in ICPs as dried aerosols, [15][16][17][18][21][22][23]30 whereas aqueous suspensions have been introduced by conventional nebulization, 20,[24][25][26][27][28][29] as well as monodisperse droplets. 19 If just one nanoparticle is introduced into the ICP during the reading time, the number of counts of the pulse is related to the quantity of analyte atoms in the particle, and the frequency of the pulses is proportional to the number concentration of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Selective identification, characterization and determination of dissolved silver(i) and silver nanoparticles based on single particle detection by inductively coupled plasma mass spectrometry

Laborda

Jiménez-Lamana

Bolea

et al. 2011

J. Anal. At. Spectrom.

344

292

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The different behaviours of dissolved silver and silver nanoparticles under ICP-MS single particle detection conditions have been used to differentiate directly between both forms of silver in aqueous samples. Suspensions containing silver nanoparticles at number concentrations below 10^9 L-1 and/or dissolved Ag(I) are introduced into the ICP-MS by conventional pneumatic nebulization and measured with a time resolution of 5 ms. Each silver nanoparticle is converted in the ICP into a packet of ions, which are detected as a single pulse, whose intensity is proportional to the number of silver atoms in the nanoparticle, whereas dissolved silver produces pulses of averaged constant intensity. The frequency plots with respect to the intensity measured for each pulse show independent distributions for dissolved silver and silver nanoparticles, whose profiles are also different (Poisson and lognormal, respectively). Size limits of detection for pure Ag nanoparticles of 18 nm, equivalent to a silver mass of 32 ag, were obtained. Number concentration limits of detection of 1 X 10^4 L-1 can be achieved. A methodological approach for identification, characterization and determination of mass and number concentration of dissolved Ag(I) and silver nanoparticles at environmentally relevant concentrations is presented

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective identification, characterization and determination of dissolved silver(i) and silver nanoparticles based on single particle detection by inductively coupled plasma mass spectrometry

Laborda

Jiménez-Lamana

Bolea

et al. 2011

J. Anal. At. Spectrom.

344

292

View full text Add to dashboard Cite

show abstract

“…The time-resolved ICP-AES technique of single-cell analysis can be considered as a special case of single-particle analysis using ICP-AES [11][12][13] and ICP-MS. [14][15][16][17][18][19][20][21][22] As a particle vaporizes in the ICP, a plume of metal atoms/ions is produced. If one particle or less is introduced into the ICP over the duration of the residence time of the ICP, the ion plumes of individual particles will not overlap in the plasma.…”

Section: Introductionmentioning

confidence: 99%

Time-resolved ICP-MS measurement for single-cell analysis and on-line cytometry

Chan

2010

J. Anal. At. Spectrom.

102

101

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“…The K sp of Fe(OH) 3 of 2.79 Â 10 À39 is also much lower than that of Al(OH) 3 (1.3 Â 10 À33 ). 23 The principle of measurement of the spatially-concentrated analyte ions on Fe(OH) 3 particles as current spikes is similar to that of particle analysis using inductively coupled plasma atomic emission spectrometry (ICP-AES) [24][25][26] and ICP-MS. [27][28][29][30][31][32] The peak area or peak height of each spike is related to the quantity of the analyte on the particle and the frequency of the spikes is proportional to the number density of the particles in the sample. Adequate time resolution is required for the analysis.…”

Section: Introductionmentioning

confidence: 99%

A novel detection scheme of trace elements using ICP-MS

Yau

Chan

2005

J. Anal. At. Spectrom.

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A novel sample modulation method for inductively coupled plasma mass spectrometry (ICP-MS) is presented. Analyte ions (Ba, Cd and La) are spatially concentrated onto Fe(OH) 3 particles of size of 10 2 nm. The particles in the original aliquot were introduced into ICP-MS for time-resolved measurement. The spatially concentrated analyte ion on each Fe(OH) 3 particle produces a plume of gaseous analyte ions in the ICP. The plume is detected as a current spike in the mass spectrometer. Time-resolved measurement using the time-resolved analysis (TRA) mode of the ICP-MS and a digital oscilloscope showed ICP-MS current spikes corresponding to the preconcentrated analyte of original concentration of 1 pg mL À1 to 1 ng mL À1 . The full width at half maximum (FWHM) of the current spikes of the adsorbed analyte is of the same order of magnitude as that of the Fe(OH) 3 particles. Enhancement in signal-to-background ratio by the spatial preconcentration-sample modulation method enables the detection of ultra-trace metal (opg mL À1 ) using ICP-MS. The detection limit of Ba is 0.05 pg mL À1 . Using ICP-MS TRA measurement, the log-log plot of the sum of spike intensity of Ba in a Ba-Fe(OH) 3 mixture versus Ba concentration is linear from 1 to 100 pg mL À1 . A novel method to generate the Fe(OH) 3 particles by spraying Fe(NO 3 ) 3 solution onto a basic receiving solution is also presented.

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Direct aerosol introduction/ICP-AES ; Relation between the decreasing rate of particle number density and particle size.

Cited by 11 publications

References 0 publications

Selective identification, characterization and determination of dissolved silver(i) and silver nanoparticles based on single particle detection by inductively coupled plasma mass spectrometry

Selective identification, characterization and determination of dissolved silver(i) and silver nanoparticles based on single particle detection by inductively coupled plasma mass spectrometry

Time-resolved ICP-MS measurement for single-cell analysis and on-line cytometry

A novel detection scheme of trace elements using ICP-MS

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