A sheath gas device was used to show that the measured intensity of single particles depends on t... more A sheath gas device was used to show that the measured intensity of single particles depends on the radial position of the particles in the ICP central channel, which may result in inaccurate particle size determination at low observation positions.
Correlation of the distributions of single-cell ICP-MS intensity and cell properties gives insigh... more Correlation of the distributions of single-cell ICP-MS intensity and cell properties gives insights into heterogeneous cellular responses to external stresses.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 2018
Double-viewing-position single-particle inductively coupled plasma-atomic emission spectrometry (... more Double-viewing-position single-particle inductively coupled plasma-atomic emission spectrometry (DVP-SP-ICP-AES) measures emission intensity at two ICP vertical positions simultaneously using a single photomultiplier tube. A particle travelling up the ICP gives two consecutive temporal emission peaks. The Yb II 328.937-nm emission intensity of the two peaks for single YbO particles of diameter of 200 - 2000 nm are plotted against each other in a correlation plot. The correlation is poor when the gas temperature at the lower observation position is approximately the boiling point of the particles. Poor particle vaporization at the center of the central channel occurs because the gas temperature is 400 K lower than the temperature at the rim. The correlation is improved by shifting the observation positions up or using helium-argon mixed carrier gas to increase the gas temperature. Gas temperature is an important parameter for precise single particle-ICP measurements. DVP-SP-ICP-AES c...
A sheath gas device was used to show that the measured intensity of single particles depends on t... more A sheath gas device was used to show that the measured intensity of single particles depends on the radial position of the particles in the ICP central channel, which may result in inaccurate particle size determination at low observation positions.
Correlation of the distributions of single-cell ICP-MS intensity and cell properties gives insigh... more Correlation of the distributions of single-cell ICP-MS intensity and cell properties gives insights into heterogeneous cellular responses to external stresses.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 2018
Double-viewing-position single-particle inductively coupled plasma-atomic emission spectrometry (... more Double-viewing-position single-particle inductively coupled plasma-atomic emission spectrometry (DVP-SP-ICP-AES) measures emission intensity at two ICP vertical positions simultaneously using a single photomultiplier tube. A particle travelling up the ICP gives two consecutive temporal emission peaks. The Yb II 328.937-nm emission intensity of the two peaks for single YbO particles of diameter of 200 - 2000 nm are plotted against each other in a correlation plot. The correlation is poor when the gas temperature at the lower observation position is approximately the boiling point of the particles. Poor particle vaporization at the center of the central channel occurs because the gas temperature is 400 K lower than the temperature at the rim. The correlation is improved by shifting the observation positions up or using helium-argon mixed carrier gas to increase the gas temperature. Gas temperature is an important parameter for precise single particle-ICP measurements. DVP-SP-ICP-AES c...
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Papers by Ka-Him Chun