Sample introduction with graphite furnace electrothermal vaporization into an inductively coupled plasma

effects of streaming conditions and gaseous phase additives

Research output: Contribution to journalConference article

23 Citations (Scopus)

Abstract

A laboratory-made graphite furnace electrothermal vaporizer (GF-ETV) was applied with two alternative versions of the exit part. In one of the versions the vapor streams upward through the transverse hole of the longitudinally heated tube (upward streaming: UPS), while with the other version the vapor streams toward one of the ends of the tube (end-on streaming: ENS). Volatile (Cd, Zn) and medium volatile elements (Cu, Mg, Mn) were applied in multi-element solutions, in the mass range of 4-10 μg for each analyte. Net line intensities were compared for the two versions, and also for applying toluene or carbon tetrachloride vapor in the furnace atmosphere. Using pure argon as the internal furnace gas, the line intensities of the medium volatile elements Cu and Mg were lower for the ENS than for the UPS by approximately 40%. This was in agreement with findings of other authors for similar systems, and was explained by condensation of vapors on cooler parts of the graphite tube, close to the outlet end. On the other hand, the UPS and ENS provided similar line intensities for Cu and Mg when CCl4 vapor (0.5% v/v) was used in the internal furnace gas as a result of the formation of volatile chlorides, which do not condense in the graphite tube. Recently published transport efficiency data, including our own results, are evaluated with respect of design characteristics, operating conditions, applied analytes and chemical modifiers/carriers.

Original languageEnglish
Pages (from-to)431-448
Number of pages18
JournalSpectrochimica acta, Part B: Atomic spectroscopy
Volume55
Issue number5
DOIs
Publication statusPublished - May 31 2000
EventCSI XXXI Pre-Symposium Electrothermal Atomization and Vaporization Techniques in Atomic Spectroscopy - Nevsehir, Turkey
Duration: Sep 1 1999Sep 4 1999

Fingerprint

Graphite
Inductively coupled plasma
Vaporization
furnaces
Furnaces
graphite
Vapors
vapors
Gas furnaces
tubes
vaporizers
tetrachlorides
Carbon tetrachloride
Carbon Tetrachloride
Argon
carbon tetrachloride
Toluene
outlets
coolers
gases

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

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title = "Sample introduction with graphite furnace electrothermal vaporization into an inductively coupled plasma: effects of streaming conditions and gaseous phase additives",
abstract = "A laboratory-made graphite furnace electrothermal vaporizer (GF-ETV) was applied with two alternative versions of the exit part. In one of the versions the vapor streams upward through the transverse hole of the longitudinally heated tube (upward streaming: UPS), while with the other version the vapor streams toward one of the ends of the tube (end-on streaming: ENS). Volatile (Cd, Zn) and medium volatile elements (Cu, Mg, Mn) were applied in multi-element solutions, in the mass range of 4-10 μg for each analyte. Net line intensities were compared for the two versions, and also for applying toluene or carbon tetrachloride vapor in the furnace atmosphere. Using pure argon as the internal furnace gas, the line intensities of the medium volatile elements Cu and Mg were lower for the ENS than for the UPS by approximately 40{\%}. This was in agreement with findings of other authors for similar systems, and was explained by condensation of vapors on cooler parts of the graphite tube, close to the outlet end. On the other hand, the UPS and ENS provided similar line intensities for Cu and Mg when CCl4 vapor (0.5{\%} v/v) was used in the internal furnace gas as a result of the formation of volatile chlorides, which do not condense in the graphite tube. Recently published transport efficiency data, including our own results, are evaluated with respect of design characteristics, operating conditions, applied analytes and chemical modifiers/carriers.",
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N2 - A laboratory-made graphite furnace electrothermal vaporizer (GF-ETV) was applied with two alternative versions of the exit part. In one of the versions the vapor streams upward through the transverse hole of the longitudinally heated tube (upward streaming: UPS), while with the other version the vapor streams toward one of the ends of the tube (end-on streaming: ENS). Volatile (Cd, Zn) and medium volatile elements (Cu, Mg, Mn) were applied in multi-element solutions, in the mass range of 4-10 μg for each analyte. Net line intensities were compared for the two versions, and also for applying toluene or carbon tetrachloride vapor in the furnace atmosphere. Using pure argon as the internal furnace gas, the line intensities of the medium volatile elements Cu and Mg were lower for the ENS than for the UPS by approximately 40%. This was in agreement with findings of other authors for similar systems, and was explained by condensation of vapors on cooler parts of the graphite tube, close to the outlet end. On the other hand, the UPS and ENS provided similar line intensities for Cu and Mg when CCl4 vapor (0.5% v/v) was used in the internal furnace gas as a result of the formation of volatile chlorides, which do not condense in the graphite tube. Recently published transport efficiency data, including our own results, are evaluated with respect of design characteristics, operating conditions, applied analytes and chemical modifiers/carriers.

AB - A laboratory-made graphite furnace electrothermal vaporizer (GF-ETV) was applied with two alternative versions of the exit part. In one of the versions the vapor streams upward through the transverse hole of the longitudinally heated tube (upward streaming: UPS), while with the other version the vapor streams toward one of the ends of the tube (end-on streaming: ENS). Volatile (Cd, Zn) and medium volatile elements (Cu, Mg, Mn) were applied in multi-element solutions, in the mass range of 4-10 μg for each analyte. Net line intensities were compared for the two versions, and also for applying toluene or carbon tetrachloride vapor in the furnace atmosphere. Using pure argon as the internal furnace gas, the line intensities of the medium volatile elements Cu and Mg were lower for the ENS than for the UPS by approximately 40%. This was in agreement with findings of other authors for similar systems, and was explained by condensation of vapors on cooler parts of the graphite tube, close to the outlet end. On the other hand, the UPS and ENS provided similar line intensities for Cu and Mg when CCl4 vapor (0.5% v/v) was used in the internal furnace gas as a result of the formation of volatile chlorides, which do not condense in the graphite tube. Recently published transport efficiency data, including our own results, are evaluated with respect of design characteristics, operating conditions, applied analytes and chemical modifiers/carriers.

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