On the mechanisms of organic acid modifiers used to eliminate magnesium chloride interferences in graphite furnace atomic absorption spectrometry

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Abstract

Graphite furnace vaporization and inductively coupled plasma excitation, atomic emission spectrometry (GFV-ICP-AES) was applied for monitoring the volatilization of analytes (Cd, Pb, Zn), matrix element (Mg) and the release of carbon containing species. The gas streaming conditions were similar within the horizontal, end-heated graphite tube to that applied conventionally in graphite furance atomic absorption spectrometry (GFAAS). Gas evolution experiments were performed with the use of a quartz furnace, the evolved HCl gas was collected in an absorption vessel for titrimetric determination. The effect of both ascorbic and oxalic acids lies in essence on the promotion of the formation and thermal evolution of hydrochloric acid from the chloride salts at relatively low temperatures. Thus, in the GFAAS analysis, the hydrochloric acid can be evaporated in an extended drying step and/or at the beginning of a properly selected pyrolysis step without loss of analytes. The oxalic acid was found to be more effective than the ascorbic acid in the case of calcium chloride and sodium chloride matrices.

Original languageEnglish
Pages (from-to)1599-1612
Number of pages14
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume50
Issue number13
DOIs
Publication statusPublished - 1995

Fingerprint

magnesium chlorides
Atomic absorption spectrometry
Magnesium Chloride
Graphite
Organic acids
furnaces
Magnesium
Furnaces
graphite
interference
acids
oxalic acid
Oxalic acid
Hydrochloric Acid
ascorbic acid
Gases
Ascorbic acid
hydrochloric acid
Hydrochloric acid
Vaporization

Keywords

  • Chemical modification
  • Graphite furnace electrothermal vaporization
  • Inductively coupled plasma excitation spectrometry
  • Magnesium chloride hydrolysis

ASJC Scopus subject areas

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

Cite this

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title = "On the mechanisms of organic acid modifiers used to eliminate magnesium chloride interferences in graphite furnace atomic absorption spectrometry",
abstract = "Graphite furnace vaporization and inductively coupled plasma excitation, atomic emission spectrometry (GFV-ICP-AES) was applied for monitoring the volatilization of analytes (Cd, Pb, Zn), matrix element (Mg) and the release of carbon containing species. The gas streaming conditions were similar within the horizontal, end-heated graphite tube to that applied conventionally in graphite furance atomic absorption spectrometry (GFAAS). Gas evolution experiments were performed with the use of a quartz furnace, the evolved HCl gas was collected in an absorption vessel for titrimetric determination. The effect of both ascorbic and oxalic acids lies in essence on the promotion of the formation and thermal evolution of hydrochloric acid from the chloride salts at relatively low temperatures. Thus, in the GFAAS analysis, the hydrochloric acid can be evaporated in an extended drying step and/or at the beginning of a properly selected pyrolysis step without loss of analytes. The oxalic acid was found to be more effective than the ascorbic acid in the case of calcium chloride and sodium chloride matrices.",
keywords = "Chemical modification, Graphite furnace electrothermal vaporization, Inductively coupled plasma excitation spectrometry, Magnesium chloride hydrolysis",
author = "T. K{\'a}ntor",
year = "1995",
doi = "10.1016/0584-8547(95)01358-X",
language = "English",
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pages = "1599--1612",
journal = "Spectrochimica Acta, Part B: Atomic Spectroscopy",
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TY - JOUR

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AU - Kántor, T.

PY - 1995

Y1 - 1995

N2 - Graphite furnace vaporization and inductively coupled plasma excitation, atomic emission spectrometry (GFV-ICP-AES) was applied for monitoring the volatilization of analytes (Cd, Pb, Zn), matrix element (Mg) and the release of carbon containing species. The gas streaming conditions were similar within the horizontal, end-heated graphite tube to that applied conventionally in graphite furance atomic absorption spectrometry (GFAAS). Gas evolution experiments were performed with the use of a quartz furnace, the evolved HCl gas was collected in an absorption vessel for titrimetric determination. The effect of both ascorbic and oxalic acids lies in essence on the promotion of the formation and thermal evolution of hydrochloric acid from the chloride salts at relatively low temperatures. Thus, in the GFAAS analysis, the hydrochloric acid can be evaporated in an extended drying step and/or at the beginning of a properly selected pyrolysis step without loss of analytes. The oxalic acid was found to be more effective than the ascorbic acid in the case of calcium chloride and sodium chloride matrices.

AB - Graphite furnace vaporization and inductively coupled plasma excitation, atomic emission spectrometry (GFV-ICP-AES) was applied for monitoring the volatilization of analytes (Cd, Pb, Zn), matrix element (Mg) and the release of carbon containing species. The gas streaming conditions were similar within the horizontal, end-heated graphite tube to that applied conventionally in graphite furance atomic absorption spectrometry (GFAAS). Gas evolution experiments were performed with the use of a quartz furnace, the evolved HCl gas was collected in an absorption vessel for titrimetric determination. The effect of both ascorbic and oxalic acids lies in essence on the promotion of the formation and thermal evolution of hydrochloric acid from the chloride salts at relatively low temperatures. Thus, in the GFAAS analysis, the hydrochloric acid can be evaporated in an extended drying step and/or at the beginning of a properly selected pyrolysis step without loss of analytes. The oxalic acid was found to be more effective than the ascorbic acid in the case of calcium chloride and sodium chloride matrices.

KW - Chemical modification

KW - Graphite furnace electrothermal vaporization

KW - Inductively coupled plasma excitation spectrometry

KW - Magnesium chloride hydrolysis

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