Influence of Analyte Volatility and Ashing Temperature on the Absorbance—Atomization Pressure Relationship in Electrothermal Atomic Absorption Spectrometry. The Case of Arsenic. Some Facts and Speculations
作者:
János Fazakas,
PaulGh. Zugrǎvescu,
期刊:
Spectroscopy Letters
(Taylor Available online 1991)
卷期:
Volume 24,
issue 4
页码: 525-538
ISSN:0038-7010
年代: 1991
DOI:10.1080/00387019108018136
出版商: Taylor & Francis Group
关键词: electrothermal atomization;arsenic;volatility;pressure;non-isobarity of the atom reservoir
数据来源: Taylor
摘要:
Various fundamental and applied aspects of pressurized atomization are discussed. The graphite furnaces are shown to be non-isobar in space and time. This is determined by the non-isothermality in space and time. Volatile and non-volatile forms of the same element are shown to be influenced differently by pressure. The ashing temperature used also influences the behaviour of analytes vis à vis atomization pressure. It is suggested that furnace designs that avoid high pressures within the furnace during atomization may lead to an enhancement of sensitivity, at least in the case of volatile elements. The use of matrix modifiers may change the spectral conditions by altering the shape and profile of spectral lines. Our discussion refers only to the case when line sources of radiation are used.
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