FACTORS IN THE DETERMINATION OF CALCIUM, COPPER, IRON, SODIUM AND PHOSPHORUS IN SOME ECOLOGICAL MATERIALS
FACTORS IN THE DETERMINATION OF CALCIUM, COPPER, IRON, SODIUM AND PHOSPHORUS IN SOME ECOLOGICAL MATERIALS
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Date
1983-03
Authors
ABAYOMI, JOB
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Abstract
The effects of heating temperature, time and
acid-mixture in the determination of calcium, Copper,
Iron, Sodium and phosphorus in some soil and plant
samples by wet-digestion using Atomic absorption
spectrophotometer, flame photometer and UV spectrophotometer
have been studied. The values of Iron and Sodium
obtained tend to increase with increase in temperature,
while calcium and phosphorus show a decrease with
increase in the digestion temperature. The copper values
appear essentially independent of the heating temperature
within the range studied. A comparative analysis by dry
ashing at two temperatures agrees with the above trends.
Perchloric-nitric acid mixture gave the highest
values for calcium and phosporus while the highest values
of sodium were obtained using nitric-sulphuric acid
mixture at the same temperature. The values of copper
and Iron obtained were not significantly affected by
the change in acid mixture. The values of sodium
obtained by Atomic Absorption in the presence of an
ionization buffer were comparable to those obtained by
the flame emission technique.
It is suggested that the use of the same digest
solution to determine several minerals, as is often
done, may lead to errors, and optimum conditions should
be determined for each mineral in accurate analysis.
Description
Thesis submitted in partial fulfilment of the
requirements for the degree of Master of Science.
Department of Chemistry,
Faculty of Science,
Ahmadu Bello University,
Samaru - Zaria,
Nigeria.
Keywords
CALCIUM,, COPPER,, IRON,, SODIUM,, PHOSPHORUS,, ECOLOGICAL MATERIALS,