Analiza comparativă a concentraţiilor ionilor metalici în condiţiile utilizării de aparatură de laborator diferită [The comparison between the concentrations of metallic ions obtained in the same laboratory using different apparatus]
In the framework of ICP Forests, within the period 1997-1999, the concentrations of Na and Mg in precipitation samples collected in open field and under the wood canopy were determined in the laboratory of ICAS Campulung by atomic absorption spectrophotometry, using a spectrophotometer produce...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
”Ștefan cel Mare” University of Suceava, Faculty of Forestry and “Marin Drăcea” National Research-Development Institute in Forestry - Station Câmpulung Moldovenesc
2004-07-01
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| Series: | Bucovina Forestieră |
| Subjects: | |
| Online Access: | http://www.bucovina-forestiera.ro/arhiva/2004/12(1-2)/analiza-comparativa-a-concentratiilor-ionilor-metalici-in-conditiile-utilizarii-de-aparatura-de-laborator-diferita.pdf |
| Summary: | In the framework of ICP Forests, within the
period 1997-1999, the concentrations of Na and
Mg in precipitation samples collected in open field
and under the wood canopy were determined in the
laboratory of ICAS Campulung by atomic absorption
spectrophotometry, using a spectrophotometer
produced in Romania in 1980. The concentrations
of Ca and K for the same period and samples were
determined by flame ionization, using an apparatus
produced in Est Germany in 1970.
Beginning with 2000 untill 2004, the concentrations
of the four metallic ions were determined
only by atomic absorbtion spectophotometry,
using a spectrophotometer produced in USA in
1975 and donate to the laboratory of ICAS
Campulung by INRA Nancy.
In order to provide the comparability of the
results obtained in time, the detection limits
obtained were compared and 38 samples were
analysed in parallel with the specific apparatus
used within the two periods of mesurements. The
detection limit was the same for Mg, but much
lower for Na (twice), K (tree times) and Ca (ten
times) with the apparatus used in 2000-2004 than
that used in 1997-1999.
The lowest deviations were obtain for Mg (< ∓
20%) and Na ((< ∓ 30), because for these ions was
used the same method (atomic absorption spectrophotometry),
but different apparatus. For K and
Ca were used different methods (flame ionization
and respectively, atomic absorption spectrophotometry)
and apparatus, so the deviations were
higher ( up to ∓ 100 and respectively up to ∓ 40%). |
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| ISSN: | 1582-0769 1582-3725 |