2. ENVIRONMENTAL ChEMISTRy & TEChNOLOGy 2.1. Lectures

Chem. Listy, 102, s265–s1311 (2008) Environmental Chemistry & Technology
enrichment of As, Sb, Se and Te which enables the final use
of ICP-AES.
Volumes of up to 1,000 ml have no effect on the retention
efficiency on Separon SGX C18, C8 and SGX RPS.
The sorption is however quantitative from 500 ml only on
SGX nH 2 , SGX Cn and SGX Phenyl. The weakening of the
retention forces of ionic associate or complexes on the surface
of sorbent may supports the subsequent washing out of
the element species from the column.
A p p l i c a t i o n f o r W a t e r S a m p l e s o n
S e p a r o n S G X C 1 8
Standards of folowing elements were spiked to equilibrated
drinking, mineral and river water samples containing
no detectable amounts of these elements. The Separon SGX
C18 was previously conditioned by 10 ml of distilled water
and 10 ml of 5 × 10 –3 mol dm –3 Septonex ® . The sorption was
provided from 250 ml of sample solutions in the presence of
1.68 × 10 –4 mol dm –3 PAR. Conclusions
Table I
The recovery (%) of arsenic and antimony in water samples a
Spikes
[mg dm
c b
element Arsenic Antimony
–3 ] [mg dm –3 ]
Mineral water
0.25 0.01 58.30 ± 2.44 98.74 ± 2.70
0.50 0.02 60.02 ± 2.60 101.3 ± 3.40
1.00 0.04 60.23 ± 3.36
River water
99.54 ± 2.87
0.25 0.01 59.71 ± 3.14 100.9 ± 2.39
0.50 0.02 60.90 ± 2.69 97.26 ± 3.53
1.00 0.04 62.34 ± 2.43 100.9 ± 3.09
aThe analysis was carried out in triplicate and evaluated
according Dean and Dixon6 bConcentration in 250 ml of water sample
s498
Table II
The recovery (%) of selenium and tellurium in water samples
a
Spikes c element b
Selenium Tellurium
[mg dm –3 ] [mg dm –3 ]
Mineral water
0.25 0.01 100.5 ± 2.57 100.5 ± 3.06
0.50 0.02 98.60 ± 3.00 99.50 ± 3.07
1.00 0.04 99.23 ± 2.66 99.78 ± 2.33
River water
0.25 0.01 99.78 ± 2.71 100.8 ± 2.35
0.50 0.02 98.90 ± 2.80 99.64 ± 2.47
1.00 0.04 101.7 ± 2.11 100.2 ± 1.73
a The analysis was carried out in triplicate and evaluated according
Dean and Dixon 6
b Concentration in 250 ml of water sample
The separation and preconcentration of arsenic,
antimony, selenium and tellurium in the presence of
1.68 × 10 –4 mol dm –3 4-(2-Pyridylazo) resorcinol after previous
conditioning with 5 × 10 –3 mol dm –3 Septonex ® was
described in this paper. This procedure was successfully used
for determination of these elements by ICP-AES in real water
samples.
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