Determination of Antimony Compounds With Aas and Hg-Qfaas Technique For Environment Analysis

The determination of antimonite (Sb(lll)) and antimonate (Sb(V)) compounds using
AJlS and HG - QFAPS have been done. The advantage of this HG-QFAPS detection
technique is that it can increase the detection limit and measurement sensit ivity when
compared to measurement with AJlS directly.To increase the sensitivity of the measurements,
a gas-liquid reactor- separator integrated into the HG-QFAPS system has been successfully
prepared. In fact, this gas-liquid reactor-separator is able to increase the sensitivity of
determination of Sb ions in solution. The optimum conditions of parameters measurement
in the determination of Sb ion species with HG method are influenced by the type of
acids, the acid concentrations, and the reductant concentrations have been determined,
and can increase the measurement of analytical performance simultaneously.The result
obtained showed that the antimony compounds provide a good measurement signal.The
developed HG-QFAPS method can increase the detection limit and sensitivity of the
measurement compared to the direct measurement with AJlS which has been proven
from the Sb (Ill) and Sb (V) calibration curves obtained and has also been proven by t test.
The analytical performance obtained is quite good, indicated by the detection limit (LOD),
sensitivity (5), reproducibility as indicated by9la 0/ (Coefficient of Variance), and linearity
(concentration range) measurements. Based on the analytical performance obtained
shows that the developed HG-QFAPS method is very well used for the analysis of Sb ions
in microscopic concentrations.The Sb concentration in environmental samples (volcanic
ash) was determined by measuring directly with HG-QFAPS. The highest Sb concent ration
found in the A volcanic ash sample of 0.65 IJS I kg, volcanic ash taken directly on the edge
of the Sibc(angit volcano in North Sumatra Indonesia compared with B volca~c ash of 0.24
IJS I kg taken at the periphery road a little far from the locat ion of Mount Sibolangit.