Aljaffry, Alradhiatul Zulaikha Mohd
(2020)
Simultaneous determination of arsenic (Ⅲ) and arsenic (Ⅴ) in polluted Sg. Riu, Perak water samples.
Masters thesis, Universiti Sains Malaysia.
Abstract
Contamination of the environment with arsenic (As) from both natural sources and
anthropogenic activities has occurred in many parts of the world and also has been
recognised as a global problem. Although there is no specific legislation for As species
values but the researchers found that inorganic arsenic compounds are far more toxic and
harmful than the organic ones. As contamination in Sungai Rui, Perak is widespread due
to the mining location near the river. Objective of this research is to determine the
concentration of inorganic As in polluted Sungai Rui, Perak sample. Therefore, anodic
stripping voltammetry (ASV) method is preferred for As analysis mainly owning to its
high selectivity and sensitivity. The highest concentration of As(Ⅴ) was noticeable in
STA 10 (8.420±0.408) μg/L and the lowest was in water sample labelled STA 22
(3.323±0.385) μg/L. Most of the concentration of As(V) detected in between 3-7 μg/L
while for As(Ⅲ) could not be established due to unsuitable condition. Thus, further study
need to be done to achieve suitable method for simultaneous detection of As(Ⅲ) and
As(Ⅴ).
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