TY  - JOUR
T1  - Rapid Quantitative Determination of Total Inorganic Arsenic
AU - Leong, Jin Hoong AU - Ong, Keat Khim AU - Zin, Wan Yunus Wan Md AU - Anwar, Fitrianto AU - Teoh, Chin Chuang AU - Jamal, Siti Hasnawati AU - Osman, Mohd Junaedy 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 11
SP  - 3522
EP  - 3527
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.3522.3527
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.3522.3527
KW  - Crucial
KW  -colorimetric
KW  -image
KW  -Gutzeit method
KW  -toxic color
KW  -values
AB  - Arsenic contamination in the environment has become the worldwide problem due to its harmful
effect to the environment. The main species of arsenic found in natural waters are arsenic (III) and arsenic (V).
However, arsenic is normally detected as arsenic (III) or arsenic (V), thus, detection of both species in water
samples is crucial. Although, colorimetric method is widely used for detection of arsenic on sites but the
interpretation of the results is operator dependent. Hence, the main objective of this study is to develop a
mathematical model to determine total inorganic arsenic quantitatively where the accuracy and precision of the
colorimetric method is enhanced by image processing technique. The developed mathematical model relates
total inorganic arsenic concentrations with Red, Green and Blue (RGB) color values and it can be expressed as:
total inorganic arsenic = 405-0.133 Red-1.88 Green-0.559 Blue. The adequacy of the model was proved
statistically and it can determine total inorganic arsenic with a linear range of 0-300 μg/L and a detection limit
of 2.08 μg/L was determined which was lower than previous developed visual method. In addition, less toxic
color generating reagent was applied in this study compared to Gutzeit method.
ER  -