Optical Sensor for the Determination of Lead(II) Based On Immobilization of Dithizone onto Chitosan-Silica Membrane

https://doi.org/10.22146/ijc.23560

Yuspian Nur(1), Eti Rohaeti(2*), Latifah Kosim Darusman(3)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Darmaga Campus, Kimia Building, Tanjung Street, Bogor 16680
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Darmaga Campus, Kimia Building, Tanjung Street, Bogor 16680
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Bogor Agricultural University, Darmaga Campus, Kimia Building, Tanjung Street, Bogor 16680 Biopharmaca Research Center, Institute of Research and Community Empowerment, Bogor Agricultural University, Taman Kencana Campus-Bogor
(*) Corresponding Author

Abstract


Optical sensor based on incorporation of dithizone and chitosan-silica for the determination of lead (II) ion has been conducted. The optical sensor was made by composite of chitosan and silica in the ratio 2:1. Sol gel technique was chosen to make the membrane because it has some advantages such as its low temperature and chemical reactivity. The sensor has a good selectivity at pH 5 with response times at ± 180 s. Linearity responses was obtained with concentration range from 0.2 to 1.1 ppm with r2 = 0.9921. Average of %RSD on precision and accuracy (%PK) test were 1.46 and 100.96%, respectively. Limit of detection (LOD) and limit of quantification (LOQ) were 0.11 ppm and 0.37 ppm, respectively

Keywords


optical sensor; chitosan-silica composite; dithizone; lead(II) metal

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DOI: https://doi.org/10.22146/ijc.23560

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