DETERMINATION OF NITRITE AS 4-(4-NITROBENZENAZO)-1-AMINONAPHTHALENE DYE USING OPTICAL MEMBRANES BASED ON PVC-DOS MATRIX

https://doi.org/10.22146/ijc.21802

Choirul Amri(1*), Dwi Siswanta(2), Mudasir Mudasir(3)

(1) Environmental Health Department, Health Polytechnics, Jl. Tatabumi, Yogyakarta 55293
(2) Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta 55281
(3) Chemistry Department, Faculty of Mathematics and Natural Sciences Gadjah Mada University, Yogyakarta 55281
(*) Corresponding Author

Abstract


A study of a liquid polymeric membrane based on polyvinylchloride-dioctylsebacate (PVC-DOS) as optical membrane for the spectrophotometric and visual determination of nitrite has been done. The method relied on the formation of a purple colored 4-(4-nitrobenzenazo)-1-aminonaftalen dye in the membrane. The result showed that liquid polymeric membrane can be used as an optical membrane for the determination of nitrite. Optimum conditions of method achieved at a wavelength of 525 nm, reaction pH of 1.7-1.8, and respon time of 45 minutes. This method gave linear range of concentration at 0.0-0.17 mg/L NO2--N, detection limit of 0.004 mg/L NO2--N, and sensitivity of 4.981+0.110 absorbance unit per mg/L of NO2--N. The spectrophotometric and visual optical membrane method by is good for the determination of nitrite at the concentration range of 0.01-0.11 mg/L NO2--N and 0.02-0.60 mg/L NO2--N, respectively.

Keywords: Nitrite; 4-(4-Nitrobenzenazo)-1-aminonaphthalene; Optical Membrane.


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DOI: https://doi.org/10.22146/ijc.21802

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Indonesian Journal of Chemisty (ISSN 1411-9420 / 2460-1578) - Chemistry Department, Universitas Gadjah Mada, Indonesia.

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