Penentuan Nitrit sebagai Zat Warna 4-(4-Nitrobenzenazo)-1-aminonaftalen dengan Membran Optik Berbasis PVC-DOS
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.
Penulis: Choirul Amri, Dwi
Siswanta, Mudasir
Kode Jurnal: jpkimiadd050049
