Abstract：
:Two spectrophotometric methods have been developed for the determination of nitrite using dapsone (DAP) with alpha-naphthol and 4-amino-5-hydroxynapthalene-2,7-disulphonic acid monosodium salt (AHNDMS) as chromogenic reagents with maximum absorbance wavelength at 540 and 520 nm respectively. For the method that utilizes dapsone with alpha-naphthol (DAP-alpha-naphthol), the beer's law range is obeyed between 0.05-0.8 microg ml(-1) with molar absorptivity of 5.749 x 104 l mol(-1) cm(-1). The second method that uses dapsone with AHNDMS (DAP-AHNDMS), the beer's law is valid over the range 0.2-1.4 mug ml(-1) and molar absorptivity 2.44 x 104 l mol(-1) cm(-1). The common interfering ions in the analytical procedures have been studied. This proposed methods are reliable, reproducible and have been successfully applied to determine nitrite in various water sources of environmental interest.
journal_name
Environ Monit Assessjournal_title
Environmental monitoring and assessmentauthors
Nagaraj P,Prakash JS,Shivakumar A,Shrestha AKdoi
10.1007/s10661-007-0115-3subject
Has Abstractpub_date
2008-12-01 00:00:00pages
235-41issue
1-3eissn
0167-6369issn
1573-2959journal_volume
147pub_type
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