Spectrophotometric method for the determination of chromium (VI) in water samples.
A simple and sensitive spectrophotometric method for the determination of chromium has been developed. The method is based on the diazotization of Dapsone in hydroxylamine hydrochloride medium and coupling with N-(1-Napthyl) Ethylene Diamine Dihydrochloride by electrophilic substitution to produce an intense pink azo-dye, which has absorption maximum at 540 nm. The Beer's law is obeyed from 0.02-1.0 microg mL(-1) and the molar absorptivity is 3.4854 L mol(-1) cm(-1). The Limits of quantification and Limit of detection of the proposed method are 0.0012 microg mL(-1) and 0.0039 microg mL(-1) respectively. The method has been successfully applied for the determination of chromium in water samples and the results were statistically evaluated with that of the reference method.
Department of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore, 570006, Karnataka State, India. nagarajap58@yahoo.co.in
P
P
Nagaraj
N
N
Aradhana
Anantharaman
A
Shivakumar
Ashwinee Kumar
AK
Shrestha
Avinash K
AK
Gowda
D001391:Azo Compounds / Q000032:analysis / Q000737:chemistry; D002857:Chromium / Q000032:analysis*; D003622:Dapsone / Q000032:analysis / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods*; D019811:Hydroxylamine / Q000032:analysis / Q000737:chemistry; D009281:Naphthalenes / Q000032:analysis / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
D001391:Azo Compounds; C510366:N-(1-naphthalene-1-yl)ethane-1,2-diamine dihydrochloride; D009281:Naphthalenes; D014874:Water Pollutants, Chemical; D014867:Water; D002857:Chromium; D019811:Hydroxylamine; D003622:Dapsone