Determination of Co(II) in water and soil samples using spectrophotometry coupled with preconcentration on 4-amino methyl pyridine anchored silica gel column

4-amino methyl pyridine anchored silica gel (4-AMPS) was used as a sorbent in a simple sensitive spectrophotometry determination of Co(II) in various samples using piperazine dithiocarbamate as a color developing agent (lambda(max)=390 nm) at pH 5.0+/-0.2. Beer's law was obeyed over the range o...

Full description

Saved in:
Bibliographic Details
Published in:Journal of hazardous materials 2007-07, Vol.146 (1-2), p.137-141
Main Authors: SIVANI, C, RAMAKRISHNA NAIDU, G, NARASIMHULU, J, REKHA, D, DILIP KUMAR, J, CHIRANJEEVI, P
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Carbamates - chemistry
Cobalt - analysis
Cobalt - chemistry
Exact sciences and technology
Hydrogen-Ion Concentration
Piperidines - chemistry
Pollution
Silica Gel
Silicon Dioxide - chemistry
Soil Pollutants - analysis
Soil Pollutants - chemistry
Spectrophotometry
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - chemistry
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:4-amino methyl pyridine anchored silica gel (4-AMPS) was used as a sorbent in a simple sensitive spectrophotometry determination of Co(II) in various samples using piperazine dithiocarbamate as a color developing agent (lambda(max)=390 nm) at pH 5.0+/-0.2. Beer's law was obeyed over the range of 0.1-5.0 microg ml(-1). The molar absorptivity and Sandell's sensitivity were 1.257x10(5) lmol(-1) cm(-1) and 0.006145 microg cm(-2), respectively. Under these conditions, the preconcentration factor obtained was 80, and the detection limit achieved was 5.0 ng ml(-1). The detailed study of various interfering ions made the method more sensitive and selective. The recovery of Co(II) from various samples range from 97.50 to 99.66%. The present method was successfully applied for the determination of Co(II) in various water and soil samples. The proposed method was compared with reported methods in terms of Student's 't'-test and variance ratio 'f'-test which indicates that there is no significant difference between proposed and literature method at 95% confidence level.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2006.11.060