SPECTROPHOTOMETRIC DETERMINATION OF Cu(II), Co(II) AND Ni(II) IONS IN MONO AND MULTI-COMPONENT SYSTEMS
Journal Title: BULETINUL INSTITUTULUI POLITEHNIC DIN IASI, CHIMIE SI INGINERIE CHIMICA - Year 2016, Vol 62, Issue 2
Abstract
The selective determination of Cu(II), Co(II) and Ni(II) ions from aqueous solution was spectrophotmetrically investigated using rubeanic acid as color reagent. The reaction between Cu(II), Co(II) and Ni(II) ions with rubeanic acid occurs rapidly at pH 3.5 in case of Cu(II) ions and at pH 9.0 in case of Co(II) and Ni(II) ions (buffered solutions). The metal complexes have absorption maximums at different wavelength (380 nm for Cu(II), 480 nm for Co(II) and 590 nm for Ni(II), respectively) and this characteristic underlies the possibility of their determination in multi-components systems. This method allows the determination of these metal ions in a relatively wide concentration range, with acceptable detection limits. The interferences caused by each metal ion in the determination of the other were evaluated on the basis of the selectivity coefficients. The validation of Cu(II), Co(II) and Ni(II) determination through this method was done by recovery tests of metal ions in tap water. The obtained results shows that this spectrophotometric method can be successfully used for the analysis of Cu(II), Co(II) and Ni(II) ions in water samples, whether are in mono- or multi-components systems
Authors and Affiliations
VLADISLAV FORNEA, ŞTEFAN TRUPINĂ, ALEXANDRU VASILICĂ IOSUB, LAURA BULGARIU
Keywords
Related Articles
- EP ID EP200403
- DOI -
- Views 97
- Downloads 0
AZO-POLYMERS – PHOTOCROMIC BEHAVIOUR STUDIES
Understanding the response to illumination at molecular level and characteristics of azo-materials features the key to new bio-science applications and not only. Although a number of mechanisms have been proposed, the en...
OPTIMIZATION THE PHYSICAL-CHEMICAL PROCESSES IN THE TREATMENT OF DOMESTIC AND INDUSTRIAL WASTEWATERS
Sometimes the domestic wastewaters and certain types of industrial waters, inadequately treated, as well as runoff water from fertilized agricultural lands reach in the surface waters. These are important sources of nutr...
ANALYTICAL METHODS FOR ANALYZING SOME OILSUSED IN COSMETICS
In this paper three different oils have been analysed: sesame, olive and jasmine. For their analyses standard methods for oils and fats described by American Oil Chemists Society (AOCS, 1993) and pharmacopoeia assays (Br...
BIOSORPTION OF Zn(II) IONS FROM AQUEOUS SOLUTION ONTO MUSTARD WASTE BIOMASS
In this study, the mustard waste biomass, obtained from mustard seeds after oil extraction, was used as biosorbent for removal of Zn(II) ions from aqueous solution. The experiments were performed in batch systems at room...
Effect of Surface Morphology on Cell Growth on Polyester Films Immobilized with Biomolecules
There are many methods to modify the surface properties of the polymer films, such as chemical, mechanical, enzymatic or physical treatments. The polyesters are frequently used to improve the adhesion of the proteins and...