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Determination of NiCII) and Co(lI) by FAAS after preconccntration on modified alumina column
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shemirani, Farzaneh Kozani, Rcyhaneh Rahnama Salavati, Masood Niasari, I. Abkcnar, Shiva Dehghan |
| Copyright Year | 2003 |
| Abstract | schiff's base has been developed. Effects of pH, flow rate, volume of sample solution, capacity of sorbent and interference of foreign ions on the recovery of the analytes have heen investigated. Under the optimized conditions (PH = 5; flow rate =15 ml min-I), recovery was greater than 98%. The relati ve standard deviations (10 replicate analyses) at the 50 ng ml- I level are 2.5% for Ni(II) and 3.2% for Co(ll) and the corresponding limits of detection (3s, n =10) are 0.014 ngml- ' for Ni(II) and 0.007 ng mrl for Co(ll). The method has been applied for the determination of Ni(II) and Co(ll) in natural waters and standard materials. Trace metal ions have important roles in our life functioning and their determination is becoming increasingly important due to their presence in environmental samples including water, soil and plant, etc. Flame atomic absorption spectrometry is widely used, for analysis of trace metals because of its low cost; however the method suffers from low sensitivity specially for the low concentrations in environmental samples. Matrix interferences also cause problems in analysis by AAS. To overcome these problems, preconcentration and matrix elimination steps are required. There are several methods reported in literature for preconcentration '. Solid phase extraction is an attractive technique based on use of a sorbent that retains the analytes. The analytes are then eluted from the sorbent using a suitable solvent. In solid phase extraction, activated carhon, C-IS, silica-gel, microcrystalline naphthalene, etc. have been used as sorbent for solid phase extraction. Recently use of sorbent activated by surfactant and a hydrophobic chelating agent has been reported2-7. Oitizon (C6HsNHNHCSN:NC6Hs) immobilized on SOS coated alumina has been used for preconcentration of some metal ions such as copper(l) (ref. 4), and mercury(II) (ref. 7). Preconcentration of trace elements has also been reported by the use of water insoluble chelating agent introduced into the hemimicelles of SOS coated alumina8. In the present work, a rapid, highly sensitive and efficient method for determination of trace nickel(Il) and coba1t(II) by F AAS, using a column packed with alumina modified with SOS and schiff's base for the selective extraction and concentration is reported. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://nopr.niscair.res.in/bitstream/123456789/20646/1/IJCA%2042A(5)%201086-1088.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
