caa a22 4500 378878352 CHVBK 20180305123425.0 cr unu---uuuuu 161128e20031201xx s 000 0 eng 10.1524/ract.91.12.737.23424 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.12.737.23424 Quinoline-8-ol modified cellulose as solid phase extractant (SPE) for preconcentrative separation and determination of thorium(IV) [Elektronische Daten] [P. Metilda, J. Mary Gladis, T. Prasada Rao] Cellulose has been functionalized by coupling with 5-chloro-quinoline-8-ol in the presence of alkali. The resulting polymer material has been characterized by IR spectra and has been used for preconcentrating thorium prior to its determination by spectrophotometry. The optimum pH value for quantitative extraction is 5.0-7.0 and can be eluted with 5cm3 of 1mol dm-3 of HCl. The retention capacity of the quinoline-8-ol modified cellulose is 20.0mg g-1. The effect of various cations, anions and neutral electrolytes on the preconcentration of thorium in conjunction with the determination procedure has been studied and we have found that none of interferents including uranium (up to 10 fold amounts) interfere. The enrichment factor for preconcentration of thorium was found to be 200. Ten replicate determinations of 10μg of thorium (IV) present in 1dm3 of sample gave a mean absorbance of 0.084 with a relative standard deviation 1.52. The detection limit (corresponding to three times the standard deviation of the blank) was found to be 2μg dm-3. The thorium content of mixed rare earth chloride solution obtained from Indian Rare Earths Limited (IRE), India was estimated by using quinoline-8-ol immobilized cellulose for preconcentration and subsequent determination by spectrophotometry. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Metilda P. aut Gladis J. Mary aut Prasada Rao T. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/12/2003(2003-12-01), 737-742 0033-8230 91:12/2003<737 2003 91 ract https://doi.org/10.1524/ract.91.12.737.23424 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.12.737.23424 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Metilda P. aut NATIONALLICENCE 700 1- Gladis J. Mary aut NATIONALLICENCE 700 1- Prasada Rao T. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/12/2003(2003-12-01), 737-742 0033-8230 91:12/2003<737 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter