Synthesis of α-nitroso-β-naphthol modified amberlite XAD-2 resin and its application in on-line solid phase extraction system for cobalt preconcentration

被引:26
作者
Lemos, VA [1 ]
Santos, JS [1 ]
Baliza, PX [1 ]
机构
[1] Univ Estadual Sudoeste Bahia, LQA, BR-45200000 Jequie, BA, Brazil
关键词
preconcentration; functionalization; cobalt; amberlite XAD-2;
D O I
10.1081/SS-200027351
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this work, an on-line system for preconcentration and determination of cobalt at mug l(-1) level is proposed. Amberlite XAD-2 functionalized with alpha-nitroso-beta-naphthol (NN-XAD) packed in a minicolumn was used as sorbent. Cobalt (II) ions were sorbed in the minicolumn, from which it could be eluted by hydrochloric acid solution. This eluate reacted with Nitroso Salt R and the absorbance of the complex was read at 510 nm in a spectrophotometer. Signals were measured as peak height by using instrument software. Achieved sampling rate was 45 samples per hour. Analytical parameters were evaluated and the results demonstrated that cobalt can be determined, with sample pH in the range of 7.0-8.5, preconcentration time of 60 s with a sample flow rate of 5.0 mL min(-1). The detection limit (3 s) was 6.0 mug l(-1) and the precision (assessed as the relative standard deviation) reached values of 6.1 to 1.9% in cobalt solutions of 10 to 300 mug l(-1) concentration, respectively. The proposed procedure was applied in natural waters. Recoveries of spike additions (10, 25, or 50 mug l(-1)) to natural water samples were quantitative (92-106%).
引用
收藏
页码:3317 / 3330
页数:14
相关论文
共 41 条
[1]   Selective separation of vanadium from molybdenum using D2EHPA-immobilized Amberlite XAD-4 resin [J].
Chen, JH ;
Kao, YY ;
Lin, CC .
SEPARATION SCIENCE AND TECHNOLOGY, 2003, 38 (15) :3827-3852
[2]   ONLINE PRECONCENTRATION OF SILVER ON ACTIVATED ALUMINA AND DETERMINATION IN BOREHOLE WATER BY FLOW-INJECTION ATOMIC-ABSORPTION SPECTROPHOTOMETRY [J].
COETZEE, PP ;
TALJAARD, I ;
DEBEER, H .
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 1990, 336 (03) :201-204
[3]   Separation and enrichment of gallium(III) as 4-(2-thiazolylazo) resorcinol (TAR) complex by solid phase extraction on amberlite XAD-4 adsorption resin [J].
Divrikli, U ;
Soylak, M ;
Elci, L .
ANALYTICAL LETTERS, 2003, 36 (04) :839-852
[4]  
Fang Z., 1993, FLOW INJECTION SEPAR
[5]   Copper determination in natural water samples by using FAAS after preconcentration onto amberlite XAD-2 loaded with calmagite [J].
Ferreira, SLC ;
Ferreira, JR ;
Dantas, AF ;
Lemos, VA ;
Araújo, NML ;
Costa, ACS .
TALANTA, 2000, 50 (06) :1253-1259
[6]   On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry [J].
Ferreira, SLC ;
dos Santos, WNL ;
Lemos, VA .
ANALYTICA CHIMICA ACTA, 2001, 445 (02) :145-151
[7]   Nickel determination in saline matrices by ICP-AES after sorption on Amberlite XAD-2 loaded with PAN [J].
Ferreira, SLC ;
de Brito, CF ;
Dantas, AF ;
de Araújo, NML ;
Costa, ACS .
TALANTA, 1999, 48 (05) :1173-1177
[8]   An on-line continuous flow system for copper enrichment and determination by flame atomic absorption spectroscopy [J].
Ferreira, SLC ;
Lemos, VA ;
Moreira, BC ;
Costa, ACS ;
Santelli, RE .
ANALYTICA CHIMICA ACTA, 2000, 403 (1-2) :259-264
[9]   Metal ion preconcentration with amberlite XAD-2 functionalized with 5-palmitoyl-8-hydroxyquinoline and its analytical applications [J].
Filik, H .
ANALYTICAL LETTERS, 2002, 35 (05) :881-894
[10]   Amberlite XAD-2 functionalized with o-aminophenol:: synthesis and applications as extractant for copper(II), cobalt(II), cadmium(II), nickel(lI), zinc(II) and lead(II) [J].
Kumar, M ;
Rathore, DPS ;
Singh, AK .
TALANTA, 2000, 51 (06) :1187-1196