Pre-concentration of rare earths using silica gel loaded with 1-(2-pyridylazo)-2-naphthol (PAN) and determination by energy dispersive X-ray fluorescence

被引：39

作者：

Cornejo-Ponce, L ^{[1
]}

Peralta-Zamora, P ^{[1
]}

Bueno, MIMS ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Quim, BR-13083970 Campinas, SP, Brazil

来源：

TALANTA | 1998年 / 46卷 / 06期

基金：

巴西圣保罗研究基金会;

关键词：

pre-concentration; rare earths; X-ray fluorescence;

D O I：

10.1016/S0039-9140(98)00002-2

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The determination of a single rare earth element in a mixture with other species of this family is a very challenging problem in analytical chemistry due to the close similarity of their chemical properties. In this work, a liquid-solid extraction procedure for praseodymium, neodymium, samarium and yttrium mixtures and subsequent determination by energy dispersive X-ray fluorescence spectrometry is described. The pre-concentration procedure, which involves the use of silica modified with 1-(2-pyridyrazo)-2-naphthol, permits complete recovery of the ran earths and significant sensitivity enhancement in comparison with direct determination in the aqueous phase. Determinations in quaternary mixtures show typical precisions and accuracies of 3% and 5%, respectively. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：1371 / 1378

页数：8

共 25 条

[1]

BARBIERI XZL, 1982, AN 6 S AN ACIESP, V1, P110

[2] DETERMINATION OF TRACES OF RARE-EARTH ELEMENTS IN GEOLOGICAL SAMPLES [J].

BAUERWOLF, E ;

WEGSCHEIDER, W ;

POSCH, S ;

KNAPP, G ;

KOLMER, H ;

PANHOLZER, F .

TALANTA, 1993, 40 (01) :9-15

[3]

BHAGAVATHY V, 1989, ANAL LETT, V22, P197

[4] ENERGY DISPERSIVE-X-RAY FLUORESCENCE (EDXRF) DETERMINATION OF LANTHANIDES AFTER PRECONCENTRATION ON 1-(2-PYRIDYLAZO)-2-NAPHTHOL MODIFIED NAPHTHALENE [J].

BHAGAVATHY, V ;

REDDY, MLP ;

RAO, TP ;

DAMODARAN, AD .

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-ARTICLES, 1991, 149 (01) :35-40

[5] SPECTROPHOTOMETRIC DETERMINATION OF EUROPIUM IN LANTHANIDE AND OTHER MIXTURES BY USE OF METHYLENE-BLUE [J].

BHATTACHARYA, S ;

LYLE, SJ ;

MAGHZIAN, R .

TALANTA, 1980, 27 (01) :59-60

[6]

DASILVA AP, 1964, ANAL CHEM, V36, P532

[7]

FACCHIN I, UNPUB XRAY SPECTROM

[8]

FASSEL VA, 1962, SPECTROCHIM ACTA, V18, P1127, DOI 10.1016/0371-1951(62)80144-1

[9] 1-(2-PYRIDYLAZO)-2-NAPHTHOL (PAN) AS EXTRACTANT IN SOLID LIQUID EXTRACTION OF SOME TRIVALENT RARE-EARTH ELEMENTS [J].

GAO, JZ ;

HU, GL ;

KANG, JW ;

BAI, GB .

TALANTA, 1993, 40 (02) :195-200

[10] On-line-sorption preconcentration and inductively coupled plasma atomic emission spectrometry determination of rare earth elements [J].

Grebneva, ON ;

Kuzmin, NM ;

Tsysin, GI ;

Zolotov, YA .

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, 1996, 51 (11) :1417-1423

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