MICELLAR-ENHANCED HIGHLY SENSITIVE REACTION OF RARE-EARTHS WITH XYLENOL ORANGE AND SURFACTANTS - STUDY OF REACTION CONDITIONS AND OPTIMIZATION OF SPECTROPHOTOMETRIC METHOD

被引：67

作者：

HRDLICKA, A ^{[1
]}

HAVEL, J ^{[1
]}

MORENO, C ^{[1
]}

VALIENTE, M ^{[1
]}

机构：

[1] UNIV AUTONOMA BARCELONA,E-08193 BARCELONA,SPAIN

来源：

ANALYTICAL SCIENCES | 1991年 / 7卷 / 06期

关键词：

SPECTROPHOTOMETRY; RARE EARTH ELEMENTS; XYLENOL ORANGE SURFACTANT; REACTION CONDITION;

D O I：

10.2116/analsci.7.925

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Reaction conditions in rare earths(RE)-Xylenol Orange(XO)-cationic surfactant ternary system were studied in detail. Conditional molar absorptivities up to 150000 mmol-1 cm2 were reached. Highly sensitive spectrophotometric method for 15 RE elements (REE) was evaluated under optimal conditions of 0.06 mmol dm-3 XO, 0.6 mmol dm-3 cetylpyridinium bromide, and 0.01 mol dm-3 acetate buffer of pH 4.50. Calibration plots measured at 600, 610, and 620 nm were linear up to 5.5-mu-mol dm-3 REE. The best detection limits of 0.04 - 0.20-mu-mol dm-3 REE were reached at 610 nm. In comparison with the previous results, the sensitivity of determination was increased and the range of knowledge of the mentioned ternary system was extended.

引用

页码：925 / 929

页数：5

共 9 条

[1]

BELOUSOVA VV, 1978, ZAVODSK LAB, V44, P390

[2] DETERMINATION OF THE SUM OF RARE-EARTH ELEMENTS BY FLOW-INJECTION ANALYSIS WITH ARSENAZO-III, 4-(2-PYRIDYLAZO)RESORCINOL, CHROME AZUROL-S AND 5-BROMO-2-(2-PYRIDYLAZO)-5-DIETHYLAMINOPHENOL SPECTROPHOTOMETRIC REAGENTS [J].