APPLICATION OF 3 CHROMOGENIC REAGENTS TO THE DETERMINATION OF PALLADIUM USING A LABORATORY-MADE OPTICAL FIBER DETECTOR FOR FLOW-INJECTION ANALYSIS

被引：7

作者：

XU, YJ ^{[1
]}

CHEN, XG ^{[1
]}

LIU, MC ^{[1
]}

HU, Z ^{[1
]}

机构：

[1] LANZHOU UNIV,DEPT CHEM,LANZHOU 730000,PEOPLES R CHINA

来源：

ANALYTICA CHIMICA ACTA | 1992年 / 262卷 / 01期

关键词：

FLOW SYSTEM; SPECTROPHOTOMETRY; FIBEROPTIC SENSOR; ORES; PALLADIUM;

D O I：

10.1016/0003-2670(92)80013-W

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Palladium in ore was determined by a method in which an optical fibre detector is connected to a flow-injection analysis system and using three chromogenic reagents, i.e., 1,8-dihydroxy-2-(4-chloro-2-phosphonophenylazo)-7-(6,8-disulphonaphthylazo)naphthalene (RI), 1,8-dihydroxy-2-(4-chloro-2-phosphonophenylazo)-7-(4-sulphonamidophenylazo)-3,6-disulphonaphthalene (RII) and 1,8-dihydroxY-2-(4-chloro-2-phosphonophenylazo)-7-(p-hippuric acid azo)-3,6-disulphonaphthalene (RIII). The methods are simple, rapid and selective. In the Pd-RI system, the molar absorptivity is 4.3 X 10(4) l mol-1 cm-1 at 650 nm and Beer's law is obeyed in the range 1-3-mu-g Pd ml-1. In the Pd-RII system, the molar absorptivity is 3.0 X 10(4) 1 mol-1 cm-1 at 640 nm and Beer's law is obeyed in the range 1-4-mu-g Pd ml-1. In the Pd-RIII system, the molar absorptivity is 3.4 X 10(4) 1 mol-1 cm-1 at 630 nm and Beer's law is obeyed in the range is 1-5-mu-g Pd ml-1. Coexisting noble metal ions do not interfere. An optical fibre detection cell for flow-injection analysis and an optical fibre-spectrophotometer were designed and constructed in-house.

引用

页码：97 / 102

页数：6