Application of three chromogenic reagents to the determination of palladium using a laboratory-made optical fibre detector for flow-injection analysis
✍ Scribed by Yanjun Xu; Xingguo Chen; Mancang Liu; Zhide Hu
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 394 KB
- Volume
- 262
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
Palladium m ore was determmed by a method m which an optical fibre detector 1s connected to a flow-uqectlon anal~ls system and usmg three chromogemc reagents, 1 e , 1,8-dihydroxy-2_(4-chlorcF2-phosphonophenyl~o~7-(6,8dlsulphonaphthylazo)naphthalene (RI), 1,8-d~hydroxy-2-(4-chloro-2-phosphonophenylazo)-7-(4-sulphon~~dopheny~-azo&3,6-dlsulpbonaphthalene (RII) and 1,8-dlhydro~-2-(4-chloro-2-phosphonophenylazo)-7-(p-hlppunc acid azo)_ 3,Grllsulphonaphtalene (RIII) The methods are sunple, rapid and sektlve In the Pd-RI system, the molar absorptmty u 4 3 X lo4 I mol-' cm-' at 650 nm and Beer's law is obeyed m the range l-3 pg Pd ml-' In the Pd-RI1 system, the molar absorptnnty IS 3 0 X lo4 I mol-' cm-' at 640 nm and Beer's law LS obeyed m the range l-4 cg Pd ml-' In the Pd-RI11 system, the molar absorptlvlty IS 3 4 X lo4 1 mol-' cn-' at 630 nm and Beer's law IS obeyed m the range IS l-5 pg Pd ml-' Coexlstmg noble metal ions do not interfere An opttcal fibre detection cell for flowqection analysis and an optlcal fibre-spectrophotometer were deslgned and constructed m-house