Simultaneous determination of iron and copper by third-derivative solid-phase spectrophotometry
Author | dc.contributor.author | Toral Ponce, María | |
Author | dc.contributor.author | Lara Henríquez, Nelson | es_CL |
Author | dc.contributor.author | Gómez, J. | es_CL |
Author | dc.contributor.author | Richter Duk, Pablo | es_CL |
Admission date | dc.date.accessioned | 2009-08-14T11:28:38Z | |
Available date | dc.date.available | 2009-08-14T11:28:38Z | |
Publication date | dc.date.issued | 2002 | |
Cita de ítem | dc.identifier.citation | ANALYTICAL LETTERS 35(1): 153-166 | en |
Identifier | dc.identifier.issn | 0003-2719 | |
Identifier | dc.identifier.uri | https://repositorio.uchile.cl/handle/2250/120769 | |
Abstract | dc.description.abstract | A simultaneous microdetermination of iron and copper at sub-mug/L level by solid phase derivative spectrophotometry has been developed. The compounds TPTZ (2,4,6-tripyridyl-,3,5-triazine) and Neocuproine (2,9-dimethyl-1,10-phenanthroline hydrochloride), were used as chromogenic reagents to form a blue iron complex and an orange copper complex, respectively (pH = 5.0), which are fixed and concentrated on a cation-exchange resin sephadex sp C-25. The influence of experimental variables on the retention of the complexes on the resin are discussed. The signals in derivative units were measured directly on the solid, packed in a I mm spectrophotometric cell. The characteristic amplitude of the signals at 622.0 and 477.0 nm in third-derivative spectra are useful for quantitative determination of iron (0.195-120 ng mL(-1): RSD=1.8%) and copper (0.451-300 ng mL(-1). RSD 1.3%). The method was applied to the iron and copper determination in different types of water, respectively. | en |
Lenguage | dc.language.iso | en | en |
Publisher | dc.publisher | MARCEL DEKKER INC | en |
Keywords | dc.subject | Simultaneous determination of iron | en |
Título | dc.title | Simultaneous determination of iron and copper by third-derivative solid-phase spectrophotometry | en |
Document type | dc.type | Artículo de revista |
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