On-lineヨウ化物抽出/原子吸光法およびモリブドヒ酸青吸光光度FIA法による鉄鋼中のヒ素の定量

概要

論文の詳細を見る
An automated on-line solvent extraction system has been developed for the determination of arsenic in steels by electrothermal atomic absorption spectrometry (ET-AAS) or flow injection analysis (FIA) based on the molybdenum blue reaction. It is based on the reaction of As(III) with iodide ion in the concentrated hydrochloric acid medium to produce AsI_3, which is extracted into benzene and back-extracted into water. Because of an easy separation of water phase and benzene phase, a gravitational phase separator column was used in the automated on-line solvent extraction system. It was not utilized a membrane type phase separator so that the proposed automated on-line solvent extraction system was obtained with long-term stability, low solvent consumption and high reproducibility. Using the proposed automated online solvent extraction system, arsenic contained in the acid decomposed steel sample solution was automatically extracted into the benzene phase and it was back-extracted into the water phase. Then, the back-extracted water phase was used for the determination of arsenic by ET-AAS or FIA. When the ET-AAS method used for the determination of arsenic, 800mgdm^<-3> of cobalt solution had to use as the matrix modifier to remove an effect of coexisted substances such as iodide ion. In this method, a determination limit of As is 0.2μg in the 0.1 g of steel sample. When the FIA method used forthe determination of arsenic, a determination limit of As was 1.0μg in the 0.1 g of steel sample.
社団法人日本鉄鋼協会の論文

On-lineヨウ化物抽出/原子吸光法およびモリブドヒ酸青吸光光度FIA法による鉄鋼中のヒ素の定量

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

On-lineヨウ化物抽出/原子吸光法およびモリブドヒ酸青吸光光度FIA法による鉄鋼中 のヒ素の定量

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

On-lineヨウ化物抽出/原子吸光法およびモリブドヒ酸青吸光光度FIA法による鉄鋼中のヒ素の定量