Determination of Arsenic in Steel by Metal Furnace-AAS and Flow Injection Analysis Based on Method with On-line Iodide Trace Extraction System

Determination of Arsenic or Tin in Steels by the Automated Extraction System with a Recycled Solvent and an Improved Gravity Phase Separation Column

“…From the results of our previous paper, 50,51) this solution influenced the phase separation of sample solution and organic phase as well as the recovery of arsenic in the manual procedures. However, it did not influence the phase separation and recovery of arsenic in the automated on-line solvent extraction system.…”

“…Iodide As in the previous paper, 50,51) potassium iodide was used for the formation of AsI 3 or SnI 4 . The absolute amounts of potassium iodide influenced the recovery of arsenic and tin.…”

“…Based on a previous paper, 50,51) arsenic and tin in the sample solution were separated by the automated solvent extraction system shown in Fig. 1.…”

“…Flameless Atomic Absorption Spectrophotometry According to some papers, [50][51][52][53] suitable matrix modifier was used in the atomization conditions shown in Tables 1 and 2. For the determination of arsenic, 10 mm 3 of 800 mg dm Ϫ3 of cobalt solution was first injected into the furnace and then the heating program was temperately suspended and 25 mm 3 of sample solution was injected into the furnace.…”

“…Because of this, we could not use the membrane type phase separator, but the gravity type phase separator was suitable for the development of an automated solvent extraction system. Recently, we developed an automated on-line solvent extraction system 50,51) based on the JIS G1225 method. Therefore we attempted to make an automated separation system for the determination of arsenic or tin in steel samples by electrothermal atomic absorption spectrophotometry.…”