Analytical Sciences

Abstract − Analytical Sciences, 26(2), 143 (2010).

Simultaneous Injection-Effective Mixing Analysis of Palladium
Norio TESHIMA,* Daisuke NOGUCHI,* Yasutaka JOICHI,** Narong LENGHOR,** Noriko OHNO,*** Tadao SAKAI,* and Shoji MOTOMIZU**
*Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
**Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Okayama 700-8530, Japan
***Chemistry Laboratory, School of Business Administration, Asahi University, 1851 Hozumi, Mizuho 501-0296, Japan
A novel concept of simultaneous injection-effective mixing analysis (SIEMA) is proposed, and a SIEMA method applied to the spectrophotometric determination of palladium using a water-soluble chromogenic reagent has been demonstrated. The flow configuration of SIEMA is a hybrid format of flow injection analysis (FIA), sequential injection analysis (SIA) and multicommutation in flow-based analysis. Sample and reagent solutions are aspirated into each holding coil through each solenoid valve by a syringe pump, and then the zones are simultaneously dispensed (injected) into a mixing coil by reversed flow toward a detector through a confluence point. This results in effective mixing and rapid detection with low reagent consumption.