Analytical Sciences

Abstract − Analytical Sciences, 36(3), 379 (2020).

Development of an Optode Detector for Determination of Anionic Surfactants by Flow Injection Analysis
Ryota SATO, Ryo YAMADA, and Takashi MASADOME
Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, Toyosu, Koto, Tokyo 135-8548, Japan
A flow-injection analysis (FIA) method for assaying an anionic surfactant (AS) using AS optode detector was demonstrated. The optode membrane consists of 2-nitrophenyl octyl ether as a plasticizer, lactone form rhodamine B (L-RB) and poly(vinyl chloride). The linear response concentration range of the AS optode to AS was 20 – 100 μmol dm−3 in the FIA system. The sampling rate for an AS ion (40 μmol dm−3 sodium dodecylbenzenesulfonate) in the proposed FIA system was ca. 5 samples h−1. The AS level in commercially available laundry detergents by the proposed FIA system was determined.