Towards green titration: Downscaling the sequential injection analysis lab-at-valve titration system with the stepwise addition of a titrant

• Main Authors: Pathinan Paengnakorn, Saiphon Chanpaka, Kanchana Watla-Iad, Wasin Wongwilai, Kate Grudpan
• Format: Journal
• Published: 2019
• Subjects: Chemistry
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85061379670&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/63616
• Institution: Chiang Mai University

© The Japan Society for Analytical Chemistry. A downscaling in true titration based on a simple sequential injection analysis-lab-at-valve (SIA-LAV) has been proposed. A titrant solution was stepwise aspirated into a titration LAV chamber and a titration curve was obtained by monitoring the change in the solution color spectroscopically. This fully-automated SIA-LAV system required less volume of the sample/reagents, only a micro-liter scale, compared to the conventional method. The system was investigated with complexometric titration and acid-base titration. Application of the developed technique to some real samples has been demonstrated.