Spectrophotometric Determination of Thiosulfate in Desulfurization Solutions by Decoloration of Methylene Blue

Spectrophotometric Determination of Thiosulfate in Desulfurization Solutions by Decoloration Methylene Blue Published on: May 1, 2023 Xiuxiu Zhao, Ming Xu, Chunying Ma, Yingying Xianji Ma Spectroscopy, 2023, Volume 38, Issue 5 Pages: 19–22,34 This article proposes a method for the determination thiosulfate decoloring spectrophotometry with methylene blue as an oxidant. has redox properties. Its oxidized form is blue, and its reduced colorless. medium-strength reducing agent. In acidic medium, two can undergo reactions to reduce cause solution exhibit fading reaction within certain range, degree proportional amount added. measures change absorbance (AU) at fixed wavelength 664 nm, ΔAU linear relationship content thiosulfate. The range 0–0.3 mmol/L. From this curve, desulfurization be accurately measured. not interfered other secondary salts during process, high sensitivity. color observed naked eye judge whether there solution. simple perform improved