TAILIEUCHUNG - Development and validation of a simple spectrophotometric method for quantification of chloride in polymeric materials

A simple analytical method was developed for determination of chloride content in polymeric materials. The procedure comprises of two steps, the dissolution of the polymer by alkaline fusion followed by indirect spectrophotometric analysis of the chloride based on the absorption at 460 nm of Fe(SCN)2+, a product of the reaction between chloride ion and a mixture of mercury (II) thiocyante and ferric ion. A non-linear calibration curve was constructed from to 20 ppm with R2 = ; the limit of detection and quantitation were of and ppm, respectively. The recovery of the whole procedure was higher than % with a RSD %. The developed procedure was applied to animated poly(divinylbenzene-co-vinyl benzyl chloride) in order to investigate the extent of amination of the base material. | Science & Technology Development, Vol 18, 2015 Development and validation of a simple spectrophotometric method for quantification of chloride in polymeric materials Huynh Minh Chau Nguyen Thao Nguyen Vo Dinh Thien Vu Nguyen Anh Mai University of Science, VNU-HCM (Received on December 12 th 2014, accepted on August 12 th 2015) ABSTRACT A simple analytical method was developed for determination of chloride content in polymeric materials. The procedure comprises of two steps, the dissolution of the polymer by alkaline fusion followed by indirect spectrophotometric analysis of the chloride based on the absorption at 460 nm of Fe(SCN)2+, a product of the reaction between chloride ion and a mixture of mercury (II) thiocyante and ferric ion. A non-linear calibration curve was constructed from to 20 ppm with R2 = ; the limit of detection and quantitation were of and ppm, respectively. The recovery of the whole procedure was higher than % with a RSD %. The developed procedure was applied to animated poly(divinylbenzene-co-vinyl benzyl chloride) in order to investigate the extent of amination of the base material. Key words: Polymer, alkaline fusion, indirect spectrophotometric analysis, chloride ion, mercury (II) thiocyante, ferric ion. INTRODUCTION Many polymeric materials containing active chloride have been used as intermediate products for introducing a number of functional groups for various applications [1, 2]. Therefore, methods have been developed to analyze chloride . XPS [3], combustion and colorimetric method [4]. However, they cannot accurately determine the chloride content in a wide concentration range, especially at low levels of chloride. In this work, the chloride determination method was developed including two steps, (1) the dissolution of the Trang 152 polymer by alkaline fusion and (2) an indirect spectrophotometric analysis of the chloride by measuring absorbance of Fe(SCN)2+ complex, .

• Sinh học
• Development and validation of a simple spectrophotometric method
• A simple spectrophotometric method
• Quantification of chloride in polymeric materials
• The dissolution of the polymer