Open AccessInteractions of Anion-Exchange Resins with Polyacrylates in Atmosphere
Author(s) -
Hiroya Tauchi,
Yasumoto Sakai,
Noriyuki Okawa,
Hanifa Faozia,
Genki Mizuguchi,
Takashi Yasui,
Keisuke Takada,
Akio Yuchi
Publication year - 2016
Publication title -
analytical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 73
eISSN - 1348-2246
pISSN - 0910-6340
DOI - 10.2116/analsci.32.1071
Subject(s) - chemistry , atmosphere (unit) , ion , ion exchange , ion exchange resin , environmental chemistry , organic chemistry , chemical engineering , thermodynamics , physics , engineering
The interactions of polyacrylates (PAs with mean molecular weight of 4.5, 25, and 250 kDa; Na + ,pa - ) with anion exchange resins in the Br - form (AXRs; -R + ,Br - ) were studied under practical conditions by reaction stoichiometry and spectroscopy. The stoichiometric or an excess amount of PA(4.5 kDa) completely replaced Br- in the AXRs of the cross-linking degree of 2 or 8%, respectively, to give (-R + ,pa - ), due to enhancement in selectivity of carboxylate group by multiple interactions. In contrast, PA(250 kDa) exchanged Br - only on the surface of AXRs and did not penetrate into the resins; CO 2 was involved in the system to induce exchange with CO 3 2- . Using the slightly acidic condition caused substantially no exchange by CO 3 2- but induced coextraction of PA with proton as free Hpa. PA(4.5 kDa) once penetrating into the resin phase as (-R + ,pa - ) or free Hpa was reversibly eluted under the appropriate conditions.