Comparison of cation-exchange and chelating cation-exchange resins for the concentration of saxitoxin

✍ Scribed by R. Guevremont; V. Pathak; M.N. Quigley; J.L.C. Wright

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 489 KB
• Volume: 255
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(91)85102-x

✦ Synopsis

Current methods for the concentration of paralytic shellfish poisons mvolve passage of an extract solution through a column of catlon-exchange resm, followed by elutlon and subsequent passage through a column of size-exclusion medmm Although effectwe, such procedures are tedious and time consummg The results of a study comparmg the charactensttcs of a catton-exchange resm wrath a chelating cation-exchange resin mdlcate that the latter 1s selective towards sruutoxm (the most important and most studled of the toxms) In addition, the chelatmg catlon-exchange resin has faster kmetics for abstraction of s;untoxm from solution than does the catton-exchange resm These features recommend chelatmg cation exchange for the mltlal separation of saxltoxm followed by concentration and separation of additional toxms by the normal procedure