Boron specific ion-exchange resin

The effect of additives. Here the aim was to attempt to trap out any reactive boron species that may have been causing the product instability. The addition of various aldehydes, or dienes, boron specific ion exchange resins or other boron trapping agents just before work-up had no effect on the product stability. 

Recent laboratory studies and field operations have demonstrated the excellent performance of a macroreticular boron-specific ion-exchange resin, Amberlite XE-243, for deborat-ing several process streams, sea water, and irrigation water. One large plant is now operating successfully on sea water. Further studies on this product are currently in progress in several areas throughout the world. 

The Amberlite IRA-743 ion-exchange resin which exhibits specificity for boron was used by Sekerka and Lechner [63] for on-line preconcentration of boron with spectropho-tometric detection by the azomethine-H method. 

Figure 6. Schematic of the ion-exchange apparatus for isolating boron from geologic samples. A peristaltic pump draws the dissolved sample and reagents through an ion exchange column fabricatedfrom a I mL polypropylene pipette tip packed with boron specific resin (IRA-743). The photograph of the actual beads is from the manufacturers technical report (Rohm and Haas). The mechanism of exchange of borate on the tertiary amine groups on the resin surface is also shown (46).

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