OR/14/067 Preparation of resins

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Lapworth, D J, Surridge, B, Williams, P J, Heaton, T H E, and Gooddy, D C. 2014. Method for analysing phosphate 18O/16O ratios for waters with high C:P ratios. British Geological Survey Internal Report, OR/14/067.

The conditioning of resins can be time consuming so should be carried out prior to sample collection.

Dowex 1X8–200 anion exchange resin is conditioned with 1 M HCl (Aristar) solution in a large (1000 ml or 2000 ml) conical flask and placed on a shaker for 1 hour at approx. 90 motions per minute, then the 1 M HCl is poured off and the resin slurry rinsed repeatedly with Ultrapure water until a pH of 6 is achieved.

Dax-8 resin is conditioned with analytical grade methanol in a large conical flask on a shaker for 2 hours and then rinsed several at least 5 or 6 times with Ultrapure water to leave a clean resin slurry.