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Sobczy, D.P. et al.

Sobczy, van Grondelle, de Jong, de Voigt, van Santen,

Production of chemically pure gaseous [13N]NH3 pulses for PEP studies using a modified DeVarda reduction.

A fast and reproducible production method for pure gaseous [13N]NH3 pulses has been developed. 13N was produced by irradiation of water with 500 nA of 16 MeV protons via the 16O(p,alpha)13N reaction. A mixture of DeVarda's alloy and NaOH was used to convert the produced nitrate/nitrite to ammonia. Pre-treatment of this mixture with water increased the concentrated production of gaseous [13N]NH3. Separation and further purification of ammonia were performed with GC, leading to 5s pulses (1.1 ml STP) with 3.5 +/- 0.5 MBq [13N]NH3 with a high chemical and radiochemical purity suited for positron emission profiling (PEP).[1]

References

Production of chemically pure gaseous [13N]NH3 pulses for PEP studies using a modified DeVarda reduction. Sobczy, D.P., van Grondelle, J., de Jong, A.M., de Voigt, M.J., van Santen, R.A. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. (2002) [Pubmed]

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