3.2.3
Samples of Rainwater
Samples of rainwater from the study site are required to assess the atmospheric
deposition flux of
7
Be during a period, encompassing the sampling campaign (see
Chap.
2
). The protocol for extraction of
7
Be from rainwater is presented in Appendix
2.1
.
7
Be can be pre-concentrated from solution by co-precipitation with MnO
2
following the method detailed by Short et al. (
2007
). The precipitate is recovered on
glass fibre filters which are placed in a Petri dish of suitable diameter and allowed
to dry before counting on an HPGe gamma detector.
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