I have been working on rain samples the last 8 or 10 years
we design some rain samplers, and we use to seal
Nujol oil, this is inert. I am sending you some
references about this.
- Isotope studies of precipitation and groundwater in the Sierra de Las
Cruces, México. Cortés, A. and Farvolden, R.N. Journal of Hydrology, 107,
- Studies of Isotopic Hydrology of The Basin of Mexico and Vicinity;
Annotated Bibliography and Interpretation. Cortés, Alejandra, Durazo, Jaime
and Farvolden, Robert N. Journal of Hydrology 198 (1997) 346-376.
Instituto de Geofisica, UNAM
Circuito Exterior, CU
04510 Mexico, D.F.