Hi everyone,
I am looking for suggestions to store biological samples in the field for endocrinology analyses, where I will not have electricity. One of the options we are evaluating is a solar freezer, which would be very useful also to cool down ice packs, that will be used together with a cooler box to transport samples from the field to where the camp is. On the other side, I am struggling to find a unit that can guarantee -20C and that looks resistant enough to humidity and heat (the campsite is in Kenya and there is always the possibility of some water too as the tents sometimes leak in case of heavy rain). The other option I am evaluating is liquid nitrogen. With liquid nitrogen tanks (ie 30 L), how many fecal samples (20 grams in cryovials) will I be able to store for about 2-3 weeks (after which the samples will be transferred to a major lab)? Is there any way to have a sort of ice packs to be cooled in the liquid nitrogen tank, to be used with the cooler box to transport the samples from the field to the camp?
Thank you for your help!