2013Posted by Ruth Vingerhagen Feb 12, 2016 12:58
The solid samples haven't been neglected either. All the solid samples (river sediments and moraine samples) have been dried. Part of the sample has been used to obtain a clay separate for each sample and the rest of the sample has been gound to a fine powder in preparation for chemical characterisation.
2013Posted by Ruth Vingerhagen Feb 12, 2016 12:57
Today was the turn of the anion concentrations in the water samples to be measured, this was done at the geography department at the University of Durham
. Anions are measured by ion chromatography, the water samples pass through a column and beacuse each ion has a different size and charge the anions move at different speeds and get separated out. For each sample the result is a set of peaks and the concentrations are proportional to the area under each peak. Each sample takes abour half an hour to run but luckily there is an autosampler which takes 100 samples so it is just a case of loading everything up and letting the machine do the rest.
2013Posted by Ruth Vingerhagen Feb 12, 2016 12:56
Today I had a trip to the chemistry department at Edinburgh University
to do the major cation analysis of the water samples. The anylsis was done by ICP-OES (inductively coupled plasma - optical emission spectrometry): each element emits a specific wavelength of light, and the intensity of that light is proportional to its concentration.
2013Posted by Ruth Vingerhagen Feb 12, 2016 12:55
I (and my samples) have moved to the University of St. Andrews
for a two year Marie-Curie postdoctoral fellowship. The project is essentially an extension of the work funded by the Swiss National Science Foundation that I started at NGU in Trondheim. Now I can begin analysing all the water samples!
2013Posted by Ruth Vingerhagen Feb 12, 2016 12:52
The samples are back from Svalbard! There wasn't enough snow earlier in the winter to drive a snowmobile into Fardalen, so the samples had to wait until now to be collected. I was worried about them being in -20 degrees Celcius for a long time since the water samples could have frozen and burst their bottles, but this seems not to have happened. Many thanks to Spitsbergen Travel
for collecting and sending my samples back to Trondheim!