17 January 2008

Residence time of lab samples

Posted by Jessica Ball

Here’s an situation I’ve been dealing with for a while. During the research I did for my undergraduate thesis in the summer of 2006, I collected a number of samples to use for Ar-Ar dating, with the intention that I would actually accompany them to a lab and learn the processes involved in mineral separation, irradiation, analysis, etc. Fast forward to January and February of 2007, where I (after much communicating with the scientist in charge of this particular lab) was finally able to arrange to spend a few weeks working in the lab.

I was lucky enough to live near the lab, although it was several hours’ drive away from my campus. The first week I worked there was during my winter break, which was fine; almost a month off between semesters is enough to make anyone eager to get out of the house. The second week, however, was during classes, and I had to make special arrangements with several professors outside of the geology department to miss classes so I could go home and work at the lab. On completing the mineral separations and having prepared the samples for irradiation, I was assured by the scientist I was working with that I would have data from the samples in time to include it in my senior honors thesis. (This was early February, and my thesis was due late in April.)

Fast forward again to April. After having heard little from the lab (and with my advisor having had as little luck as I did in getting in touch with the person I’d worked with), I finally succeeded in getting through on the phone – and was told that not only had my samples not been run, they had never been sent off for irradiation. There was some explanation about the cost of reactor time and wanting to include as many samples in the shipment as possible, but it wasn’t clear why I had been told that I would have data in time for my thesis when it wasn’t really going to happen. I was very upset, but after a while I calmed down and came to agree with my advisor on the point that it would be one less thing to write up in an already long thesis, not to mention that we were going to write a more comprehensive paper later. (The dating was originally a major part of my thesis proposal, but as I ended up branching out into structural and geochemical aspects later on, it wasn’t totally devestating not to have it.)

And now the current state of affairs: Advisor and I are in the process of writing a paper on multiple volcanic deposits in the area where I did my field work, and are of course eager to include Ar dates in it, seeing as I didn’t get to them in my thesis, and we’re trying to correlate the deposits with other regional volcanics. And what’s the status of our samples?

Still not run (although they have been irradiated). This time the excuse is a somewhat legitimate one (the equipment has been broken and the head of the lab was unaware of it, having been on vacation for a month), but it’s still extremely frustrating – not to mention that I have to wonder why the samples were sitting around all summer and fall of last year. So, I now have irradiated samples but no data, thus stalling another paper. My advisor had also planned on me taking the time to learn how to reduce the data, but it’s going to become more and more difficult to find the time for that, since I’m working full time and will have to start visiting prospective graduate schools soon.

My question for everyone else is, is this a normal thing? I understand that a non-academic lab might not run on the same schedule as an undergraduate trying to write a thesis, but it’s now been almost a year to the day since I started working on those samples, and I find it hard to believe that this kind of turn-around time is acceptable in a research situation. I invested a considerable amount of time and effort into this and even missed classes so I could complete the sample preparations and leave enough time to have them analyzed for my thesis.

I somehow feel I’ve been gypped, but I don’t know what other peoples’ experiences have been with this kind of situation.