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Questions related from Kevin Olsen
I am doing lesson plans and am looking for examples of environmental claims that do not stand up to close scrutiny. There are more than enough examples of this related to climate change...so no...
19 January 2021 4,983 7 View
We use the tried and true ammonium molybdate / potassium antimonyl tartrate react in acid medium with reduction to an intensely colored molybdenum blue by ascorbic acid. The resulting solution...
05 November 2020 5,488 10 View
We have a regulatory obligation to have quarterly calibrations on all of our adjustable volume pipettes. The pipette must perform as well as Class "A" volumetric glassware. A 10 ml pipette must...
16 June 2020 8,308 2 View
The variable volume pipettes in my lab are driving me nuts! We have a regulatory obligation to calibrate them quarterly and the cost is getting excessive. So, I am shopping for a 10 ml FIXED...
16 April 2020 7,727 2 View
I am working on my spring semester lesson plans for classes on Environmental Law and Policy. I am looking for a good example of a concept that will be presented. One of the objections that...
27 November 2019 9,511 5 View
We have the following Beckman system: Beckman Coulter PF2D ProteomeLab Protein Fractionation system Pf 2D – 116, pump Pf 2D – organizer Pf 2D – 116, detector These were donated to our university...
06 February 2019 757 1 View
A few days ago I asked a question about persulfate contamination and how it might interfere with a total nitrogen determination. We are doing a persulfate digestion of river water samples and...
03 October 2018 5,173 2 View
I have a dried sewage sample that was mixed with distilled water. After shaking for 24 hours, the solids were filtered out and the liquid retained. I tested the liquid for ortho-phosphates. But...
07 July 2016 6,277 1 View
