Colleen Catherine Williams

4 Questions 2 Answers 0 Followers

Questions related from Colleen Catherine Williams

What percent HCl should an acid bath have in order to clean glassware to remove phosphorus?

There is a USEPA standard on this I believe, but I am having trouble finding it. Our lab washes dishes and we place dried dishes in the HCl acid bath to remove contamination but focus especially...

10 August 2023 2,002 4 View

What conventions are followed for finding particle sizes settled via ultracentrifugation when multiple materials (soil/organic matter) are targeted?

I am using a Beckman ultracentrifuge to settle out colloids (less than 1um in diameter, with filtration occurring beforehand) from soil column leachate and trying to figure out the lower limit of...

13 May 2021 1,235 0 View

How can I take subsamples of water from a larger sample in a way that allows me to measure the iron content of the subsample?

I learned how to take subsamples with a magnetic stir bar, but I noticed iron particles stick to the bar, and I am having trouble finding a standard method to solve that problem. How can I take a...

05 February 2021 4,965 1 View

What are some methods to measure nutrient contents in manure using ICP-OES?

I am planning to analyze manure samples for Total Kjeldahl NItrogen, Total Kjeldahl Phosphorus, and dissolved reactive phosphorus using and AQ2 analyzer. I would like to also look at...

28 August 2020 7,028 4 View