So I need a little help confirming something.
[...] key components of urine (urea, creatinine and uric acid) were not diluted in the fluid.
Does it mean that key components of urine was found in the fluid, at concentrated levels, or that the key components was not found in the fluid?
I think that the key components was found, at concentrated levels, but since english is not my first language, and in my language, this could be interpreted in such a way that it sounds like the key components were "watered-down".
Also, I could not find another example of use of the word "diluted" (antonym. "not diluted"), in such a way that it's causing the confusion. I suppose it is a case of bad sentence strucuring (Something I am almost certainly guilty of when writing this question).
So which is it? Were the key components present at higher levels, or at lower levels?