I recently came across a paper with a methodology description i cant seem to get the grasp of.
I need to make a particular solution for Fe extraction. The protocol's description is from this paper.
Take a 100 μL aliquot of X (a soil sample previously mixed with 0.5M HCl) and mix it with 2 mL of a solution of 0.25M hydroxylamine hydrochloride in 0.25M HCl and incubate at 60 °C.
What I don't understand is how to make the solution when the volume of the two compounds is not specified? Does it imply that the 2mL of solution is made up of equal parts (1mL) of 0.25M hydroxylamine HCl and 0.25M HCl? Any help is highly appreciated. Thanks a lot in advance!