i am using the Acetone method which is based upon the selective precipitation of gypsum of Acetone, i am wondering whether acetone didn't precipate other salt?
Here you can find a list of methods and the descriptions http://www.fao.org/docrep/t0323e/t0323e07.htm
and one more useful method
There is no standard method, so it depends on your soil and the elementary analyses of for instance the calcite and whether this calcite is active or passive. as well as you could modulate any method according your point of view.
You can read the paper: "Methodologies for the analysis and characterization of gypsum in soils: A review". Jaume Porta. Geoderma 87 1998. 31–46.
You can find there almost all the methods to do so. With pros and cons.
I hope it helps.
You can read the paper: "Refinement of the Differential Water Loss Method for Gypsum Determination in Soils". Artieda et al. Soil Sci. Soc. Am. J. 70:1932–1935 (2006).
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