Overview: Presents instructions on how to extract, purify, provide modifications, during the purification protocol process.Provides‘examples of‘δ18OP studies in sediments, soils, fresh water, mineral fertilizer.This open access book distinguished itself from other publications by offering step-by-step instructions on how to extract, purify, provide modifications, and major issues to be encountered during the process. For the δ.18.OP method to progress, further fundamental research as well as field and laboratory studies need to be conducted for a better understanding of P cycling in the enviro
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