alexa Inorganic and organic phosphate measurements in the nanomolar range.


Journal of Food Processing & Technology

Author(s): Van Veldhoven PP, Mannaerts GP

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Abstract A procedure, based on the complex formation of malachite green with phosphomolybdate under acidic conditions, to measure inorganic orthophosphate in the nanomolar range is described. The addition of polyvinyl alcohol is required to stabilize the dye-phosphomolybdate complex. The advantages of the assay are simplicity, stability of the reagents, and high sensitivity. Due to the high permissible acidity in the assay (0.9 N H2SO4), the method can be adapted easily to measure nanomolar amounts of phosphate, liberated from organic compounds like phosphoproteins and phospholipids after wet digestion.
This article was published in Anal Biochem and referenced in Journal of Food Processing & Technology

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