| 摘要 |
PROBLEM TO BE SOLVED: To provide a quantitative method for a lipid-soluble phosphorus compound that is used to evaluate a fine amount of a lipid-soluble phosphorus compound included in a metal salt. ! SOLUTION: A quantitative method for a lipid-soluble phosphorus compound includes: an aqueous solution forming process of dissolving a metal salt including a lipid-soluble phosphorus compound in water; an adjusting process of adjusting the hydrogen ion concentration exponent pH of the aqueous solution to 1.0 or lower by adding acid to the obtained aqueous solution; an extracting process of adding an organic solvent to the aqueous solution to which the acid is added to extract the lipid-soluble phosphorous compound with the organic solvent; a separation and recovery process of recovering the organic solvent phase-separated from the aqueous solution; and a measurement process of determining the quantity of the lipid-soluble phosphorous compound by measuring the recovered organic solvent by a Fourier transform n |
