Determination of Fluorine Content in Refined Phosphoric Acid Produced by Organic Solvent Extraction
According to the requirements for determining the fluorine content of various acids and esters in the process of refining phosphoric acid by organic solvent extraction,the fluorine content determination method in the industry standard"Wet Purified Phosphoric Acid for Industrial Use"(HG/T 4069-2008)is optimized,the sample sampling amount and the concentration of the prepared fluorine standard solution are adjusted,and experimental verification is carried out.The results show that,while ensuring the accuracy of the measurement results,the optimized method expanded the measurement range of fluorine content,with a relative standard deviation of 1.92%to 2.76%,which can meet the requirements for the determination of fluorine content in the process of organic solvent extraction to produce refined phosphoric acid.
solvent extraction methodwet process phosphoric acidphosphoric acid purificationrefined phosphoric acidfluorine
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