Detection method

　　According to the analytical method specified in the inorganic chemical reagent product standard HG/T 3493-2000 [4].

　　Sodium phosphate content (NA3PO4·12H2O) was sampled by dropping the sample on the pH scale to a pH value of 8.8.

　　Determination of degree of clarification: the sample was dissolved in 10ML water and its turbidity should not be greater than the standard glass emulsion and the standard of degree of clarification HG/ t3493-2000.

　　Determination of chloride (cl-meter) : the turbidity of the sample shall not be greater than the standard comparison solution.

　　Determination of phosphate (SO4) : according to GB/T609, the yellow color of the solution should not be deeper than the standard comparison solution.

　　Determination of iron (in terms of Fe) : the sample taken shall be no deeper than the standard solution solution.

　　Ecological data

　　The substance may be hazardous to the environment and water bodies should be given special attention.

　　The storage method

　　Should be stored in a cool, ventilated, dry storeroom, pay attention to moisture and avoid heat.