Method for measuring fluorine content in phosphate ore and phosphate concentrate
A technology of fluorine content and phosphorus concentrate, applied in the field of fluorine content detection, can solve the problems of long time and complicated steps, and achieve the effects of high efficiency, simple method and high accuracy
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[0047] In some embodiments, the preparation method of hydrochloric acid includes the following steps: use a glass measuring cup to measure 500ml of analytically pure hydrochloric acid solution and 500ml of high-purity water, mix them evenly, and place them in a 1000ml narrow-mouth glass bottle.
[0048] Hydrochloric acid is mainly used to dissolve the sample, and the sample is dissolved into the hydrochloric acid solution, which is convenient for testing the fluorine content in the sample. The hydrochloric acid provided by this application is mixed according to the volume ratio of analytically pure hydrochloric acid solution and high-purity water at a ratio of 1:1. Any volume of analytically pure hydrochloric acid solution can be selected. This application does not limit it, as long as the volume ratio of analytically pure hydrochloric acid solution and high-purity water is met. A ratio of 1:1 is fine.
[0049] In some embodiments, the concentration C of the fluorine standard ...
Embodiment 1
[0065] This embodiment is used to illustrate the method for measuring fluorine content in phosphate rock and phosphate concentrate disclosed by the present invention, comprising the following steps:
[0066] 1) Prepare a fluorine standard solution with a concentration of 1mg / mL:
[0067] Accurately weigh 0.221g of standard sodium fluoride with an electronic balance, place it in a beaker, transfer a small amount of high-purity water with a glass rod, stir and dissolve, transfer the solution to a 100mL volumetric flask with a glass rod, dilute to the mark with high-purity water, and shake uniform.
[0068] 2) Prepare (1+1) hydrochloric acid solution (1+1 means the volume ratio is 1:1):
[0069] Use a glass measuring cup to measure 500mL of analytically pure hydrochloric acid and 500mL of high-purity water, mix them evenly, and place them in a 1000ml narrow-mouth glass bottle.
[0070] 3) Prepare a citric acid-sodium citrate buffer solution with a pH of 5.5 to 6.0:
[0071] We...
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