Pretreatment method for detecting boron impurities of titanium dioxide
A technology for titanium dioxide and boron impurities, which is applied in the field of pretreatment for detection of boron impurities in titanium dioxide, can solve the problems of serious matrix effect, affecting the detection accuracy and detection limit of boron impurities, and contamination of the sampling system of the instrument, so as to improve the detection accuracy Degree, avoid pollution, reduce the effect of matrix effect
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Embodiment 1
[0023] A pretreatment method step for detecting boron impurities in titanium dioxide:
[0024] (1) Sampling: Weigh 0.5g sample of titanium dioxide into a PTFE beaker.
[0025] (2) Sample digestion: Add 2.0ml of nitric acid with a mass fraction of 70% and 1.0ml of hydrofluoric acid with a mass fraction of 49% into the beaker to completely digest the sample.
[0026] (3) Propylene glycol complexed boron: add 5.0ml of water to the digestion solution to dilute, measure 2.0ml of propylene glycol into the beaker, ultrasonically oscillate for 3 minutes and then let stand for 5 minutes.
[0027] (4) Transfer and liquid separation: Pour the solution in the beaker into the PP separating funnel, wash the beaker, and put the washing liquid into the PP separating funnel.
[0028] (5) Add n-hexane for stratification: Add 5.0ml of n-hexane into the PP separatory funnel, shake and let stand for stratification, ultrasonically oscillate for 3 minutes, and let stand for 5 minutes to take the up...
Embodiment 2
[0032] The steps of a pretreatment method for detecting boron impurities in titanium dioxide are as follows:
[0033] (1) Sampling: Weigh 1.0g sample of titanium dioxide into a PTFE beaker.
[0034] (2) Sample digestion: Add 2.5ml of nitric acid with a mass fraction of 70% and 2.0ml of hydrofluoric acid with a mass fraction of 49% to the beaker to completely digest the sample.
[0035] (3) Propylene glycol-complexed boron: add 10.0ml of water to the digestion solution to dilute, measure 2.0ml of propylene glycol into the beaker, ultrasonically oscillate for 5 minutes and then let stand for 10 minutes.
[0036] (4) Transfer and liquid separation: Pour the solution in the beaker into the PP separating funnel, wash the beaker, and put the washing liquid into the PP separating funnel.
[0037] (5) Add n-hexane for layering: Add 7.0ml of n-hexane into the PP separatory funnel, shake and let stand for stratification, ultrasonically oscillate for 5 minutes, and let stand for 10 minu...
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