Method for detecting components of elements in coated titanium dioxide

A technology of element composition and titanium dioxide, which is applied in the field of detection and analysis of coated titanium dioxide products, can solve the problems of interfering element composition content determination, absence or lack, etc., achieve the effect of reducing types and dosage, improving analysis speed, and shortening the inspection process

Active Publication Date: 2014-06-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Abstract
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  • Claims
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Problems solved by technology

[0008] Another object of the present invention is to solve the problem that particle size effect, mineral effect and other influencing factors interfere with the determination of elemental composition due to the difference in particle size, chemical form, elemental composition and content of coated titanium dioxide products, and / or Solve the problem that there is no or lack of corresponding titanium dioxide standard samples and forced to use titanium dioxide standard substances as the matrix and quantitatively add high-purity reagents such as silicon dioxide, aluminum oxide, zirconium dioxide, niobium pentoxide, etc. to artificially synthesize and prepare a concentration gradient Calibrate samples to prepare the difficult problem of drawing XRF calibration curve

Method used

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  • Method for detecting components of elements in coated titanium dioxide
  • Method for detecting components of elements in coated titanium dioxide

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preparation example Construction

[0018] XRF Calibration Sample Preparation Procedure

[0019] Use microwave digestion-ICP-OES method to determine the percentage of elemental composition of coated titanium dioxide products of different grades or standards actually produced under the same process conditions as the sample to be tested, and select 3-7 uniformity Good stability, element composition content can constitute a concentration gradient and its range covers a series of coated titanium dioxide samples of different grades or standards, and then repeat microwave digestion and ICP- For OES measurement, the statistical average value of the measurement results is used as the standard value of the elemental composition content, and then the coated titanium dioxide product selected and checked by this value is used as the XRF calibration sample.

example 1

[0036] Prepare XRF calibration samples and draw calibration curves

[0037] 1. Microwave digestion of coated titanium dioxide samples:

[0038]Weigh 0.2500 g of the coated titanium dioxide sample initially screened by XRF powder pressing semi-quantitative method into a microwave digestion tank, rinse the tank wall with 15 mL of water and disperse the sample, add 4 mL (1+1) sulfuric acid, 8 mL nitric acid and 2 mL hydrogen in sequence For hydrofluoric acid, immediately seal the container and carry out microwave digestion; the control conditions of microwave digestion are set as follows: adopt the ramp heating method, control the pressure in the container to be less than 800psi, first raise the temperature of the material in the container to 200°C for 10 minutes and keep it warm for 15 minutes, and then use 5 minutes to heat up to 230°C and keep warm for 5min. After the solution in the tank is cooled to room temperature, it is directly diluted with water and fixed in a 100mL pl...

example 2

[0051] First, the coated titanium dioxide sample to be tested (sample No. 2) was sieved through a 74 μm standard sieve, dried at (110±5)°C for 1 hour and cooled to room temperature, and 2 g of the sample powder was weighed and directly placed in a diameter In a mold such as a 40mm aluminum ring, spread it evenly and press it with a little pressure, then fill the entire mold with boric acid, apply a pressure of 15 tons on the press for 5 seconds, and press it into a sheet-shaped XRF calibration sample or to be tested Coated titanium dioxide samples.

[0052] Then, using the XRF calibration sample prepared in Example 1 and the drawn XRF calibration curve, measure the x-fluorescence intensity values ​​of the corresponding elemental components in the pressed sample of sample No. 2 and calculate the percentage content of the elemental components in the product.

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Abstract

The invention provides a method for detecting components of elements in coated titanium dioxide. The method comprises the following steps: selecting a plurality of coated titanium dioxide samples in two group; heating through microwaves to decompose the first group and obtain a solution of the samples to be detected, and detecting contents of the components of the elements through ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometry); pressing the second group into calibration samples by using a powder tabletting method and detecting fluorescence intensities of the components of the elements through XRF (X-Ray Fluorescence); enabling the detected fluorescence intensities to be associated with the contents of the components to form a calibration curve of each element in each coated titanium dioxide sample; pressing the coated titanium dioxide samples to be detected into sample pieces to be detected by using a method which is as same as the powder tabletting method, and detecting the fluorescence intensities of the elements to be detected through XRF; and calculating the contents of the components of the elements to be detected by combining the calibration curves according to the fluorescence intensities of the elements to be detected. The method for detecting components of elements in the coated titanium dioxide is capable of detecting the contents of the components of the elements such as zirconium, aluminum, silicon, phosphorus, niobium, iron, chromium, manganese and copper in the coated titanium dioxide; meanwhile, the method is good in analysis speed, accuracy and precision.

Description

technical field [0001] The invention belongs to the technical field of detection and analysis of coated titanium dioxide products, in particular, it relates to a method capable of determining elements such as zirconium, aluminum, silicon, phosphorus, niobium, iron, chromium, manganese and copper in coated titanium dioxide . Background technique [0002] Generally, titanium dioxide is a very important industrial raw material, which is widely used in coatings, plastics, inks, chemical fibers, medicine, papermaking, cosmetics, etc. Coated titanium dioxide (also known as nuclear-coated titanium dioxide) is manufactured by using zirconium, silicon, aluminum, phosphorus, niobium and other inorganic salt treatment agents to modify the surface of ordinary titanium dioxide by multi-component or unit coating technology. Upgraded products, that is, coating one or more layers of inorganic hydrated oxides on the surface of titanium dioxide particles to block lattice defects and improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/223G01N21/73
Inventor 成勇彭慧仙袁金红
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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