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Method for detecting content of titanium dioxide in emulsion or milk powder

A detection method and technology of titanium dioxide, which are applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problems of health hazards, the inability to complete the detection test by the wet digestion method, and the inconclusiveness of soluble titanium compounds, and achieve economical savings. Energy and environmental protection, low element loss and pollution rate, and stable test results

Active Publication Date: 2010-02-10
INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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Problems solved by technology

[0003] Titanium dioxide itself is non-toxic, but some toxicological experiments show that titanium dioxide can accumulate in the face and muscle tissue, which is harmful to health
Moreover, the research on soluble titanium compounds has not been concluded so far.
[0004] GB / T21912-2008 "Determination of Titanium Dioxide in Food" can be used for wet detection by us, but due to the diversity of our detection products, the wet digestion method cannot complete the detection test, so the development of dry detection becomes necessary

Method used

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  • Method for detecting content of titanium dioxide in emulsion or milk powder
  • Method for detecting content of titanium dioxide in emulsion or milk powder
  • Method for detecting content of titanium dioxide in emulsion or milk powder

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The drawing of embodiment 1 standard curve

[0031] 1. Preparation of standard solution

[0032] Preparation of titanium standard solution: Accurately draw the elemental standard stock solution (concentration: 1000μg / ml, single standard purchased by the National Standard Material Research Center), make the stock solution with 5% nitric acid into a 10μg / ml intermediate solution, and then take the intermediate solution Solutions Prepare a series of solutions. Accurately draw the intermediate solution according to the volume listed in Table 1 and accurately set the volume to the mark in a 50ml volumetric flask.

[0033] Table 1 The amount of stock solution required to prepare the standard series of solutions (unit: ml)

[0034]

[0035] 2. Reagents

[0036] (1) Preparation of 5% nitric acid

[0037] Accurately take 50ml of concentrated nitric acid (high-grade pure), put it into a beaker filled with 100ml of ultrapure water, transfer it to a 1000ml volumetric flask a...

Embodiment 2

[0062] METHODS: The OPtima5300DV inductively coupled plasma optical emission spectrometer (ICP-OES) produced by Perkin-Elmer, USA was used to determine titanium dioxide in emulsion or milk powder.

[0063] Experimental steps for detecting elements:

[0064] 1. Instrument preparation:

[0065] (1) Turn on the host and operating software, adjust the instrument to the best state, turn on the argon gas and water cooling cycle, and preheat for four hours.

[0066] 2. Sample preparation: Weigh 4.0g-5.0g of emulsion or milk powder sample, put it into a 100ml porcelain crucible, carbonize the weighed sample on a heating plate at low temperature (not boiling), and then put it into a high temperature furnace at 550°C ℃, 30min ash to remove its components, then take it out and use 1:1 (V / V) nitric acid to destroy other components, heat it to dryness at a temperature of 70-80℃, put it in a muffle furnace at 550℃, and ash again for 1h, Take it out and cool it, then transfer it to a 50ml ...

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Abstract

The invention relates to a method for detecting content of titanium dioxide in emulsion or milk powder, comprising the following steps: 1) making standard curve of titanium standard solution; 2) sampling; 3) treating a sample; 4) detecting the sample and 5) comparing sample detection results with the standard curve to obtain the content of the titanium dioxide in the sample. The detecting equipment of the invention is an inductively coupled plasma-emitting spectrometer. The detection limit of the spectrometer by using the method is 0.0012mu g / mL, the correlation coefficient r is more than 0.999, and the recovery rate is 93.2%-99%. The method can fast and accurately detect the content of titanium dioxide in emulsion or milk powder, has small probability of element loss and pollution in thepreparation process of sample, accurate and reliable results, good repetitiveness and high sensitivity.

Description

technical field [0001] The invention relates to a method for detecting the content of titanium dioxide in emulsion or milk powder, in particular to a method for measuring the content of titanium dioxide in emulsion or milk powder by using an inductively coupled plasma emission spectrometer, which belongs to the technical field of chemical component detection. Background technique [0002] Titanium dioxide scientific name titanium dioxide (TiO 2 ), molecular weight: 79.88, is a white inorganic pigment, characterized by non-toxic, best opacity, best whiteness and brightness, is considered to be the best white pigment in the world, widely used in coatings , plastics, paper, printing ink, chemical fiber, rubber, cosmetics and food industries. Titanium dioxide is widely used as a colorant in packaging and raw material additives in the dairy industry. [0003] Titanium dioxide itself is non-toxic, but some toxicological experiments show that titanium dioxide can accumulate in th...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/44
Inventor 其其格常建军刘卫星
Owner INNER MONGOLIA MENGNIU DAIRY IND (GRP) CO LTD
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