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Method for digesting carbon material, and method for detecting multiple elements in carbon material

A carbon material and digestion solution technology, applied in the field of analytical chemistry, can solve problems such as large deviation, need for further research, complicated methods, etc., and achieve the effect of small deviation of results, wide application range and easy operation

Inactive Publication Date: 2018-11-16
ENN GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Carbon materials currently used in different fields usually contain various metals such as aluminum, iron, manganese, copper, zinc, cobalt, potassium, sodium, calcium, magnesium, molybdenum, titanium, and non-metallic elements such as silicon and phosphorus (such as impurities, It can be other metal elements and non-metal elements other than carbon), the content determination and analysis method of the above-mentioned other elements except carbon mainly adopts after the sample is processed by burning ash, and then utilizes lithium tetraborate to melt and then reuse the mass fraction of 3 % nitric acid to constant volume, using the principle of atomic emission spectroscopy to carry out instrumental analysis and detection, but this method is complicated and has large deviations
[0003] Therefore, the detection methods of various elements in carbon materials still need further research.

Method used

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  • Method for digesting carbon material, and method for detecting multiple elements in carbon material
  • Method for digesting carbon material, and method for detecting multiple elements in carbon material
  • Method for digesting carbon material, and method for detecting multiple elements in carbon material

Examples

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Embodiment

[0045] The embodiments described below all carry out according to the following steps:

[0046] Steps for preparing carbon material test samples:

[0047] 1) Preparation of acid solution: by volume ratio, the concentration of sulfuric acid of 1.61g / mL, perchloric acid of 1.19g / mL, nitric acid of 1.41g / mL is (1.5-15.0): (1.0-10.0 ): (0.3-3.0) mixed to obtain an acid solution, as a comparison, comparative examples 1 to 3 choose any two of the above three acids to mix, and the mixing ratio remains unchanged;

[0048] 2) Use a ten-thousandth balance to weigh the sample of the carbon material to be tested that is ground into a powder, and place it in a mortar and grind it to the required carbon material powder;

[0049] 3) Accurately weigh 0.1000g-1.0000g of the air-dried ground sample using a ten-thousandth balance, put it in a conical flask, and spread it flat;

[0050] 4) Slowly raise the electric heating plate from room temperature to 80°C to 150°C;

[0051] 5) adding an app...

Embodiment 1

[0068] Carry out according to the above steps, the difference is: add the acid solution of sulfuric acid, perchloric acid and nitric acid with a volume ratio of 5:1:1 into the conical flask with 0.1000 g of carbon material powder.

[0069] Shake and mix the mixed solution of carbon material powder and acid solution in Comparative Examples 1-3 and Example 1, and place the Erlenmeyer flask at 80°C to start heating and heat up, and treat under the same conditions, and compare the final clarity (each implementation Example operation five times), the clarity is in the order of Example 1>Comparative Example 3>Comparative Example 2>Comparative Example 1, it can be seen that the solubility of the carbon material powder in the acid solution mixed with three acids is greater than that of the carbon material powder in any of them. See Table 1 for the solubility in the acid solution obtained by mixing the two acids, and the mass statistics of the insoluble solid matter after 0.1000 g of ca...

Embodiment 2

[0073] Follow the above steps, the difference is: add sulfuric acid, perchloric acid, and nitric acid in the conical flask with 0.5000 g of carbon material powder in a volume ratio of 15:1:1, and the total volume is 15 mL.

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PUM

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Abstract

The invention provides a method for digesting a carbon material, and a method for detecting multiple elements in the carbon material. The digestion method comprises the following steps: mixing the carbon material with an acid solution, and heating the obtained mixed solution until the mixed solution is clarified and transparent in order to obtain a carbon material digested solution, wherein the acid solution contains sulfuric acid, perchloric acid and nitric acid. The inventors find that the carbon material can be fully dissolved in the acid solution under a heating condition to obtain the clarified and transparent carbon material digested solution in order to ensure the accuracy in the subsequent detection process; and the digestion method and the detection method are simple to operate, and are easy to enforce.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a method for digesting carbon materials and a method for detecting various elements in carbon materials. Background technique [0002] Carbon materials currently used in different fields usually contain various metals such as aluminum, iron, manganese, copper, zinc, cobalt, potassium, sodium, calcium, magnesium, molybdenum, titanium, and non-metallic elements such as silicon and phosphorus (such as impurities, It can be other metal elements and non-metal elements other than carbon), the content determination and analysis method of the above-mentioned other elements except carbon mainly adopts after the sample is processed by burning ash, and then utilizes lithium tetraborate to melt and then reuse the mass fraction of 3 % nitric acid constant volume, using the principle of atomic emission spectroscopy, instrumental analysis and detection, but this method is complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28G01N1/44
CPCG01N1/286G01N1/44G01N21/73G01N2001/2866
Inventor 鲍秀瑾李金来郑岩
Owner ENN GRAPHENE TECH CO LTD