Method for rapidly detecting component content of coal tar

A technology of component content and detection method, which is applied in the direction of measuring devices, material separation, and analysis of materials, can solve the problems of complex extraction steps, long detection time, and long time consumption, so as to reduce analysis errors and save detection time and costs low cost effect

Inactive Publication Date: 2010-07-21
河南海星化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the current gas chromatography method, the Ministry of Metallurgical Standard YB / T5078-2001—the gas chromatography method for the determination of coal tar naphthalene content has the defects of long time consumption, large error, and incomplete extraction of the detected content.
For example, in the determination of the naphthalene content in coal tar, using this method to detect the naphthalene content in coal tar requires multiple extractions of naphthalene with n-dodecane, the extraction steps are complicated, and the detection is often time-consuming. Long, the error is large, the extraction is not thorough, the efficiency is low, and the cost of n-dodecane is also high, and the investment in cost is also increased

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A rapid detection method for coal tar component content, comprising the steps of:

[0014] Step 1: Get 0.0501 grams of commercially available refined naphthalene (naphthalene content 99.5%), weigh to 0.0001 grams, 50 milliliters of xylene, put refined naphthalene and xylene in a 50 milliliter volumetric flask, and make 50 milliliters of naphthalene after dissolving Standard solution, spare;

[0015] Step 2: adopt gas chromatograph, analyze naphthalene standard solution, record the result, draw the peak area of ​​naphthalene as 140;

[0016] Step 3: Take 0.5010 g of coal tar, weigh to 0.0001 g, and 25 ml of xylene, put the coal tar and xylene into a volumetric flask, heat to 50°C, and use a heating ultrasonic instrument to help the coal tar sample dissolve completely. After dissolving, add xylene to make the solution constant to 50 milliliters to prepare a sample solution, which is cooled and set aside;

[0017] Step 4: the sample solution obtained in the step 3 is fil...

Embodiment 2

[0020] A rapid detection method for coal tar component content, comprising the steps of:

[0021] Step 1: Get 0.0505 grams of refined naphthalene (naphthalene content 99.5%), weigh to 0.0001 grams, 50 milliliters of xylene, put refined naphthalene and xylene in a 50 milliliter volumetric flask, dissolve as a naphthalene standard solution, and set aside;

[0022] Step 2: adopt gas chromatograph, analyze naphthalene standard solution, record the result, draw the peak area of ​​naphthalene as 145;

[0023] Step 3: Take 0.5100 g of coal tar, weigh to 0.0001 g, and 25 ml of xylene, put the coal tar and xylene into a volumetric flask, heat to 80°C, and use a heating ultrasonic instrument to help the coal tar sample dissolve completely. After dissolving, add xylene to make the solution constant to 50 milliliters to obtain a sample solution, which is cooled and set aside;

[0024] Step 4: Filter the sample solution prepared in step 3 with a 0.45um microporous organic filter membrane....

Embodiment 3

[0027] A rapid detection method for coal tar component content, comprising the steps of:

[0028] Step 1: Get 0.0510 grams of refined naphthalene (naphthalene content 99.5%), weigh to 0.0001 gram, 50 milliliters of dimethylbenzene, put refined naphthalene and dimethylbenzene in a 50 milliliter volumetric flask, obtain 50 milliliters of solution after dissolving, as Naphthalene standard solution, spare;

[0029] Step 2: adopt gas chromatograph, analyze naphthalene standard solution, record the result, draw the peak area of ​​naphthalene as 150;

[0030] Step 3: Take 0.5060 g of coal tar, weigh to 0.0001 g, and 25 ml of xylene, put the coal tar and xylene into a volumetric flask, heat to 65°C, and use a heating ultrasonic instrument to help the coal tar sample dissolve completely. After dissolving, add xylene to make the solution constant to 50 milliliters to prepare a sample solution, which is cooled and set aside;

[0031] Step 4: Filter the sample solution prepared in step ...

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Abstract

The invention provides a method for rapidly detecting naphthalene component concentration in coal tar, relating to a detection method of coal tar components, which comprises the following steps: dissolving refined naphthalene and dimethylbenzene to prepare a naphthalene standard solution, and analyzing the naphthalene standard solution records with a gas chromatography to calculate a peak area of the naphthalene; dissolving the coal tar and the dimethylbenzene by heating to 50-80 DEG C to prepare a sample solution, injecting the sample solution into a quartz capillary column, and controlling the parameter record results, such as time, temperature and the like to obtain the peak area of the naphthalene in the sample solution; and comparing and calculating the peak area of the naphthalene in the naphthalene standard solution and the measured peak area of the naphthalene in the sample solution, thus obtaining the naphthalene component concentration in the coal tar components. The invention has the following advantages: utilizing the dissolution method instead of a traditional extraction method; saving detection time by 50%, and saving consumptive materials by 60% due to low dimethylbenzene cost; and reducing analysis error, with more than 99.8% of accuracy and more than 99.5% of precision.

Description

technical field [0001] The invention relates to a method for detecting coal tar components, in particular to a rapid detection method for the content of coal tar naphthalene components. Background technique [0002] Gas chromatography has been widely used in many fields due to its fast, efficient, high sensitivity and other characteristics. In the field of chemical industry, gas chromatography is also used for the detection of some raw materials. Under certain chromatographic conditions, the detection and analysis are performed according to the linear relationship between the content of the material components and the peak area. However, in the current gas chromatography method, the Ministry of Metallurgical Standard YB / T5078-2001—the gas chromatography method for the determination of coal tar naphthalene content has the defects of long time consumption, large error, and incomplete extraction of the detected content. For example, in the determination of the naphthalene cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 张启福张卫国
Owner 河南海星化工科技有限公司
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