Method for detecting content of benzene series in lithographic printing materials based on ionic liquid

A technology of ionic liquid and benzene series, which is applied in the field of chemical analysis and detection materials, can solve problems such as instability and inaccurate detection results of benzene series

Pending Publication Date: 2020-10-23
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to provide a method for detecting the content of benzene series in lithographic printed matter based on ionic liquid, so as to solve the problem of inaccurate and unstable detection results of benzene series in lithographic printed matter in the prior art;

Method used

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  • Method for detecting content of benzene series in lithographic printing materials based on ionic liquid
  • Method for detecting content of benzene series in lithographic printing materials based on ionic liquid
  • Method for detecting content of benzene series in lithographic printing materials based on ionic liquid

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Effect test

Embodiment 1

[0047] In this example, the method for detecting benzene series hazards in lithographic printed matter is detected by GC-MS method, and the detection data is analyzed by external standard method.

[0048] The method for detecting benzene series hazards in lithographic printed matter in this embodiment uses 1-butyl-3-methylimidazolium acetate ionic liquid as a solvent for the dispersion pretreatment of the sample, because 1-butyl-3-methyl Imidazolium acetate ionic liquid is easy to absorb water. Before using the ionic liquid that has been placed for a long time after opening, it is necessary to evaporate the ionic liquid at 80°C with a vacuum of 0.1MPa for 8 hours to ensure that all residual organic solvents are removed; if necessary , add alcohol to the ionic liquid, and carry out vacuum distillation after mixing until there is no distilled liquid. This method utilizes the strong hydrogen bond and mutual solubility between methanol and water, thereby destroying the Interaction...

Embodiment 2

[0077] Embodiment 2 precision and accuracy experiment

[0078] Use a paper cutter to cut the base paper of selected lithographic samples into six pieces of paper with an area of ​​0.5cm×0.5cm according to the above method, put them into six headspace bottles respectively, and add 1ml to each bottle with a concentration of 1mg / L standard sample, capped immediately.

[0079] The detection and analysis method in the above-mentioned embodiment 1 was used for parallel determination 6 times, and the repeatability detection results are shown in Table 2 below.

[0080] Table 2 Repeatability test results

[0081]

[0082] The data in Table 2 above shows that the relative standard deviations of the peak areas of the various benzene series components involved in the present invention are all less than 4%, which shows that the detection precision of this method is good.

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Abstract

The invention belongs to the technical field of chemical analysis and detection materials, and particularly relates to a method for detecting the content of benzene series in lithographic printing materials based on ionic liquid. According to the method for detecting the content of benzene series in the lithographic printing materials based on ionic liquid, a headspace gas chromatography-mass spectrometry method is adopted; imidazolyl acetate ionic liquid is used as a matrix correcting agent; the content of benzene and benzene series in the lithographic printing material is determined by usingan external standard method; good stability, diversity and relatively strong polarity of the ionic liquid are utilized, effective swelling of the cellulose of the paper product of the flat printed matter can be realized, benzene substances infiltrating into the paper can be effectively extracted so that the detection result is closer to the actual value, the dissolving stability of the whole detection process is further improved, and the effectiveness and the accuracy of the detection result are effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis and detection materials, and in particular relates to a method for detecting the content of benzene series in lithographic printed matter based on ionic liquids. Background technique [0002] With the rapid development of our country's economy and the continuous improvement of people's living standards, the problem of environmental pollution has increasingly attracted people's attention. As an important industrial sector of the national economy, China's printing industry is developing rapidly, but the environmental pollution caused by the printing industry is also becoming more and more prominent. [0003] Since the solvent-based ink used in printed matter contains a large amount of organic solvent, it will be transferred to the printed matter during the printing process. Among them, the common class of residual harmful substances is benzene series. Benzene series refers to the general...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8675G01N2030/047
Inventor 乔云黄蓓青魏先福
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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