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Application of doping agent in test of phthalic acid ester compounds by use of ion mobility spectrometry

A phthalate, ion mobility spectrometry technology, applied in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve the problems of time-consuming, labor-intensive, high cost, and achieve the effect of improving selectivity and sensitivity

Inactive Publication Date: 2014-06-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is time-consuming and expensive

Method used

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  • Application of doping agent in test of phthalic acid ester compounds by use of ion mobility spectrometry
  • Application of doping agent in test of phthalic acid ester compounds by use of ion mobility spectrometry
  • Application of doping agent in test of phthalic acid ester compounds by use of ion mobility spectrometry

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Experimental program
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Embodiment 1

[0031] figure 2 The ion mobility spectrum of air and the ion mobility spectrum of acetone in positive ion mode. It can be seen from the figure that when acetone is not added to the carrier gas, the ion mobility spectrum of air is more complicated, except for the main peak ion at 11.43ms, there are other impurity ions; when acetone is added to the carrier gas as a doping When impurity is used, the acetone positive ion peak at 13.54ms is mainly formed, which purifies the background spectrum peak and is beneficial to the accurate measurement of phthalates.

Embodiment 2

[0033] image 3 Ion mobility spectrometry detection spectrum of five phthalate compounds using acetone as dopant. Under the condition of acetone as the dopant in the positive ion mode, dimethyl phthalate forms a characteristic peak with a migration time of 15.63ms, and diethyl phthalate forms a characteristic peak with a migration time of 17.41ms. Dibutyl diformate forms a characteristic peak with a migration time of 21.03ms, dinonyl phthalate forms a characteristic peak with a migration time of 28.24ms, and didecyl phthalate forms a characteristic peak with a migration time of 29.45ms. As the molecular weight increases, the migration time of phthalates increases, and this method can effectively identify different types of phthalates.

Embodiment 3

[0035] Figure 4 It is the ion mobility spectrometry quantitative detection spectrum of three phthalate compounds with acetone as dopant in positive ion mode. It can be seen from the figure that the method can realize the quantitative detection of phthalates within three orders of magnitude, and the detection limit can reach 50 pg.

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Abstract

The invention relates to a method for rapid and sensitive test of phthalic acid ester compounds. An ion mobility spectrometry technology using a radioactive source as an ionization source is used as a basic test technology, and in the positive ion mode, a doping agent is added into a circulation gas path to establish the method for test of the phthalic acid ester compounds. Background spectrum peaks of an ion mobility spectrum in the positive ion mode can be purified by addition of the doping agent, and selectivity and sensitivity of the test of the phthalic acid ester compounds can be improved.

Description

technical field [0001] The invention relates to a detection method for realizing high selectivity and high sensitivity of phthalate compounds. The method uses the ion mobility spectrometry of the radioactive ionization source as the basic detection technology. In the positive ion mode, by adding a volatile dopant in the circulating gas path, a high selectivity and high sensitivity of phthalate compounds are established. detection method. The method realizes the selective reaction through the proton affinity of the dopant, purifies the background spectrum peak in the positive ion mode of the ion mobility spectrometer, and improves the selectivity and sensitivity of the detection of the phthalates. Background technique [0002] Phthalates are a class of softening chemicals that are often used as plasticizers and are widely used in toy manufacturing, food packaging, medical blood bags and hoses, vinyl floors and wallpapers, cleaners, lubricants and personal care products. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64
Inventor 李海洋程沙沙李京华陈创王卫国彭丽英
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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