Thermal Desorption Low Temperature Plasma Ionization Mass Spectrometry for Rapid and Sensitive Detection of Pesticides in Broomcorn
10.11895/j.issn.0253-3820.160660
- VernacularTitle:热解析低温等离子体电离源用于糯高粱中农药残留的快速筛查
- Author:
Shuang WANG
;
Zhe WANG
;
Keyong HOU
;
Haiyang LI
- Keywords:
Rapid detection of pesticide residues;
Thermal desorption sample introduction;
Low temperature plasma ion source;
Rectilinear ion trap;
Triple quadrupole mass spectrometry
- From:
Chinese Journal of Analytical Chemistry
2017;45(2):175-182
- CountryChina
- Language:Chinese
-
Abstract:
A thermal desorption low temperature plasma (TD-LTP) ionization was developed for rapid and sensitive detection of pesticides by direct mass spectrometry.The thermal desorption sampler was added in fount of the plasma generator.The sample was desorbed in the thermal desorption sampler firstly,and then the gas molecules were transported to the plasma generator by the carrier gas to be ionized.The utilization of thermal desorption sampler helps to shift the interaction of the gas phase plasma with the sample form gas-solid or gas-liquid to gas-gas,which increases the sensitivity and stability especially for non-volatile sample (e.g.pesticides) greatly compared with the traditional LTP ionization source.Under the optimal parameters of the thermal desorption LTP ionization source,the characteristic ions of 12 kinds of pesticides were investigated.Then the thermal desorption LTP ionization source was connected with the commercial ACQUITY TQD mass spectrometer to evaluate the pesticide residue level in broomcorn.
