Simultaneous determination of 109 pesticides in unpolished rice by a combination of gel permeation chromatography and Florisil column purification, and gas chromatography/mass spectrometry

2006 ◽  
Vol 20 (4) ◽  
pp. 609-617 ◽  
Author(s):  
Wei-Guo Zhang ◽  
Xiao-Gang Chu ◽  
Hui-Xia Cai ◽  
Juan An ◽  
Chong-Jiu Li
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Gel Permeation Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Florisil Column ◽  
Chromatography Mass Spectrometry ◽  
Gel Permeation ◽  
Unpolished Rice

Determination of Hexachlorocyclohexane (HCH) in Panax notoginseng of Chinese Traditional Medicine by Gas Chromatography/Mass Spectrometry

2013 ◽  
Vol 830 ◽  
pp. 422-425
Author(s):  
Na Wu ◽  
Bo Zhou ◽  
He Ping Yan ◽  
Shi Juan Xu ◽  
Yun Hui Long ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Traditional Medicine ◽  
Gel Permeation Chromatography ◽  
Panax Notoginseng ◽  
Gas Chromatography Mass Spectrometry ◽  
Chinese Traditional Medicine ◽  
Chromatography Mass Spectrometry ◽  
Gel Permeation

A novel method was developed for the determination of HCH in Panax Notoginseng of Chinese traditional medicine by ultrasonic extraction (UE) coupled with Gel Permeation Chromatography and Gas Chromatography/Mass spectrometry. Some important parameters that influence the extraction and purification efficiency were investigated. The optimum condition Panax Notoginseng of Chinese traditional medicine was extracted with dichloromethane about 20mL, extracting times and extracting time were one and 30min. The extracts were cleaned up by Gel Permeation Chromatography, and determined by Gas Chromatography /Mass spectrometry. Under the optimum condition, the mean recoveries of the method were 83.23%, the relative standard deviations (RSD) were 3.45%, which has been under the demand of the determination of HCH in Panax Notoginseng of Chinese traditional medicine.

Determination of 10 photo-initiator residues in food plastic packaging by gel permeation chromatography extraction coupled with gas chromatography-mass spectrometry

2015 ◽  
Vol 7 (21) ◽  
pp. 9026-9031 ◽  
Author(s):  
HuiMei Cai ◽  
GuangZhi Shang ◽  
JuZhou Zhang ◽  
GuShuai Tao ◽  
GuiJie Chen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Analytical Method ◽  
Food Packaging ◽  
Gel Permeation Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Plastic Packaging ◽  
Chromatography Mass Spectrometry ◽  
Gel Permeation

An analytical method based on GPC coupled with GC-MS for the determination of 10 photo-initiators –BP,2-MBP,Irgacure 184,3-MBP,4-MBP,EDB,Irgacure 651,OMBB,EHAandITX– in plastic food packaging.

Simultaneous determination of 118 pesticide residues in Chinese teas by gas chromatography-mass spectrometry

2009 ◽  
Vol 63 (1) ◽  
Author(s):  
Xin Yang ◽  
De Xu ◽  
Jian Qiu ◽  
Hua Zhang ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Simultaneous Determination ◽  
Pesticide Residues ◽  
Residue Analysis ◽  
Gel Permeation Chromatography ◽  
Gas Chromatography Mass Spectrometry ◽  
Chromatography Mass Spectrometry ◽  
Relative Standard

AbstractAn efficient and sensitive method for simultaneous determination of 118 pesticide residues in teas has been established and validated. A multi-residue analysis of pesticides in tea involved extraction with ethyl acetate-hexane, clean-up using gel permeation chromatography (GPC) and solidphase extraction (SPE), and subsequent identification and quantification of the selected pesticides by gas chromatography-mass spectrometry (GC-MS). For most of the target analytes, optimized pretreatment processes led to no significant interference with analysis of sample matrix, and the determination of 118 compounds was achieved in about 60 min. In the linear range of each pesticide, the correlation coefficient was R 2 ≥ 0.99. At the low, medium and high three fortification levels of 0.05–2.5 mg kg−1, 118 pesticides average recoveries range from 61 % to 121 % and relative standard deviations (RSD) were in the range of 0.6–9.2 % for all analytes. The limits of detection for the method were 0.00030-0.36 mg kg−1, depending on each pesticide.

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