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Studies on the Analysis Method of Organochlorine Pesticides in Food

Author: ShenYanHua
Tutor: LiLei；ChenDaZhou
School: Beijing University of Chemical Technology
Course: Physical and chemical
Keywords: Organochlorine pesticides Pre-treatment method Gas Chromatography Analytical methods
CLC: TS207.53
Type: Master's thesis
Year: 2005
Downloads: 275
Quote: 0
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Abstract


Organochlorine pesticides are a class of persistent organic pollutants ( POPs ) , can enter the body through food , and accumulation in the human body , may cause potential harm to human health . Therefore , the detection of organochlorine pesticides in food has been hampered by the attention . Papers for our food , especially the lack of analytical methods for trace organochlorine pesticides in marine animals, food , fish and shellfish trace organochlorine pesticides accurate measurement method . Determine the sample pre-treatment technology , and established the use of gas chromatography - electron capture detector the instrument analysis method for the simultaneous detection of 16 organochlorine pesticides . Sample pre-treatment process using Accelerated Solvent Extractor (ASE) extraction, gel permeation chromatography (GPC) and fill Florisil soil solid phase extraction (SPE) column associated with purification . Papers were on the ASF the best extraction temperature , static cycles discussed Soxhlet extraction , and under the best conditions were compared . The results show that , ASE is an alternative to a simple and rapid method of extracting Soxhlet extraction . GPC and solid-phase extraction and purification conditions for 16 organochlorine pesticides were optimized . 16 organochlorine pesticides through the pre-treatment methods recoveries ranged from 80.8 to 109.6% , the relative standard deviation of repeated experiments between 1.2 to 14.0% . Research and determine the GC-ECD simultaneously measuring 16 organochlorine pesticides GC conditions . In certain conditions , 16 organochlorine pesticides can be effectively separated , repeat the analysis of 16 organochlorine pesticides mixed standard sample relative standard deviation of less than 1 % , the detection limit of the method (2 times the signal-to-noise ratio ) 0.2 ~ 0.5ng / g. Foregoing has established pre-processing method and GC-ECD analysis method than the analysis of the samples of the two international test , indicating that the establishment of pre-processing method and GC-ECD

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CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > General issues > Food standards and testing > Determination of food contamination > Determination of pesticide residues
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