We have successfully studied the analytical method of polar pesticides like carbofuran, pirimicarb, thiodicarb, atrazine, simazine, carbaryl, diuron, isoprocarb in surface water and sediment by HPLC-UV. The method could be applied to HPLC- MS. The stable recoveries ranged from 79 – 110 % with surface water and sediment samples. Especially, a cleanup procedure combined QuEChERS method and solid phase extraction has been developed to analyse these compounds in sediment, a very complex matrix. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 18, SOÁ T3 - 2015 Multi-residue analysis of polar pesticides in surface water and sediment by high performance liquid chromatography Truong Lam Son Hai Nguyen Thi Thuy Trang Tran Ngoc Huyen Tran Thi Nhu Trang University of Science, VNU-HCM (Received on December 12 th 2014, accepted on August 12 th 2015) ABSTRACT We have successfully studied the 79 – 110 % with surface water and sediment analytical method of polar pesticides like samples. Especially, a cleanup procedure carbofuran, pirimicarb, thiodicarb, atrazine, combined QuEChERS method and solid simazine, carbaryl, diuron, isoprocarb in phase extraction has been developed to surface water and sediment by HPLC-UV. analyse these compounds in sediment, a very complex matrix. The method could be applied to HPLC- MS. The stable recoveries ranged from Key words: QuEchERs, sediment, pesticides, surface water, HPLC – UV. INTRODUCTION The polar pesticides (logKow – ) as simazine, atrazine (triazine herbicides), thiodicarb, pyrimicarb, carbofuran, carbaryl, isoprocarb (carbamate insecticide) and diuron (phenylurea herbicides) have been widely used due to their properties. They strongly dissolve in water and persist in the environment. Hence, according to the European Union directive on water quality (98/83/EC) the maximum concentration admissible for levels of pesticide residues in drinking and surface water is μg L-1 for individual and μg L-1 for the sum of pesticides [1]. The analysis of sediments should be included in environmental studies because they are the result of the integration of all processes (biological, physical and chemical) that occur in an aquatic ecosystem, influencing the metabolism of the whole system. Sediments are very different in composition forms and processes and can provide valuable information about water quality [2]. Trace analysis of organic contaminants such as pesticides in environmental samples typically consist of following
