Agent orange herbicides, organophosphate and triazinic pesticides analysis in olive oil and industrial oil mill waste effluents using new organic phase immunosensors
摘要:
New immunosensors working in organic solvent mixtures (OPIEs) for the analysis of traces of different pesticides (triazinic, organophosphates and chlorurates) present in hydrophobic matrices such as olive oil were developed and tested. A Clark electrode was used as transducer and peroxidase enzyme as marker. The competitive process took place in a chloroform-hexane 50% (V/V) mixture, while the subsequent enzymatic final measurement was performed in decane and using tert-butylhydroperoxide as substrate of the enzymatic reaction. A linear response of between about 10 nM and 5.0 mu M was usually obtained in the presence of olive oil. Recovery tests were carried out in commercial or artisanal extra virgin olive oil. Traces of pesticides were also checked in the oily matrix, in pomace and mill wastewaters from an industrial oil mill. Immunosensors show good selectivity and satisfactory precision and recovery tests performed in olive oil gave excellent results. (C) 2014 Elsevier Ltd. All rights reserved.
Shao-Yong, Wu; Eto, Morifusa, Agricultural and Biological Chemistry, 1984, vol. 48, # 12, p. 3071 - 3080
作者:Shao-Yong, Wu、Eto, Morifusa
DOI:——
日期:——
Hirashima, Akinori; Eto, Morifusa, Agricultural and Biological Chemistry, 1983, vol. 47, # 12, p. 2831 - 2840
作者:Hirashima, Akinori、Eto, Morifusa
DOI:——
日期:——
Agent orange herbicides, organophosphate and triazinic pesticides analysis in olive oil and industrial oil mill waste effluents using new organic phase immunosensors
New immunosensors working in organic solvent mixtures (OPIEs) for the analysis of traces of different pesticides (triazinic, organophosphates and chlorurates) present in hydrophobic matrices such as olive oil were developed and tested. A Clark electrode was used as transducer and peroxidase enzyme as marker. The competitive process took place in a chloroform-hexane 50% (V/V) mixture, while the subsequent enzymatic final measurement was performed in decane and using tert-butylhydroperoxide as substrate of the enzymatic reaction. A linear response of between about 10 nM and 5.0 mu M was usually obtained in the presence of olive oil. Recovery tests were carried out in commercial or artisanal extra virgin olive oil. Traces of pesticides were also checked in the oily matrix, in pomace and mill wastewaters from an industrial oil mill. Immunosensors show good selectivity and satisfactory precision and recovery tests performed in olive oil gave excellent results. (C) 2014 Elsevier Ltd. All rights reserved.
Stereoselective synthesis of both enantiomers of P-chirogenic 2-oxo-2-thio-1,3,2-oxazaphosphorinane tetramethylammonium salt as key precursors to structurally diverse chiral derivatives
作者:Marian Mikołajczyk、Jerzy Łuczak、Lesław Sieroń、Michał W. Wieczorek
DOI:10.1016/j.tet.2011.10.085
日期:2012.1
A fully stereoselective synthesis of both enantiomers of 2-oxo-2-thio-1,3,2-oxazaphosphorinanyl salt has been accomplished in five steps with an overall 40–45% yield starting from the diastereoisomeric N-methylstrychninium salts of methyl p-nitrophenyl phosphorothioic acid. Their conversion to the enantiomeric forms of methyl p-nitrophenyl phosphorochloridothionate as a two-step phosphorylating agent