Analysis of Pesticides in Food and Environmental Samples - Chapter 5 pdf

... Animal Origin 134 5. 2.3 Estimation of Uncertainty of Sampling 1 35 5.3 Sample Preparation and Processing 136 5. 4 Stability of Residues 138 5. 4.1 Stability during Storag e 138 5. 4.2 Stability of Residues ... 127 5. 1.2.1 Uncertainty of the Measurement Results 128 5. 1.2.2 Systematic Error—Bias of the Measurements 130 5. 2 Sampling 132 5. 2.1 Quality of Samples 13...

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... LLC. 2 Sample Handling of Pesticides in Food and Environmental Samples Esther Turiel and Antonio Martín-Esteban CONTENTS 2.1 Introduction 36 2.2 Sample Pretreatment 36 2.2.1 Drying 37 2.2.2 Homogenization ... for the whole auto- mation of the process. Time (min) Time (min) 0 5 0 5 10 15 123 45 With MISPE Without MISPE 0 50 0 0 50 0 1000 150 0 2000 250 0 mAU (244 n...

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... The selection of 6 6 min 10 20 30 40 LU 5 5 .5 6 6 .5 7 7 .5 1 2 3 4 5 6 min 10 20 30 40 LU 8 12 16 20 min 10 (a) (b) (c) 20 30 40 LU 7 .5 12 .5 17 .5 22 .5 1 2 3 4 5 FIGURE 8.3 HPLC-Fl chromatograms. ... 32.00 7 8 42 15. 30 15. 40 15. 50 15. 60 15. 70 15. 80 15. 90 Time (min) Abundance Ion 200 → Ion 201 → Ion 2 15 → 20,000 60,000 100,000 140,000 180,000 220,000 Time (min)...

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... dichlorvos, and isofenphos. 34 In a recent study, the efficiency of trapping gaseous current-used pesticides on different traps, including PUF, XAD-2 resin, XAD-4 resin, and PUF=XAD-2=PUF and PUF=XAD-4=PUF ... internal standard method by using 2,3-diethyl -5 - methylpyrazine and quinazoline. Detection limits and uncertainty of all the methods (extraction and GC–NPD analysi...

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... H 13 ClN 6 2-( 4-Chloro-6-ethylamino- 1,3 , 5- triazin-2-ylamino )- 2-methylpropionitrile 2.0 3 10 À 4a 2.1 171 ca. 14 Metribuzin C 8 H 14 N 4 OS 4-Amino-6-tert -butyl- 4 , 5- dihydro-3-methylthio- 1,2,4-triazin -5 - one 0. 058 a 1.6 ... ( 258 C) Half-Life in Soil (Days) Atrazine C 8 H 14 ClN 5 6-Chloro-N 2 -ethyl-N 4 - isopropyl-1,3 , 5- triazine- 2,4-diamine 3.8 3 10 À...

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... Llorent-Martinez, E.J., Ortega-Barrales, P., and Molina-Diaz, A. Determination of thiabendazole residues in citrus fruits using a multicommuted fluores- cence-based optosensor. Anal. Chim. Acta, 55 7(1–2), ... 45 57 , 2003. 38. Chuang, J.C., Van Emon, J.M., Reed, A.W., and Junod, N. Comparison of immunoassay and gas chromatography-mass spectrometry methods for measuring 3 ,5, 6-tr...

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... EPA Method 50 7 nitrogen- and phosphorus-containing pesticides in water. Jackson and Andrews [44] evaluated the use of SPME under nonequilibrium conditions for analysis of organochlorine pesticides. ... discrimination of background [70]. (a) Bifenthrin Bifenthrin Permethrin Permethrin Cyfluthrin Cyfluthrin Cypermethrin λ-Cyhalothrin λ-Cyhalothrin (b) FIGURE 9.2 GC chromatogr...

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... http:==www.daff.gov.au=agriculture -food= nrs=industry-info=mrl=australian-international 6. http:==www.nzfsa.govt.nz=policy-law=legislation =food- standards=mrl-2006=nzmrlfs2006 -consolidation .pdf 7. http:==www.mohfw.nic .in= pfa%20acts%2 0and% 20rules .pdf 8. ... Chem., 66, 3 35, 1994. 26. FAO=WHO, Pesticides in Food 20 05, Report of the joint meeting of the FAO panel of Exper...

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... protocols; (5) adequate reporting of the results in the more meaningful manner; and (6) estima- tion of the monitoring program cost. 12.2.2 SELECTION OF PESTICIDES FOR MONITORING The number and nature of ... carbofuran) and pyrethrines (cyperme- thrin, deltamethrin, permethrin) have been also detected in urine samples [66–68]. Except of human biological samples, the...

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... rate of decontamination of a body of water, for guiding sampling schedules (what medium to sample, and how fre- quently), and for contrasting behavior of individual chemicals in a series of chem- icals. ... behavior and fate also operate within organisms and in communities and ecosystems. Concerns over endocrine disruption and decline of whole genera of amphibian...

Ngày tải lên: 11/08/2014, 12:21