title: Solid-state UV-MALDI mass spectrometric quantitation of fluroxypyr and triclopyr in soil.
abstract: The work presented here refers firstly to solid-state UV-MALDI-Orbitrap-mass spectrometric analysis of fluroxypyr (A) and triclopyr (B) in soils under laboratory conditions. The experimental design has involved the following: (a) determination of analytes A and B in polycrystalline composites of organic materials 1-7, based on 2-piperidine (pyrrolidine or piperazine)-1-yl-ethyl ammonium salts in order to determine the effect of sample preparation techniques on method performance using commercial herbicide formulations and (b) analysis of non-(X j,k,l (i) ) and sterilized (Y j,k,l (i) ) soil samples (i-fold rate 1, 10, 100, or 1,000; j-pesticide type A or B; k-time (0, 5, 10, 20, and 50 days) and l = 1-3 replicated samples) having clay content ∈ 5.0-12.0 %, silt ∈ 23.0-51.1 %, sand ∈ 7.2-72.0 %, and pH ∈ 4.0-8.1. In order to obtain a high representativeness of the data toward real-field experiments, the pollution scheme has involved 1-, 10-, 100-, and 1,000-fold rates. The firstfold rate has concentration of pollutant A of 2.639 × 10(-4) g in 625 cm(2) soil horizon of 0-25 cm(2) (5 cm depth) according to registration report (PSM-Zulassungbericht) of German Federal Office of Consumer Protection and Food Safety (Bundesamt für Verbraucherschutz und Lebensmittelsicherheit) 6337/26.10.2009. The experimental design has involved quincunx systematic statistical approach for collection of soil samples. The performance has been compared with the corresponding statistical variable obtained, using an independent HPLC-ESI-(APCI-)-MS/MS analysis.
authors.affiliation: Lehrstuhl für Analytische Chemie, Institut für Umweltforschung, Fakultät für Chemie, Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Nordrhein-Westfalen, Germany, B.Ivanova@web.de.
authors.forename: Bojidarka
authors.initials: B
authors.lastname: Ivanova
authors.forename: Michael
authors.initials: M
authors.lastname: Spiteller
mesh_terms: D000085:Acetates / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D004784:Environmental Monitoring / Q000379:methods; D006016:Glycolates / Q000032:analysis*; D006540:Herbicides / Q000032:analysis; D011725:Pyridines / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*; D053719:Tandem Mass Spectrometry
chemical_list: D000085:Acetates; D006016:Glycolates; D006540:Herbicides; D011725:Pyridines; D012987:Soil; D012989:Soil Pollutants; C416382:4,5-amino-3,5-dichloro-6-fluoro-2-pyridinyloxyacetic acid; C032742:triclopyr