By Mark A. Brown
content material: assessment of the improvement of liquid chromatography/mass spectrometry / Thomas Cairns and Emil G. Siegmund --
ideas for boosting structural details from high-performance liquid chromatography/mass spectrometry / Robert Voyksner, Terry Pack, Cynthia Smith, Harold Swaisgood, and David Chen --
affirmation of pesticide residues via liquid chromatography/tandem mass spectrometry / Thomas Cairns and Emil G. Siegmund --
Use of solvent adduct ions to substantiate constitution of chosen herbicides with thermospray liquid chromatography/mass spectrometry / Damià Barceló --
research of chlorinated herbicides by means of high-performance liquid chromatography/mass spectrometry / Tammy L. Jones, L. Donnelly Betowski, and Jehuda Yinon --
Multiresidue research of thermally labile sulfonylurea herbicides in vegetation through liquid chromatography/mass spectrometry / Lamaat M. Shalaby and Stephen W. George --
purposes of liquid chromatography/negative ion mass spectrometry in reviews of herbicide metabolism / R.T. Solsten, H. Fujiwara, and E.W. Logusch --
research of xenobiotic conjugates by way of thermospray liquid chromatography/mass spectrometry / Deanne M. Dulik, George Y. Kuo, Margaret R. Davis, and Gerald R. Rhodes --
Qualitative research of prescribed drugs through thermospray liquid chromatography/mass spectrometry : nemadectins and tetracyclines / furnish B. Kenion, man T. Carter, Jaweed Ashraf, Marshall M. Siegel, and Donald B. Borders --
Quantification of endogenous retinoic acid in human plasma through liquid chromatography/mass spectrometry / C.A. Huselton, B.E. Fayer, W.A. Garland, and D.J. Liberato --
Liquid chromatography/mass spectrometry in bioanalysis / W.M.A. Niessen, U.R. Tjaden, and J. van der Greef --
tracking in vivo cyclic acetylation and deacetylation of the anticonvulsant LY201116 in rats : use of D₃-N-acetyl LY201116 and liquid chromatography/mass spectrometry/thermospray mass spectrometry / A.P. Breau, C.J. Parli, B.D. Potts, and R.M. Goodwin --
research of aim and nontarget pollution in aqueous and dangerous waste samples via liquid chromatography/particle beam mass spectrometry / Mark A. Brown, In Suk Kim, Fassil I. Sasinos, and Robert D. Stephens --
program of blend ion resource to notice environmentally very important compounds / M.L. Vestal, D.H. Winn, C.H. Vestal, and J.G. Wilkes --
Particle beam liquid chromatography/mass spectrometry of phenols and their sulfate and glucuronide conjugates / F. Reber Brown and William M. Draper --
Mass spectrometry of the secondary metabolites of benzo[a]pyrene : ionization from liquid matrices / Rudolf H. Bieri and John Greaves --
Anion trade thermospray tandem mass spectrometry of polar urinary metabolites and metabolic conjugates / William M. Draper, F. Reber Brown, Robert Bethem, and Michael J. Miille --
Structural experiences of in vitro alkylation of hemoglobin by way of electrophilic metabolites / S. Kaur, D. Hollander, R. Haas, and A.L. Burlingame.
Read Online or Download Liquid Chromatography/Mass Spectrometry. Applications in Agricultural, Pharmaceutical, and Environmental Chemistry PDF
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Extra info for Liquid Chromatography/Mass Spectrometry. Applications in Agricultural, Pharmaceutical, and Environmental Chemistry
Example text
Parker et a l (29) were the f i r s t group that demonstrated the chloride-attachment w i t h a d d i t i o n of 1% c h l o r o a c e t o n i t r i l e i n the eluent i n negative chemical i o n i z a t i o n d i r e c t l i q u i d i n t r o d u c t i o n (NCI DLI) LC-MS u s i n g a s p l i t i n t e r f a c e . Experiments i n DLI LC-MS w i t h t o t a l i n t r o d u c t i o n from a narrow-bore LC column and a narrow-bore column have demonstrated the u t i l i t y of u s i n g d i f f e r e n t amounts of c h l o r o a c e t o n i t r i l e i n the LC eluent for the c h a r a c t e r i z a t i o n of chlorophenols, c h l o r i n a t e d phenoxyacids and organophosphorus p e s t i c i d e s (2,17).
ACS Symposium Series; American Chemical Society: Washington, DC, 1990. C. 20036 Chapter 4 Use of Solvent Adduct Ions To Confirm Structure of Selected Herbicides with Thermospray Liquid Chromatography/Mass Spectrometry Damià Barceló Environmental Chemistry Department, CID-CSIC, c/Jordi Girona, 18 08034 Conventional positive-ion and negative-ion modes (PI and NI ,respectively), the use of ammonium acetate and ammonium formate and the addition of 2% chloroacetonitrile in the liquid chromatographic eluent using filament-on thermospray LC-MS have been applied for the determination of selected herbicides.
CAIRNS & SIEGMUND Confirmation of Pesticide Residues 41 CASE HISTORIES Organophosphorus Pesticides (OP). Because of the thermal lability of many pesticides belonging to this general class, analysis by HPLC is the method of choice for primary screening of residues. For confirmation purposes, however, L C / M S techniques often lack sufficient structural evidence to be conclusive. In the case of dimethoate (Fig. 1) the protonated molecule ion at m/z 230 under methane CI conditions is accompanied by two major fragment ions, m/z 88 and 199.
