Pesticide Residues, Quantitative Determination of Arsenic Residues in Plant Materials

1959 ◽  
Vol 7 (8) ◽  
pp. 553-558 ◽  
Author(s):  
Helmut Frehse ◽  
Helmut Tietz
Keyword(s):  
Quantitative Determination ◽  
Pesticide Residues ◽  
Plant Materials

scholarly journals Quantitative Determination of Pregnanes from Aerial Parts of Caralluma Species Using HPLC-UV and Identification by LC-ESI-TOF

2011 ◽  
Vol 94 (5) ◽  
pp. 1383-1390
Author(s):  
Bharathi Avula ◽  
Yatin J Shukla ◽  
Yan-Hong Wang ◽  
Ikhlas A Khan
Keyword(s):  
Quantitative Determination ◽  
Dietary Supplements ◽  
Hplc Method ◽  
Photodiode Array Detection ◽  
Plant Materials ◽  
Aerial Parts ◽  
Photodiode Array ◽  
Array Detection ◽  
Na Ions

Abstract An HPLC method was developed for the quantitative determination of five pregnane derivatives from aerial parts of Caralluma species and dietary supplements. The method was validated for linearity, repeatability, LOD, and LOQ. The LOD and LOQ of five pregnane compounds were found to be in the range of 1–5 and 3–15 μg/mL, respectively, by HPLC using photodiode array detection. This method was applied to the identification of three plant materials of Caralluma species (C. fimbriata, C. umbellate, and C. attentuata) and seven dietary supplements claiming to contain C. fimbriata. An LC/MS coupled with electrospray ionization interface method was used for the identification of compounds and involved the use of [M+Na]+ ions in the positive ion mode with extracted ion chromatogram.

Formation of Pentafluorobenzyl Derivatives for the Identification and Quantitation of Acid and Phenol Pesticide Residues

1973 ◽  
Vol 56 (6) ◽  
pp. 1503-1505 ◽  
Author(s):  
Lauren G Johnson
Keyword(s):  
Quantitative Determination ◽  
Electron Capture ◽  
Pesticide Residues ◽  
Cleanup Procedure ◽  
Derivatives Of

Abstract A procedure is described for the preparation and electron capture GLC determination of pentafluorobenzyl ester and ether derivatives of 2,4-D, p,p′-DDA, 1-naphthol, p-nitrophenol, and sec.-amyl phenols. A column cleanup procedure quantitatively isolates the derivatives from excess reagents and other interferences. The method can be used as an aid in the confirmation of the identity of pesticide residues and for the quantitative determination of extracted residues.

Testing the Accuracy of Analytical Standard Solutions Used for Quantitative Determination of Pesticide Residues

2017 ◽  
Vol 100 (4) ◽  
pp. 1058-1061 ◽  
Author(s):  
Árpád Ambrus ◽  
Gregory Noonan ◽  
Anikó Németh ◽  
Gabriella Kötelesné-Suszter ◽  
Michelangelo Anastassiades ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Pesticide Residues ◽  
Standard Solutions

Ion-pair assisted liquid–liquid extraction for selective separation and analysis of multiclass pesticide residues in environmental waters

2014 ◽  
Vol 6 (13) ◽  
pp. 4633-4642 ◽  
Author(s):  
Abera Gure ◽  
Negussie Megersa ◽  
Negussie Retta
Keyword(s):  
Quantitative Determination ◽  
Pesticide Residues ◽  
Extraction Method ◽  
Environmental Water ◽  
Liquid Extraction ◽  
Ion Pair ◽  
Environmental Waters ◽  
Extraction Solvent ◽  
Liquid Liquid Extraction

Ion-pair-assisted liquid–liquid extraction method, using acetonitrile as the extraction solvent, for the quantitative determination of ten multiclass pesticides in environmental water.

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