Identification and quantitative determination of carboxylic acids in biological objects by chromatomass spectrometry and gas chromatography

1999 ◽  
Vol 33 (8) ◽  
pp. 444-446
Author(s):  
K. A. Dychko ◽  
G. L. Ryzhova ◽  
T. T. Kuryaeva ◽  
N. L. Kir'yanova ◽  
I. V. Bogdanova
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Carboxylic Acids ◽  
Biological Objects ◽  
Chromatomass Spectrometry

Identification and quantitative determination of fenozan acid in biological objects by chromatomass spectrometry

2000 ◽  
Vol 34 (5) ◽  
pp. 273-275
Author(s):  
A. A. Prokopov ◽  
A. S. Berlyand ◽  
N. V. Veselovskaya ◽  
E. V. Ufimtseva ◽  
M. V. Belova ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
Biological Objects ◽  
Chromatomass Spectrometry

Gas Chromatographic Determination of N-Butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-toluidine and α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine in Formulations

1971 ◽  
Vol 54 (3) ◽  
pp. 711-712
Author(s):  
Martha Fuzesi
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Electron Capture ◽  
Chromatographic Method ◽  
Chromatographic Determination ◽  
Electron Capture Detector ◽  
Reference Solution ◽  
Gas Chromatographic Method

Abstract A gas chromatographic method is described for the quantitative determination of N-butyl-N-ethyl-α,α,α-trifluoro-2,6-dinitro-p-tolindine and α,α,α-trifluoro-2,6-dinitro-N,N-dipropyI-p-toluidine herbicides in formulations. The sample is extracted with benzene, and equal amounts of sample and reference solution in the same concentration range are analyzed by gas chromatography, using an electron capture detector and an SE-30/Diatoport S column. The method has been applied successfully to laboratory-prepared and commercial samples.

Direct quantitative determination of cyanamide by stable isotope dilution gas chromatography–mass spectrometry

2005 ◽  
Vol 1098 (1-2) ◽  
pp. 138-143 ◽  
Author(s):  
Syuntaro Hiradate ◽  
Tsunashi Kamo ◽  
Eri Nakajima ◽  
Kenji Kato ◽  
Yoshiharu Fujii
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Stable Isotope ◽  
Quantitative Determination ◽  
Isotope Dilution ◽  
Gas Chromatography Mass Spectrometry ◽  
Stable Isotope Dilution ◽  
Chromatography Mass Spectrometry

scholarly journals QUANTITATIVE DETERMINATION OF PHENOL CARBOXYLIC ACIDS IN POMEGRANATE FRUIT PULP BY THE HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY WITH ULTRAVIOLET DETECTION

2019 ◽  
Vol 12 (1) ◽  
pp. 548
Author(s):  
Ruben Ashotovich Pogosyan ◽  
Olga Vladimirovna Nesterova ◽  
Dmitry Olegovich Bokov ◽  
Irina Alexandrovna Samylina
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Phenolic Compounds ◽  
Quantitative Determination ◽  
Gallic Acid ◽  
Carboxylic Acids ◽  
High Performance ◽  
Fruit Pulp ◽  
Pomegranate Fruit

Objective: Pomegranate (Punica granatum L.) is a broadly used plant possessing a wide range of medicinal properties. In this research, we have mainly focused on the investigation of phenolic compounds of pomegranate fruit pulp (PFP).Methods: Fresh fruits of “Çəhrayı Gülöyşə,” “Kizil-anor,” and pomegranate varietal mixture were used as samples. High-performance liquid chromatography-ultraviolet (HPLC-UV) analysis of phenol carboxylic acids was performed with metal column Kromasil® C18 (4.6×250 mm, particle size 5 μm) and the acetonitrile-water-concentrated acid phosphoric system (400:600:5) under isocratic elution conditions (flow rate of 0.5 ml/min). Detection was carried out using a UV detector “GILSTON” UV/Visible model 151 at a wavelength of 280 nm.Results and Discussion: As a result of our research, we proposed chromatographic conditions for the separation of phenolic compounds, the conditions for sample preparation of PFP. Procedure for determination of phenolic carboxylic acids total content in terms of gallic acid by HPLC-UV method was developed. According to the obtained data, the content of phenolic carboxylic acids should be at least 0.7%.Conclusion: Procedure for the quantitative determination of gallic acid using the HPLC-UV method was developed. This method which can be used in the standardization of new medicinal plant raw materials - PFP, as well as extract preparations based on it in the future.

Quantitative Determination of Linoleic Acid in Infant Formulas by Gas Chromatography

1987 ◽  
Vol 70 (4) ◽  
pp. 702-705
Author(s):  
Theresa W Lee
Keyword(s):  
Gas Chromatography ◽  
Linoleic Acid ◽  
Methyl Linoleate ◽  
Quantitative Determination ◽  
Methyl Esters ◽  
Infant Formulas ◽  
Methyl Heptadecanoate ◽  
Glass Column ◽  
Peak Areas

Abstract A method has been developed for the quantitative determination of linoleic acid in infant formulas by gas chromatography (GC). A known amount of triheptadecanoin was spiked into the sample. Total lipid was extracted from the product by an ethyl ether-petroleum etherethanol system in a Mojonnier flask. The sample was saponified by methanolic KOH after the solvents were evaporated. Methyl esters of the fatty acids were prepared by boron trifluoride (BF3) in methanol and analyzed by gas chromatography. A glass column packed with 10% SP-2340 (75% cyanopropyl silicone) was used to separate and identify the methyl linoleate and the methyl heptadecanoate. The quantity of methyl linoleate was calculated by comparing the integrated peak areas of these 2 fatty acid methyl esters. This method was satisfactory for both milk protein-based and soy protein-based matrixes. The results obtained by this method are comparable to those obtained by the AOAC spectrophotometric method 28.082- 28.085.

Quantitative determination of the principal and secondary intermediates in the synthesis of cyanoacetic ester by gas chromatography

1975 ◽  
Vol 9 (1) ◽  
pp. 61-67
Author(s):  
T. A. Grushina ◽  
M. V. Balyakina ◽  
V. I. Gunar ◽  
M. Ts. Yanotovskii
Keyword(s):  
Gas Chromatography ◽  
Quantitative Determination ◽  
Cyanoacetic Ester

Flame Response in the Quantitative Determination of High Molecular Weight Paraffins and Alcohols by Gas Chromatography.

1963 ◽  
Vol 35 (3) ◽  
pp. 360-362 ◽  
Author(s):  
Gerald. Perkins ◽  
R. E. Laramy ◽  
L. D. Lively
Keyword(s):  
Molecular Weight ◽  
Gas Chromatography ◽  
Quantitative Determination ◽  
High Molecular Weight ◽  
Flame Response
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