Characterization of naphthenic acids using mass spectroscopy and chromatographic techniques: study of technical mixtures

2014 ◽  
Vol 6 (3) ◽  
pp. 807-816 ◽  
Author(s):  
Flaviana C. Damasceno ◽  
Liliane D. A. Gruber ◽  
Ana M. Geller ◽  
Maria Cecília Vaz de Campos ◽  
Alexandre O. Gomes ◽  
...  
Keyword(s):  
Mass Spectroscopy ◽  
Naphthenic Acids ◽  
Chromatographic Techniques

Extraction, isolation and characterization of Bauhinia variegata flower

2020 ◽  
pp. 9-12
Author(s):  
Akanksha Gupta ◽  
Abhishek K Tripathi ◽  
Pushpraj S Gupta
Keyword(s):  
Biological Activities ◽  
Molecular Formula ◽  
Native Plant ◽  
Compound A ◽  
Active Constituents ◽  
Chromatographic Techniques ◽  
Isolation And Characterization ◽  
Soxhlet Apparatus ◽  
Bauhinia Variegata

Background: Bauhinia variegata Linn. is a native plant of Asia and China. B. variegata is found in tropical regions of the world. It belongs to family Leguminosae. It is used for diarrhea, hemorrhoids, constipation, piles, edema, leprosy, wounds, tumors, etc.  Objective: The objective of the present study was to perform extraction of B. variegata flower and isolation of active constituents from the extract. Materials and Methods: The ethanolic extraction of B. variegata flower was performed using the Soxhlet apparatus. The isolation of active constituents from the extract was performed using chromatographic techniques. In column chromatographic studies, n-hexane- [dichloromethane (DCM)] (2:8) was used as an eluting system and further purified through thin layer chromatography (TLC). Compound A and B were isolated through chromatographic techniques, then the molecular formula and characterization of these compounds were carried out with mass and infrared (IR) spectral analysis. Results and Discussion: The percentage yield of B. variegata ethanolic extract (BVE) was found to be 20.8% w/w. The different fractions were F1 having 12.5 grams with n-hexane, F2 (17.1 grams) with CH2Cl2, F3 (21.2 grams) with EtOAc, and F4 (13.4 grams) with EtOH. Compound A and B were isolated from the solvent fractions of n-hexane-DCM (2:8) and EtOAc-DCM (1:9), respectively. The compound A was characterized as 3-hydroxy-6-methoxy-2-phenyl-4H-chromen-4-one. The compound B was characterized as 3-hydroxy-6-methyl-2-phenyl-4H-chromen-4-one. Conclusion: Thus, B. variegata flowers possess active components that need to identify their biological activities.

Mass spectrometric characterization of naphthenic acids in environmental samples: A review

2008 ◽  
Vol 28 (1) ◽  
pp. 121-134 ◽  
Author(s):  
John V. Headley ◽  
Kerry M. Peru ◽  
Mark P. Barrow
Keyword(s):  
Environmental Samples ◽  
Naphthenic Acids ◽  
Mass Spectrometric

The Preparation and Characterization of Substituted Pentaphenylcyclopentadienyl Ligands, Their Precursors, and Complexes of Iron

1990 ◽  
Vol 43 (2) ◽  
pp. 281 ◽  
Author(s):  
LD Field ◽  
KM Ho ◽  
CM Lindall ◽  
AF Masters ◽  
AG Webb
Keyword(s):  
Mass Spectroscopy ◽  
Synthesis And Characterization

The synthesis and characterization by infrared, 1H and 13C n.m.r . and mass spectroscopy of the compounds C5Ph4(p-C6H4R)X (R = H, Me, Et, But; X = OH, Br, H), C5Ph4-n(p-C6H4Me)nO (n = 1, 2, 4), C5Ph5-n(p-C6H4Me)nX (n = 2, 3; X = OH, Br) and C5Ph4(p-C6H4R)Fe(CO)2Br (R = H, Me, Et, But) are described.

Characterization of Multiblock Copolymers by Chromatographic Techniques

2011 ◽  
Vol 34 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Patrick Yoba N'Goma ◽  
Wolfgang Radke ◽  
Frank Malz ◽  
Hans Jörg Ziegler ◽  
Michael Zierke ◽  
...  
Keyword(s):  
Multiblock Copolymers ◽  
Chromatographic Techniques

Darstellung und Charakterisierung von 1.4- und 1.5-Dienkomplexen des Platins- Röntgenstrukturanalyse von Dichloro-2.5-diphenyl-1.5-hexadienplatin(II), Cl2Pt((C6H5)2C6H8) / Preparation and Characterization of 1,4- and 1,5-Diene Complexes of Platinum; X-ray Analysis of Dichloro-2,5-diphenyl-1,5-hexadiene Platinum(II), ((Cl2Pt(C6H5)2C6H8)

1980 ◽  
Vol 35 (7) ◽  
pp. 802-807 ◽  
Author(s):  
Michael Kopp ◽  
Luise R. Krauth ◽  
Richard Ratka ◽  
Klaus Weidenhammer ◽  
Manfred L. Ziegler
Keyword(s):  
Mass Spectroscopy ◽  
Elemental Analysis ◽  
X Ray ◽  
H Nmr ◽  
Ray Methods

The reaction of cis-(C6H5CN)2PtCl2 and Na2PtCl4 with the dienes 1,4-pentadiene and 2,5-diphenyl-1,5-hexadiene yields the species cis-(1,4-pentadiene) PtCl2 and cis-(2,5-diphenyl-1,5-hexadiene)PtCl2, respectively. The compounds have been fully characterized by elemental analysis, IR, 1H-NMR, mass spectroscopy and by X-ray methods

scholarly journals Characterization of oil sands naphthenic acids by negative-ion electrospray ionization mass spectrometry: Influence of acidic versus basic transfer solvent

Chemosphere ◽  
2019 ◽  
Vol 222 ◽  
pp. 1017-1024 ◽  
Author(s):  
Kerry M. Peru ◽  
Mary J. Thomas ◽  
Diana Catalina Palacio Lozano ◽  
Dena W. McMartin ◽  
John V. Headley ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Electrospray Ionization ◽  
Electrospray Ionization Mass Spectrometry ◽  
Oil Sands ◽  
Naphthenic Acids ◽  
Negative Ion ◽  
Ionization Mass Spectrometry ◽  
Ionization Mass
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