Identification of Modified and Unmodified Lipophilic B-Diketones Using Electrospray Ionisation Mass Spectrum (Esi-Ms)
Journal Title: Archives of Organic and Inorganic Chemical Sciences - Year 2018, Vol 2, Issue 1
Abstract
Identification of modified and unmodified lipophilic p-dketone was carried out successfully using positive ion mode of ESI-MS. The ESI-MS spectra were obtained using LC - Agilent 1260 Infinity with MS - Bruker micro OF time of flight MS in mass range of m/z 200-900, capillary voltage 4500V, nebuliser pressure 21.8 psi, dry gas flow 8L/min and dry gas temp 433K. Potassium adduct ion 503.4437m/z was found for the 14,16-Hentriacontanedione (Htd); whereas, the itaconate modified Htd (Ita) gave a confirmatory sodium species 645.5051m/z. The ion 589.4794 m/z was for potassium species of the singly added acrylate modified Htd (Mas). Meanwhile, the doubly added acrylate modified Htd (Mad) formed the potassium adduct ion of 675.5179m/z. However, protonated species for these molecules were not obtained. Electrospray ionization mass spectroscopic technique (ESI- MS) has already been established as a powerful tool in the characterization of small and large molecules [1]. ESI concept was firstly introduced in 1968 by Dole [2]. It is a less energetic ionization technique, where a sample is protonated in gas phase to form cationic species; not radical (as is the case of impact ionization approach), [3] thus causing little or no fragmentation of the parent compound. It is pertinent to make do with ESI-MS because, in some cases, the column in GC is not suitable for detecting very high molecular weight organic compounds. Literature report has it that, ESI-MS method is reliable, robust and much less time consuming than the GC methods [4]. Importantly, ESI-MS is simple, fast, accurate, sensitive and straightforward technique for the analyzing compounds [5,6]. Alternative techniques for analyses of compounds such as NMR need further processing and requisite expertise to enable the identification of a compound.
Authors and Affiliations
Kaana Asemave
Keywords
Related Articles
- EP ID EP602947
- DOI 10.32474/AOICS.2018.02.000127
- Views 94
- Downloads 0
Heavy Metals Removal from Wastewater by Adsorption on Modified Physically Activated Sewage Sludge
Low cost adsorbent (activated carbon) with a high metal adsorption capacity was prepared from the disposal sewage sludge by physical activation method (Pyrolysis temperatures at 500 °C, 650 °C, 700 °C, 800 °C and 900 °C)...
Phytochemical, Antimicrobial Potential and Antifungal Activities Stem Bark Extract of Boswellia Ovalifoliolata
This study was carried out with an objective to investigate the antibacterial and antifungal potentials of Stem bark of Boswellia ovalifoliolata (BO). The aim of the study is to assess the antimicrobial activity and to d...
Dependence of Cadmium Sulfide Fluorescence on the Excitation Light Energy
Monotonic dependence ofthe fluorescence band position on the exciting light energy has been shown in polycrystalline hexagonal cadmium sulfide at 293 K. The observed phenomenon is interpreted on the basis of a qualitativ...
The Creation of C13H20BeLi2SeSi. The Proposal of a Bio- Inorganic Molecule, Using Ab Initio Methods for The Genesis of a Nano Membrane
The work is an evolution of research already begin and in development. Therefore, we can observe a part that has already been commented that presents the whole development of the research from its beginning. Preliminary...
Heterobimetallic Aryloxides of Titanatranes with Aluminum Alkyls for Ring opening polymerization (ROP) of rac-Lactide
Olefin polymerization catalysis [1a-1b] continues to be an area of considerable importance to both the academic and industrial communities, and a wide range of reports are appearing on the efficient...