Identification of Modified and Unmodified Lipophilic Β-Diketones Using Electrospray Ionisation Mass Spectrum (Esi-Ms)

Volume 2 - Issue 1

Kaana Asemave*

Received: February 15, 2018;   Published: March 01, 2018

DOI: 10.32474/AOICS.2018.02.000127

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Abstract

Identification of modified and unmodified lipophilic β-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.

Keywords: Electrospray ionisation mass spectrum (ESI-MS); Modified and unmodified lipophilic β-diketone

Abstract| Introduction| Materials and Methods| Results and Discussion| Conclusion| Acknowledgements| References|