Perspective - Pharmaceutical Bioprocessing (2022) Volume 10, Issue 3

A Note on Sensing the Water Oil Interface by Infrared-Spectroscopy

Johannes Kiefer*

Technical thermodynamics, University of Bremen, Badgasteiner Str. 1, Bremen 28359, Germany; [email protected]; Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen- Nuremberg, Erlangen 91052, Germany ;School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK


*Corresponding Author:
Johannes Kiefer
Technical thermodynamics, University of Bremen, Badgasteiner Str. 1, Bremen 28359, Germany; [email protected]; Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen- Nuremberg, Erlangen 91052, Germany ;School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK
E-mail: [email protected]


Received: 02-May-2022, Manuscript No. fmpb-22-50102; Editor assigned: 03-May-2022, PreQC No. fmpb-22- 50102(PQ); Reviewed: 16-May-2022, QC No. fmpb-22-50102; Revised: 23-May-2022, Manuscript No. fmpb-22-50102 (R); Published: 30-May-2022 , DOI: 10.37532/2048- 9145.2022.10(3).58-59


In this work, attenuated total reflection (ATR) infrared (IR) spectrometryalysis|spectrum analysis|spectrographic analysis|chemical analysis|qualitative analysis} is applied to a series of w/o emulsions of an liquid anthocyanin-rich bilberry extract spread in an exceedingly
medium chain acylglycerol (MCT) oil section. The content of the surface-active agent polyglycerin-polyricinoleat (PGPR) has been varied consistently so as to research whether or not or not its concentration has a control on the molecular stabilization mechanisms.
The molecular stabilization is accessed by a careful analysis of the IR spectrum, wherever changes within the wave frequencies and signal strengths indicate alterations of the molecular surroundings at the water/oil interface. Such emulsions ar advanced multicomponent
systems and therefore the molecular mechanisms that result in a stable emulsion ar nevertheless to be absolutely understood. The results recommend that adding surface-active agent in more than  Chronicles by weight doesn’t result in Associate in Nursing increased stabilization of the emulsion.


Megascopic section separation • Single-exponential decay • Canal


Emulsions are point in time systems comprising of 2 or a lot of liquids that are unmixable with one another [1]. Typically, the (dispersed section|dispersed particles|phase|form) within the sort of tiny droplets is equally distributed within the continuous phase. To stabilize the emulsion and to avoid megascopic section separation, emulsifiers in terms of active substances (surfactants) ar admixed [2]. These surfactants are commonly soluble, preponderantly in one section, however they exhibit practical teams that may move with the opposite section at the surface boundary. On the one hand, the surface-active agent represents Associate in Nursing additive, that ensures emulsion stability [3].

They have conjointly been with success applied to emulsions .Valero used transmissionmode FTIR chemical analysis to review structural changes of proteins in w/o emulsions. identical technique was utilized Valero to review water structures in AOT/alkane/water micro-emulsions of various composition. an endeavor to tell apart between surface and bulk water IR signals in AOT reverse micelles was created.

In the gift work, we have a tendency to apply the on top of ATR-FTIR technique to review the result of variable the surface-active agent content on the molecular stabilization mechanism. The samples underneath investigation ar of interest within the space of food technology Associate in Nursingd food chemistry: Associate in Nursing emulsion wherever an liquid anthocyanin answer in terms of a bilberry extract is spread in medium chain acylglycerol (MCT) oil stable with polyglycerine-polyricinoleat (PGPR) as surface-active agent.


The water droplets ar then spread in an exceedingly continuous oil section. in an exceedingly additional step, this w/o emulsion is spread in another liquid section. it’s unneeded to mention that the formulation of a stable w/o/w emulsion needs each expertise and an honest understanding of the surface phenomena [4]. Despite the hassle within the production, such multiple emulsions can give edges on the far side the mere protection of bioactive ingredients. as an example, throughout the organic {process|biological process} process, the multiple emulsion structure of many protection layers composed of a acylglycerol section and several other emulsifiers and additional stabilising ingredients will alter a triggered unleash of the encapsulated molecules at completely different locations within the canal. Previous work has shown that oil droplets will sustain abdomen conditions.

The present study focuses on the initial w/o emulsion system, because the interface between the liquid anthocyanin answer and therefore the oil is crucial for the behaviour from a practical food purpose of read. The aim of this work is to research the result of the surface-active agent concentration on the molecular stabilization mechanism. For this purpose, w/o emulsions ar studied and therefore the surface-active agent concentration within the oil section is varied between I Chronicles and 100% by weight, that represents the much relevant vary. It represents a single-exponential decay within the absence of riveting molecules. once a wavelength is taken into account at that important absorption within the oil section takes place, the penetration depth is reduced beginning at the surface. On the opposite hand, once the wavelength of interest is absorbed within the water section solely, the initial intensity decay at the surface remains identical as within the figure, however at the w/o interface the decay constant changes suddenly and therefore the decay is increased within the driblet. As a simplified image, this may be thought-about because the product of 2 exponential functions, one taking under consideration the medium while not absorption and one taking under consideration the absorption effects via the Beer-Lambert law.

This indicates that the fraction of absolutely hydrogen-bonded water molecules will increase within the emulsion [5]. However, it should be unbroken in mind that the frequency of the height is blue-shifted with relevance the solution case. Hence, the information indicate that the network of those absolutely hydrogen-bonded molecules is considerably weaker than in bulk water.



Conflict of interest

No conflict of interest


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