Navigation Links
Using THERMAL DESORPTION GAS CHROMATOGRAPHY for the identification of fragrance and other components in cosmetic products

Introduction

Cosmetic products such as soap, shampoo, lotions and creams are often scented with suitable compounds to improve their appeal. This application note describes an analytical method to identify the fragrance and other compounds contained within these cosmetic formulations.

Because of the solid or viscous nature of these formulations, direct sample injection into a gas chromatograph is not feasible and some form of analyte extraction is normally required. The approach taken in this work was to place a small amount of the sample in a thermal desorption tube and use an inert carrier gas to purge the volatile sample constituents into a cooled secondary trap. The secondary trap was then rapidly heated to desorb the collected components into a gas chromatographic column for separation and subsequent detection and identification by mass spectrometry.

This thermal desorption gas chromatography mass spectrometry (TD-GC-MS) technique may be fully automated using standard instrumentation and so provides a convenient and easy way of screening difficult sample matrices such as cosmetic products for constituent volatile compounds.

Sample Preparation

Approximately 120 mg of sample was placed within a glass wool plug in a PTFE thermal desorption tube insert as shown in Figure 1a. The flexible tube was squeezed to disperse liquid samples into the glass wool and so ensure an open pathway for carrier gas to flow through it.

The PTFE insert was then placed in an empty stainless steel desorption tube, as shown in Figure 1b, ready for analysis.

The following samples were examined:

  • Liquid soap
  • Body cream
  • Massage lotion
  • Face cream
  • Bathroom soap bar
  • Shampoo
  • Body lotion

Analytical conditions

Each sample tube was analyzed using TD-GC-MS under the conditions listed in Table 1.

Results and Discussion

Figure 2 shows a total ion chromatogram (TIC) obtained from the liquid soap sample. Despite the messy nature of this sample, clean chromatography has been obtained thus enabling easy data processing. The TurboMass software was used to examine the mass spectral data of each of the major components and to perform a library search to identify each of these. Figures 3, 5 and 7 show some typical mass spectra taken from the liquid soap chromatogram and Figures 4, 6 and 8 show the corresponding results from the spectral library search. Figures 9 to 15 show the total ion chromatograms, with annotated peak identities, for the remaining samples.

Conclusions

This note has described a simple means of identifying fragrance and other volatile compounds in cosmetic preparations without the need for tedious and lengthy sample extractions.


'"/>

Source:


Page: All 1 2

Related biology technology :

1. Low Abundance cDNA Cloned Using Stratagenes Human Universal cDNA Library
2. Oil-Free PCR Using the Hot Top Assembly
3. Functional Cloning Using ViraPort Retroviral cDNA Expression Libraries
4. Signal Transduction Reporting Systems Using Cis-Acting Enhancer Elements
5. Using XL1-Red Mutator Strain to Generate Esterase Variants
6. Detect Released Oligosaccharides Using the Eagle Eye II Still Video Imaging System
7. Comparison of Growth Techniques and Media for the Purpose of Plasmid Isolation from E. coli Using the Eppendorf Perfectprep Plasmid Mini Kit
8. Genomic DNA Extraction from Buccal Swabs Using the Perfect gDNA Blood Mini Kit
9. Genomic DNA Extraction from Buffy Coat Using the Perfect gDNA Blood Mini Kit
10. Isolation of Genomic DNA from Saliva Using the Perfect gDNA Blood Mini Kit
11. Protocol for RNA Isolation Using TRIzol Reagent with Phase Lock Gel-Heavy
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/23/2017)... ... June 23, 2017 , ... ... aircraft flying hobbyists, and the University Aviation Association (UAA), the unifying voice for ... UAS4STEM Collegiate Challenge will encourage teamwork, competition, and success through a STEM-based education ...
(Date:6/22/2017)... ... 2017 , ... AESKU.GROUP, an innovation leader in autoimmune ... GmbH, thereby expanding its product portfolio to include allergy and food intolerance diagnostics. ... eczema or a food allergy. Allergies are escalating to epidemic proportions and becoming ...
(Date:6/22/2017)... Yorba Linda, Ca (PRWEB) , ... June 22, 2017 , ... ... labs worldwide. It took 20 years until the first data on cross-contamination of human ... cell lines has been an increasing issue in cell culture labs and is associated ...
(Date:6/20/2017)... Florida (PRWEB) , ... June 20, 2017 , ... Biologist ... in men. While researching her latest book, Men Chase, Women Choose: The Neuroscience of ... that love has a physiological effect on men. ”The logical next step, in my ...
Breaking Biology Technology:
(Date:4/13/2017)... MONICA, Calif. , April 13, 2017 ... New York will feature emerging and evolving ... Summits. Both Innovation Summits will run alongside the expo ... of speaker sessions, panels and demonstrations focused on trending ... coast,s largest advanced design and manufacturing event will take ...
(Date:4/11/2017)... GARDENS, Fla. , April 11, 2017 /PRNewswire/ ... management and secure authentication solutions, today announced that ... by Intelligence Advanced Research Projects Activity (IARPA) to ... IARPA,s Thor program. "Innovation has been ... and IARPA,s Thor program will allow us to ...
(Date:4/11/2017)... , April 11, 2017 No two ... researchers at the New York University Tandon School ... Engineering have found that partial similarities between prints ... used in mobile phones and other electronic devices ... The vulnerability lies in the fact that ...
Breaking Biology News(10 mins):