Chemometric Analysis of Low-field 1 H NMR Spectra for Unveiling Adulteration of Slimming Dietary Supplements by Pharmaceutical Compounds

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
Nao WuVéronique Gilard

Abstract

The recent introduction of compact or low-field (LF) NMR spectrometers that use permanent magnets, giving rise to proton (1H) NMR frequencies between 40 and 80 MHz, have opened up new areas of application. The two main limitations of the technique are its insensitivity and poor spectral resolution. However, this study demonstrates that the chemometric treatment of LF 1H NMR spectral data is suitable for unveiling medicines as adulterants of slimming dietary supplements (DS). To this aim, 66 DS were analyzed with LF 1H NMR after quick and easy sample preparation. A first PLS-DA model built with the LF 1H NMR spectra from forty DS belonging to two classes of weight-loss DS (non-adulterated, and sibutramine or phenolphthalein-adulterated) led to the classification of 13 newly purchased test samples as natural, adulterated or borderline. This classification was further refined when the model was made from the same 40 DS now considered as representing three classes of DS (non-adulterated, sibutramine-adulterated, and phenolphthalein-adulterated). The adulterant (sibutramine or phenolphthalein) was correctly predicted as confirmed by the examination of the 1H NMR spectra. A limitation of the chemometric approach is discussed with the...Continue Reading

References

Dec 14, 2011·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·H RebiereA Nicolas
Feb 7, 2014·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Hyung Joo KimWoo Seong Kim
May 23, 2014·Trends in Analytical Chemistry : TRAC·T ParkerE Kate Kemsley
Sep 1, 2014·Journal of Pharmaceutical and Biomedical Analysis·E DeconinckJ O De Beer
Mar 2, 2016·Journal of Pharmaceutical and Biomedical Analysis·Rabab HachemMyriam Malet-Martino
Apr 15, 2016·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Maxleene SandasiAlvaro Viljoen
Jun 25, 2016·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Krystyna Skalicka-WoźniakIlkay Erdogan Orhan
Dec 13, 2017·Angewandte Chemie·Bernhard Blümich, Kawarpal Singh
Aug 15, 2018·Journal of Pharmaceutical and Biomedical Analysis·Gaëtan AssematMyriam Malet-Martino
Oct 20, 2018·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Tjaša Ekar, Samo Kreft
Jan 27, 2019·Talanta·Gaëtan AssematMyriam Malet-Martino
Jul 18, 2019·Journal of Magnetic Resonance·Bernhard Blümich
Nov 2, 2019·Journal of Pharmaceutical and Biomedical Analysis·Peter H J KeizersAmy van Beers
Jan 29, 2020·Phytochemical Analysis : PCA·Teris André van Beek

❮ Previous
Next ❯

Citations

Aug 9, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Constantinos K Zacharis, Catherine K Markopoulou
Jul 22, 2021·Magnetic Resonance in Chemistry : MRC·Sarah L Draper, Evan R McCarney

❮ Previous
Next ❯

Methods Mentioned

BETA
ion exchange chromatography
NMR

Software Mentioned

P +
MNova
SpinFlow
SIMCA
Matlab
DA
PLS

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.