Rapid Screening of Mentha spicata Essential Oil and L-Menthol in Mentha piperita Essential Oil by ATR-FTIR Spectroscopy Coupled with Multivariate Analyses.

Osman Taylan,Osman Sagdic,Nur Cebi

doi:10.3390/foods10020202

Osman Taylan, Osman Sagdic + Show 1 more

Open Access

https://doi.org/10.3390/foods10020202

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Abstract

Mentha piperita essential oil (EO) has high economic importance because of its wide usage area and health-beneficial properties. Besides health-beneficial properties, Mentha piperita EO has great importance in the flavor and food industries because of its unique sensory and quality properties. High-valued essential oils are prone to being adulterated with economic motivations. This kind of adulteration deteriorates the quality of authentic essential oil, injures the consumers, and causes negative effects on the whole supply chain from producer to the consumer. The current research used fast, economic, robust, reliable, and effective ATR-FTIR spectroscopy coupled chemometrics of hierarchical cluster analysis(HCA), principal component analysis (PCA), partial least squares regression (PLSR) and principal component regression (PCR) for monitoring of Mentha spicata EO and L-menthol adulteration in Mentha piperita EOs. Adulterant contents (Mentha spicata and L-menthol) were successfully calculated using PLSR and PCR models. Standard error of the cross-validation SECV values changed between 0.06 and 2.14. Additionally, bias and press values showed alteration between 0.06 and1.43 and 0.03 and 41.15, respectively. Authentic Mentha piperita was successfully distinguished from adulterated samples, Mentha spicata and L-menthol, by HCA and PCA analysis. The results showed that attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy, coupled with chemometrics could be effectively used for monitoring various adulterants in essential oils.

Highlights

Mentha piperita belongs to the Lamiaceae family, is one of the most well-known and most utilized herbs throughout the world [1]
The results showed that attenuated total reflectance-Fourier transform infrared (ATRFTIR) spectroscopy, coupled with chemometrics could be effectively used for monitoring various adulterants in essential oils
Results showed that partial least squares regression (PLSR) and principal component regression (PCR) models had the considerable capability to quantify Mentha spicata and L-menthol in Mentha piperita essential oil with high R2 values and low standard error of cross-validation (SECV) and Bias values

Summary

Introduction

Mentha piperita belongs to the Lamiaceae family, is one of the most well-known and most utilized herbs throughout the world [1]. Mentha piperita is generally defined as peppermint, which is involved in numerous products manufactured in various industries such as flavor, fragrances, cosmetics, aromatherapy, and phytomedicine [2]. Mentha piperita EO has high economic importance because of its wide usage area and health-beneficial properties. Besides health-beneficial properties, Mentha piperita EO has great importance in the flavor and food industries because of its unique sensory and quality properties. Researchers reported that Mentha piperita essential oil is used as a flavor agent in commercial products such as chewing gums, candies, chocolates, drinks, herbal tea preparations, cough drops, the tobacco industry, and more [5]. One can understand that Mentha piperita EO has high economic and industrial importance since it is involved in a wide variety of consumer products throughout the whole world

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