Extraction, Sample Preparation, and Analytical Methods for Quality Issues of Essential Oils

Spices and herbs are among the most commonly adulterated food types. This is because spices are widely used to process food. Spices not only enhance the flavor and taste of food, but they are also sources of numerous bioactive compounds that are significantly beneficial for health. The healing effects of spices are connected with their antimicrobial, anti-inflammatory and carminative properties. However, regular consumption of adulterated spices may cause fatal damage to our system because adulterants in most cases are unhealthy. For that reason, the appropriate analytical methods are necessary for quality assurance and to ensure the authenticity of spices. Spectroscopic methods are gaining interest as they are fast, require little or no sample preparation, and provide rich structural information. This review provides an overview of the application of NMR spectroscopy combined with chemometric analysis to determine the quality and adulteration of spices.

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Analysis of Synthetic Fibers by Diamond Cell and Sapphire Cell Infrared Spectrophotometry

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/61.3.526 ◽

1978 ◽

Vol 61 (3) ◽

pp. 526-532

Author(s):

Leonard K Read ◽

Robert J Kopec

Keyword(s):

Sample Preparation ◽

Analytical Methods ◽

Nondestructive Method ◽

Spectrophotometric Analysis ◽

Infrared Spectrophotometry ◽

Generic Type ◽

Synthetic Fibers ◽

Fiber Sample

Abstract A rapid, simple, and nondestructive method of sample preparation and analysis is described for the infrared spectrophotometric analysis of synthetic fibers. This method uses a combined diamond cell and sapphire cell technique that yields highly resolved spectra with microgramsize fiber samples. From these highly resolved spectra, the generic type of fiber can be readily determined. Although the fiber sample has been physically crushed, it is not destroyed during the analysis and can be further examined by other analytical methods.

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Synthetic cannabinoids in biological specimens: a review of current analytical methods and sample preparation techniques

Bioanalysis ◽

10.4155/bio-2018-0150 ◽

2018 ◽

Vol 10 (19) ◽

pp. 1609-1623 ◽

Cited By ~ 7

Author(s):

Tiago Rosado ◽

Joana Gonçalves ◽

Ângelo Luís ◽

Sara Malaca ◽

Sofia Soares ◽

...

Keyword(s):

Sample Preparation ◽

Analytical Methods ◽

Synthetic Cannabinoids ◽

Preparation Techniques

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Essential oils in nanostructured systems: Challenges in preparation and analytical methods

Talanta ◽

10.1016/j.talanta.2018.11.029 ◽

2019 ◽

Vol 195 ◽

pp. 204-214 ◽

Cited By ~ 18

Author(s):

Sheila Porto de Matos ◽

Leticia G. Lucca ◽

Letícia S. Koester

Keyword(s):

Essential Oils ◽

Analytical Methods ◽

Nanostructured Systems

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Sample preparation and analytical methods

Basalt Intrusions in Evaporites - Lecture Notes in Earth Sciences ◽

10.1007/bfb0021921 ◽

2005 ◽

pp. 20-28

Keyword(s):

Sample Preparation ◽

Analytical Methods

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Implementing Green Analytical Methodologies Using Solid-Phase Microextraction: A Review

Molecules ◽

10.3390/molecules25225297 ◽

2020 ◽

Vol 25 (22) ◽

pp. 5297

Author(s):

Kayla M. Billiard ◽

Amanda R. Dershem ◽

Emanuela Gionfriddo

Keyword(s):

Analytical Chemistry ◽

Sample Preparation ◽

Analytical Method ◽

Analytical Methods ◽

Solid Phase Microextraction ◽

Method Development ◽

Assessment Tool ◽

Solid Phase ◽

Assessment Tools ◽

Green Analytical Chemistry

Implementing green analytical methodologies has been one of the main objectives of the analytical chemistry community for the past two decades. Sample preparation and extraction procedures are two parts of analytical method development that can be best adapted to meet the principles of green analytical chemistry. The goal of transitioning to green analytical chemistry is to establish new methods that perform comparably—or superiorly—to traditional methods. The use of assessment tools to provide an objective and concise evaluation of the analytical methods’ adherence to the principles of green analytical chemistry is critical to achieving this goal. In this review, we describe various sample preparation and extraction methods that can be used to increase the greenness of a given analytical method. We gave special emphasis to modern microextraction technologies and their important contributions to the development of new green analytical methods. Several manuscripts in which the greenness of a solid-phase microextraction (SPME) technique was compared to other sample preparation strategies using the Green Analytical Procedure Index (GAPI), a green assessment tool, were reviewed.

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