Sample preparation and analytical methods

2005 ◽  
pp. 20-28
Keyword(s):  
Sample Preparation ◽  
Analytical Methods

scholarly journals The Application of NMR Spectroscopy and Chemometrics in Authentication of Spices

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 382
Author(s):  
Barbara Pacholczyk-Sienicka ◽  
Grzegorz Ciepielowski ◽  
Łukasz Albrecht
Keyword(s):  
Quality Assurance ◽  
Nmr Spectroscopy ◽  
Sample Preparation ◽  
Bioactive Compounds ◽  
Analytical Methods ◽  
Structural Information ◽  
Chemometric Analysis ◽  
Spectroscopic Methods ◽  
Regular Consumption ◽  
No Sample Preparation

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.

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

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.

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

Bioanalysis ◽  
2018 ◽  
Vol 10 (19) ◽  
pp. 1609-1623 ◽  
Author(s):  
Tiago Rosado ◽  
Joana Gonçalves ◽  
Ângelo Luís ◽  
Sara Malaca ◽  
Sofia Soares ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Analytical Methods ◽  
Synthetic Cannabinoids ◽  
Preparation Techniques

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

Molecules ◽  
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.

Sample preparation approaches for qualitative and quantitative analysis of lipid-derived electrophile modified proteomes by mass spectrometry

2020 ◽  
Vol 16 (6) ◽  
pp. 511-520
Author(s):  
Wenjuan Yuan ◽  
Jun Wang ◽  
Ying Zhang ◽  
Haojie Lu
Keyword(s):  
Mass Spectrometry ◽  
Quantitative Analysis ◽  
Sample Preparation ◽  
Analytical Methods ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative

MS-based analytical methods of lipid-derived electrophile modified proteome are discussed in this review.

scholarly journals Supplemental Material: Tectonic evolution of the central California margin as reflected by detrital zircon composition in the Mount Diablo region

2021 ◽  
Author(s):  
Jared T. Gooley ◽  
et al.
Keyword(s):  
Sample Preparation ◽  
Detrital Zircon ◽  
Analytical Methods ◽  
Tectonic Evolution ◽  
Data Sources ◽  
Central California ◽  
Data Table ◽  
Geologic Map ◽  
Map Data

Appendix S1: Geologic map data sources; Appendix S2: Sample preparation and analytical methods; Table S1: U-Th-Pb data; Table S2: U-Pb age components.

scholarly journals DEVELOPMENT AND VALIDATION OF METHAMPHETAMINE ANALYSIS IN SALIVA USING GAS CHROMATOGRAPHY-TANDEM MASS SPECTROMETRY

2018 ◽  
Vol 10 (1) ◽  
pp. 97
Author(s):  
Yahdiana Harahap ◽  
Muhammad Rezqi Hakim ◽  
Kuswardani Soedigdo
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Sample Preparation ◽  
Analytical Methods ◽  
Mobile Phase ◽  
Tandem Mass ◽  
Chromatography Tandem Mass Spectrometry ◽  
Validation Criteria ◽  
Inner Diameter ◽  
Development And Validation

Objective: The aim of this study was to develop and validate analytical methods for determining methamphetamine in saliva using gas chromatographytandemmass spectrometry (MS).Methods: The chromatography conditions were DB MS-5 capillary columns with a length of 30 m, inner diameter of 0.25 mm, mobile phase of Heliumgas 99.999%, flow rate of 0.8 mL/min, detection of MS at m/z values of 58.00 and 91.00, respectively, and ephedrine HCl as the internal standard.Results: The validation of analytical methods for methamphetamine satisfies the validation criteria by the EMEA Guidelines 2011. Bioanalyticalmethods obtained were linear in the concentration range from 15.0 to 300.0 ng/mL with r>0.9999. Sample preparation was done using liquid–liquidmicroextraction with cyclohexane, supernatant residue was dried and reconstituted with approximately 100 μL of methanol.Conclusion: The method was successfully applied to saliva samples of methamphetamine users with levels in the range of test.

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