August 2021

home / journals / lcgc-north-america / lcgc-north-america-08-01-2021
Headspace Solid-Phase Microextraction Coupled with Gas Chromatography–Mass Spectrometry (HS-SPME-GC–MS) for the Characterization of Cigar Leaves

Headspace Solid-Phase Microextraction Coupled with Gas Chromatography–Mass Spectrometry (HS-SPME-GC–MS) for the Characterization of Cigar Leaves

Hongfei Zhang;Juan Yang;Fengpeng Zhu;Cheng Luo;Yongqiang Pang;Beibei Zhu;Yanbo Luo;Xiangyu Li;Xingyi Jiang;Dongliang Li
August 1st 2021
ArticlePeer Reviewed Articles

HS-SPME-GC–MS was combined with OPLS-DA data analysis to tentatively identify eight chemical markers to differentiate the geographical origins of cigar leaf samples.

Development and Validation of Novel Gas Chromatography (GC) and Thin Layer Chromatography (TLC) Densitometry Methods for the Quantification of Stigmasterol 3-O-β-D-Glucopyranoside (S3G) in Balanites Aegyptiaca Extract: Application to Newly Formulated Balanites Capsules

Development and Validation of Novel Gas Chromatography (GC) and Thin Layer Chromatography (TLC) Densitometry Methods for the Quantification of Stigmasterol 3-O-β-D-Glucopyranoside (S3G) in Balanites Aegyptiaca Extract: Application to Newly Formulated Balanites Capsules

Sara A.A. Elbahrawy;Amira Abdel Motaal;Ola M. Abdallah
August 1st 2021
ArticlePeer-Reviewed Articles

GC and TLC methods are demonstrated for quantification of stigmasterol 3-O-β-D-glucopyranoside (S3G), the main active component in the herbal nutraceutical Balanites aegyptiaca, an antihyperglycemic in Egyptian folk medicine.

Bioanalytical Analysis of Small-Molecule Drugs and Metabolites in Physiological Samples by LC–MS, Part 2: Sample Preparation

Bioanalytical Analysis of Small-Molecule Drugs and Metabolites in Physiological Samples by LC–MS, Part 2: Sample Preparation

Stephanie J. Marin;Jeremy Smith;Jillian Neifeld;Elena Gairloch
August 1st 2021
ArticleColumns

This concise yet comprehensive overview of sample preparation for bioanalysis looks at sample preparation fundamentals, best practices, and modern trends—all illustrated with a case study.

oil rigs

The Analytical Arsenal for Point Source Attribution

a;Kevin A. Schug
August 1st 2021
ArticleColumns

How can we monitor the source and environmental impact of neglected oil and gas acquisition sites, and assess their impact over time?

a silver wrench turns a bolt clockwise

Capillary Gas Chromatography (GC): Getting the Best Separation Without Turning (Too Many) Wrenches

Nicholas H. Snow
August 1st 2021
ArticleColumns

How far can you get on optimizing a GC separation without changing the column? Pretty far, in fact.

Silver gears

But My Peaks Are Not Gaussian! Part I: Basic Concepts in Peak Shape, and the Effect of Extracolumn Connections

Dwight R. Stoll
August 1st 2021
ArticleColumns

In this first installment in a series on the causes of peak asymmetry, we discuss basic concepts in peak shape, explore poor fluidic connections as a common cause of peak tailing, and explain what to do about it.