Back Cover: Simple and rapid analysis of acetaminophen in human autopsy samples by vortex‐assisted dispersive liquid–liquid microextraction‐thin layer chromatography‐image analysis

2021 ◽  
Vol 4 (2) ◽  
Author(s):  
Rajeev Jain ◽  
Aparna Kumari ◽  
Indu Khatri
Keyword(s):  
Image Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Rapid Analysis ◽  
Back Cover ◽  
Dispersive Liquid Liquid Microextraction ◽  
Layer Chromatography ◽  
Liquid Microextraction ◽  
Human Autopsy

A simple, cost-effective and rapid method for simultaneous determination of Strychnos nux-vomica alkaloids in blood and Ayurvedic medicines based on ultrasound-assisted dispersive liquid–liquid microextraction–thin-layer chromatography-image analysis

2020 ◽  
Vol 58 (5) ◽  
pp. 477-484 ◽  
Author(s):  
Rajeev Jain ◽  
Rohitashva Mani Tripathi ◽  
Archna Negi ◽  
Shishir Pratap Singh
Keyword(s):  
Image Analysis ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Simultaneous Determination ◽  
Cost Effective ◽  
Ultrasound Assisted ◽  
Dispersive Liquid Liquid Microextraction ◽  
Layer Chromatography ◽  
Liquid Microextraction

Abstract A simple, rapid, cost-effective and green analytical method is developed based on ultrasound-assisted dispersive liquid–liquid microextraction (US-DLLME) coupled to thin-layer chromatography (TLC)-image analysis for the simultaneous determination of two major alkaloids of Strychnos nux-vomica L i.e., strychnine and brucine. The method is composed of three steps, namely (i) US-DLLME by injecting a mixture of 100-μL chloroform (extraction solvent) and 1-mL methanol (disperser solvent) in 5 mL of aqueous sample, followed by ultrasonication and centrifugation, (ii) TLC of 20 μL of sedimented phase with methanol: ammonia (100:1.5, v/v) as the mobile phase and visualization under ultraviolet radiation (254 nm) and (iii) photography of TLC plate and quantification of spots by image analysis using freely available imageJ software (National Institute of Health, Bethesda, MD, USA). The limit of detection and limit of quantification for both alkaloids were found to be in the range of 0.12–0.15 and 0.36–0.48 μg/spot, respectively. The method was found to be linear in the range of 0.5–5 μg/spot with correlation coefficient (R2) of 0.995 and 0.997 for strychnine and brucine, respectively. The developed method was successfully applied for the determination of strychnine and brucine in Ayurvedic formulations and blood samples. The method does not require any sophisticated instrument and handling skills and can be adopted for rapid analysis of strychnine and brucine in forensic toxicological laboratories.

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