Rapid determination of rhodium and palladium using liquid-liquid extraction with tricaprylmonomethylam-monium chloride and flame photometry

1968 ◽  
Vol 40 (1) ◽  
pp. 6-9 ◽  
Author(s):  
Milton Hugh. Campbell
Keyword(s):  
Rapid Determination ◽  
Liquid Extraction ◽  
Flame Photometry ◽  
Liquid Liquid Extraction ◽  
Monium Chloride

scholarly journals Rapid Determination of Sotolon in Fortified Wines Using a Miniaturized Liquid-Liquid Extraction Followed by LC-MS/MS Analysis

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Vanda Pereira ◽  
João M. Leça ◽  
João M. Gaspar ◽  
Ana C. Pereira ◽  
José C. Marques
Keyword(s):  
Rapid Determination ◽  
High Sensitivity ◽  
Liquid Extraction ◽  
Single Step ◽  
Alcoholic Beverages ◽  
Liquid Liquid Extraction ◽  
Sweet Wines ◽  
Fortified Wines ◽  
Full Factorial

Sotolon (4,5-dimethyl-3-hydroxy-2,5-dihydrofuran-2-one) is a powerful odorant usually pointed out as being responsible not only for the characteristic curry notes of the finest fortified wines but also for the off-flavour notes in prematurely oxidized white wines. Most methods reported in literature for quantifying sotolon in wines are quite laborious and use large volumes of organic solvents. Thus, in the present study, the development of a simple, fast, and environment-friendly method for the quantification of sotolon in fortified wine is herein presented. The proposed method uses a single-step liquid-liquid extraction followed by RP-LC-MS/MS and was optimized using a full factorial design. The method showed good linearity (R2 = 0.9999), intra- and interday precision lower than 10% RSD, recovery of about 95%, and high sensitivity (LOQ of 0.04 μg/L). The method was applied to analyse 44 fortified wines from different styles (from dry to sweet wines) and ages (3–115 years old), and it was found that it covers the concentration range usually found for this compound in this kind of alcoholic beverages, which was found to be within 6.3–810 μg/L. Thus, it can be concluded that this method can be used as an accurate tool for the rapid analysis of sotolon, since the early stages of its formation up to long ageing periods.

Note on a Rapid Determination of Aflatoxins in Peanuts and Peanut Products

1970 ◽  
Vol 53 (5) ◽  
pp. 1064-1066
Author(s):  
D H Liem ◽  
P R Beljaars
Keyword(s):  
Rapid Determination ◽  
Peanut Butter ◽  
Extraction Procedure ◽  
Liquid Extraction ◽  
Direct Extraction ◽  
Roasted Peanut ◽  
Rapid Extraction ◽  
Liquid Liquid Extraction ◽  
Extracting Solvent

Abstract A simple and rapid extraction procedure, based on a direct extraction introduced by Pons and a single liquid-liquid extraction proposed by Waltking, is described for peanuts and peanut products. Methanol is used as the extracting solvent. TLC, using the system described by Engstrom, yielded satisfactory results. The method is suitable for aflatoxin Bi levels of 8 μg/kg (or higher) in peanut butter and roasted peanut products. Aflatoxin B1 levels down to 3 μg/kg can be detected in raw peanuts and peanut shavings.

scholarly journals A Microfluidic Platform for the Rapid Determination of Distribution Coefficients by Gravity-Assisted Droplet-Based Liquid–Liquid Extraction

2015 ◽  
Vol 87 (12) ◽  
pp. 6265-6270 ◽  
Author(s):  
Carl Esben Poulsen ◽  
Robert C. R. Wootton ◽  
Anders Wolff ◽  
Andrew J. deMello ◽  
Katherine S. Elvira
Keyword(s):  
Rapid Determination ◽  
Distribution Coefficients ◽  
Liquid Extraction ◽  
Microfluidic Platform ◽  
Liquid Liquid Extraction
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