Simultaneous Determination of Volatile Acids and Sulfur Dioxide in Alcoholic Beverages by Microdiffusion

1967 ◽  
Vol 50 (2) ◽  
pp. 307-311
Author(s):  
Joseph L Owades ◽  
Joseph M Dono
Keyword(s):  
Sulfur Dioxide ◽  
Simultaneous Determination ◽  
Excellent Agreement ◽  
Alcoholic Beverages ◽  
Small Samples ◽  
Volatile Acid ◽  
Diffusion Cell ◽  
Aoac Method ◽  
A New Technique

Abstract A new technique has been developed for determining both volatile acid and sulfur dioxide in beer, wines, and distilled liquors. The new method avoids the troublesome distillation common to other methods by use of microdiffusion in an especially modified diffusion cell. Small samples are reqviired and many replicates can be performed in one day. Results were in excellent agreement with the AOAC method for wine, and precision was very good

Simultaneous Determination of FUC and PGM1 by Isoelectric Focusing

1989 ◽  
Vol 29 (4) ◽  
pp. 311-314 ◽  
Author(s):  
A. Kido ◽  
N. Komatsu ◽  
M. Oya ◽  
S. Sekiyama
Keyword(s):  
Simultaneous Determination ◽  
Isoelectric Focusing ◽  
Simple Procedure ◽  
Simultaneous Detection ◽  
Small Samples ◽  
Hair Roots ◽  
Seminal Stains

This paper describes a simple procedure for the simultaneous detection of FUC and PGM1 in semen, seminal stains, dental pulps and hair roots after separation by isoelectric focusing using Ampholine pH 5–7. The gel plate was first stained for FUC using an agarose overlay with a buffer of pH 7.5. After reading the FUC types, the FUC overlay was removed and replaced with an agarose overlay for PGM. The results show that the method is useful in medicolegal individualization of seminal stains and teeth when only small samples have to be examined.

Rapid Method for the Determination of Proof of Alcoholic Products Containing Dissolved Solids

1972 ◽  
Vol 55 (1) ◽  
pp. 13-14 ◽  
Author(s):  
Duane H Strunk
Keyword(s):  
Rapid Method ◽  
Accurate Method ◽  
Alcohol Concentration ◽  
Analysis Time ◽  
Alcoholic Beverages ◽  
Maximum Difference ◽  
Dissolved Solids ◽  
Aoac Method ◽  
Good Agreement

Abstract A rapid and accurate method is described for determining proof of alcoholic products containing dissolved solids. Samples are distilled in a Jaulmes distillation unit and alcohol concentration is determined by a proof hydrometer. Shortened analysis time is due to the rapid distillation rate afforded by the Jaulmes unit. Recovery data and comparisons with results by a modified AOAC method are presented for 18 commercial alcoholic beverages. Results obtained, using the 2 methods, were in good agreement; a maximum difference in results of 0.4° proof was found for 2 of the 18 samples tested.

Conductometric Determination of Sulfur Dioxide in Wine Using a Multipumping System Coupled to a Gas-Diffusion cell

2018 ◽  
Vol 52 (9) ◽  
pp. 1363-1378 ◽  
Author(s):  
Kaewta Danchana ◽  
Sabrina Clavijo ◽  
Víctor Cerdà
Keyword(s):  
Sulfur Dioxide ◽  
Gas Diffusion ◽  
Diffusion Cell
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