Gas Diffusion-Flow Injection Determination of Free and Total Sulfur Dioxide in Wines by Conductometry

[img]PDF - Authorized users only
Language: English
79Kb
Title:Gas Diffusion-Flow Injection Determination of Free and Total Sulfur Dioxide in Wines by Conductometry
Creators:
Kubáň, Petr
Janoš, Pavel
Kubáň, Vlastimil
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 63, 6, pp. 770-782
Uncontrolled Keywords:Gas diffusion, Sulfur dioxide, Wine, SO<sub>2</sub> Determination, Flow injection analysis

Abstract

Sensitive flow injection analysis methods for the determination of free and total sulfur dioxide in wines are presented. The bound S(IV) was liberated by alkaline hydrolysis with 4 mol/l NaOH. All forms of S(IV) were liberated from the sample zone by sulfuric acid and subsequently transported through a microporous PVDF membrane. The penetrated gases were collected in water for preselected period and determined by conductometry with detection limit 1 mg/l and relative standard deviations 0.8 and 0.6% at 10 and 150 mg/l (<i>n </i>= 10) for free and total S(IV), respectively. The results are comparable with those obtained by standard titrimetric procedures with visual (Czech State Standard) and/or potentiometric indication.

Title:Gas Diffusion-Flow Injection Determination of Free and Total Sulfur Dioxide in Wines by Conductometry
Creators:
Kubáň, Petr
Janoš, Pavel
Kubáň, Vlastimil
Uncontrolled Keywords:Gas diffusion, Sulfur dioxide, Wine, SO<sub>2</sub> Determination, Flow injection analysis
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:63
Number:6
Page Range:pp. 770-782
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc19980770UNSPECIFIED
ID Code:1341
Item Type:Article
Deposited On:06 Feb 2009 17:08
Last Modified:06 Feb 2009 16:08

Citation

Kubáň, Petr; Janoš, Pavel; Kubáň, Vlastimil (1998) Gas Diffusion-Flow Injection Determination of Free and Total Sulfur Dioxide in Wines by Conductometry. Collection of Czechoslovak Chemical Communications, 63 (6). pp. 770-782. ISSN 0010-0765

Repository Staff Only: item control page