Chemistry of breathalyzer: analysis of ethanol via redox reaction

Lai, Yuen Lu (2007) Chemistry of breathalyzer: analysis of ethanol via redox reaction. Universiti Malaysia Sabah. (Unpublished)

[img]
Preview
Text
ae0000000834.pdf

Download (2MB) | Preview

Abstract

The ethanol content of aqueous solutions and four beverage samples (Anglia Shandy, Jolly Shandy, Anchor beer and Sherry) were determined by back titration method and colorimetric method. Both methods are based on redox reaction between ethanol and acid dichromate. The analytical results showed that the ethanol contents of the aqueous solutions according back titration method was 0.14, 0.22, 0.33, 0.42 and 0.53% v/v, respectively, while for the beverages samples (Anglia Shandy, Jolly Shandy, Anchor beer and Sherry) was 6.6, 6.6, 5.0 and 31.0% v/v, respectively. Meanwhile, according to the colorimetric method, the ethanol content of aqueous solutions was 0.13, 0.22, 0.33, 0.56 and 0.62% v/v, respectively and beverages samples was 6.4, 6.4, 6.5 and 29.0% v/v, respectively. The concentrations obtained for the aqueous solution were relatively close to the actual values. By contrast, the concentrations obtained for the beverage samples were higher compared to the actual values.

Item Type: Academic Exercise
Uncontrolled Keywords: Ethanol, Aqueous solutions, Alcohol beverage, Redox reaction
Subjects: ?? TP500-660 ??
Divisions: SCHOOL > School of Science and Technology
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 02 Jan 2013 01:56
Last Modified: 13 Oct 2017 06:20
URI: http://eprints.ums.edu.my/id/eprint/5624

Actions (login required)

View Item View Item

Browse Repository
Collection
   Articles
   Book
   Speeches
   Thesis
   UMS News
Search
Quick Search

   Latest Repository

Link to other Malaysia University Institutional Repository

Malaysia University Institutional Repository