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1995 Kotiaho Membrane inlet ion mobility spectrometry for on-line measurement of ethanol in beer and in yeast fermentation
Membrane inlet ion mobility spectrometry for online measurement of ethanol in beer and in yeast fermentation
Analytica Chimica Acta 309 (1-3), 317 (1995)
A membrane inlet ion mobility spectrometric method was developed for on-line measurement of ethanol concentration in beer and in yeast fermentation. Main parts of the measurement system are an ion mobility spectrometer, M90, and a custom built membrane inlet. The M90 ion mobility spectrometer is unique in the sense that positive and negative ions are simultaneously measured at 6 different detection channels, 3 for positive ions and 3 for negative ions. The custom built membrane inlet utilized a microporous polypropylene membrane for sample introduction into the M90 instrument. The developed measurement system allowed analysis of ethanol at 0.05% (v/v) levels, clearly sufficient for the applications reported here. Good signal linearity was observed at positive ion channels 1 and 3 in ethanol concentration range 0.2−10% (v/v), calculated correlation coefficients were 0.989 and 0.999, respectively. Agreement between the ethanol concentration measured by membrane inlet ion mobility spectrometry and the values declared on the beer bottle labels was good. Reproducibility of signals of the detection channels which gave the best response for ethanol was excellent in ethanol concentration measurement of beer samples, coefficient of variation was 1% for all these channels. Membrane inlet ion mobility spectrometry was also shown to be capable of on-line ethanol measurement, confirmed by membrane inlet mass spectrometry, during yeast fermentations.
 
Climate troubles brewing for beer makers
Rex Dalton
 
Episode 006 - Brewing an Extract Batch - Part Three
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (24 Apr 2008)
Part four of the step by step home beer brewing series. Brewing has never been easier.
Posted by craigthebrewer (who is an author) to homebrewing Beer brew Home homebrew on Thu Apr 24 2008 at 22:27 UTC | info | related
 
Episode 005 - Brewing an Extract Batch - Part Two
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (24 Apr 2008)
Part two of the step by step home brewing series.
Posted by craigthebrewer (who is an author) to homebrewing Beer brew Home homebrew on Thu Apr 24 2008 at 21:43 UTC | info | related
 
Episode 004 - Brewing an Extract Batch - Part One
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (24 Apr 2008)
Part one of a step by step home beer brewing series.
Posted by craigthebrewer (who is an author) to homebrewing homebrew Beer on Thu Apr 24 2008 at 20:19 UTC | info | related
 
Episode 003 - Basic Ingredient Kit
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (23 Apr 2008)
An overview of the Beer Ingredient Kit offered at Homebrewers.com
Posted by craigthebrewer (who is an author) to ingredients homebrewing brew Home homebrew Beer on Thu Apr 24 2008 at 19:52 UTC | info | related
 
Episode 002 - An Overview of Brewing Equipment - Part Two
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (23 Apr 2008)
An overview of the additional brewing equipment in the Beer Starter Kit offered at Homebrewers.com
Posted by craigthebrewer (who is an author) to equipment homebrewing brew Home homebrew Beer on Thu Apr 24 2008 at 18:46 UTC | info | related
 
Episode 001 - An Overview of Brewing Equipment - Part One
HomebrewingVideo.com - Tutorials and Videos for Homebrewers, (23 Apr 2008)
An overview of the Brewing Starter Kit offered at Homebrewers.com
Posted by craigthebrewer (who is an author) to equipment homebrewing brew Home homebrew Beer on Thu Apr 24 2008 at 00:44 UTC | info | related
 
Fabulously40.com - What Every Office Needs.
fabulously40.com
I would love to go to work if this were the case
Posted by morush to Beer career work on Mon Apr 21 2008 at 03:07 UTC | info | related
 
Neon Sign Collectibles
www.neonsignscollectibles.com
Large store with beer, casino, open, and store neon signs.

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