Membrane inlet ion mobility spectrometry for on-line measurement of ethanol in beer and in yeast fermentation

Kotiaho, Tapio; Lauritsen, Frants Roager; Degn, Hans; Paakkanen, Heikki

doi:10.1016/0003-2670(95)00086-f

Cited by 37 publications

(18 citation statements)

References 18 publications

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“…A number of sensor systems have been developed for different applications including food industry. Studies on the utilization of ion mobility based sensors for food applications is rather limited (Kotiaho et al, 1995;Miettinen et al, 2002a,b;Voysey, 2004;Vestergaard et al, 2007). These limited number of studies with ion mobility based electronic noses were quite promising for food quality control applications.…”

Section: Discussionmentioning

confidence: 97%

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Preliminary study of ion mobility based electronic nose MGD-1 for discrimination of hard cheeses

Gürsoy

Somervuo

Alatossava

2009

Journal of Food Engineering

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Section: Discussionmentioning

confidence: 97%

“…1. Operating principle of MGD-1 is similar to the military model gas sensor M90 described by Kotiaho et al (1995). Briefly, IMCELL TM contains a radioactive source 160 lC of 241 Americium, which is responsible for the ionization of the incoming sample gas molecules in the ionization chamber.…”

Section: Introductionmentioning

confidence: 99%

Preliminary study of ion mobility based electronic nose MGD-1 for discrimination of hard cheeses

Gürsoy

Somervuo

Alatossava

2009

Journal of Food Engineering

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“…9 Only a few investigations have been published providing on-line methods that can be used during fermentation, such as the determination of the growth phase of the yeast population 9 , mass spectrometry with membrane inlet (MIMS) 18 or the determination of ethanol relying on ion mobility spectrometry 10 . Because the ethanol concentration is about 50 times higher than the threshold values for the volatile diketone analytes, relevant for the termination of the fermentation process (µg/L range), the loss of ethanol when using a membrane inlet does not play an important role.…”

Section: Introductionmentioning

confidence: 99%

Beer Fermentation Control Using Ion Mobility Spectrometry - Results of a Pilot Study

Vautz

Baumbach

Jung³

2006

Journal of the Institute of Brewing

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Beer fermentation -a time consuming part of the production process -is typically terminated based on the degradation of diacetyl and 2,3-pentanedione below the odour threshold. Presently no on-line control of both analytes is available. As a consequence, fermentation is often carried out longer than necessary, thus decreasing productivity. In this pilot study, an ion mobility spectrometer using a UV-lamp as an ionisation source and a GC column (30°C constant) for pre-separation were used for the rapid determination of both analytes from the headspace of beer wort, during and after fermentation. Samples were heated to 60°C. Results from such analyses were available after a few minutes without further sample treatment or pre-concentration. Detection limits were below the odour threshold (ng/L range in the gas phase corresponding to the µg/L range in the liquid phase). Results were validated by comparison with the brewery's standard GC-MS method. When applied on-line and in-situ, as a routine test in a brewery, it will help to ensure low levels of diacetyl and 2,3-pentanedione in the product on the one hand and will increase productivity by saving time during fermentation on the other (up to one day in large breweries and even more than one day in smaller ones) by obtaining on-line data of the relevant analytes. After optimisation of the method, further odour or taste relevant analytes could be determined simultaneously.

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“…This paper addresses the development of a multi-membrane inlet front end and an incorporated method of improving analytical signal using near infrared (NIR) laser diodes as a means of increasing sample permeability and desorption from the membrane in a portable system. This usage of a selectively permeable membrane is especially advantageous and has been used in other projects because it allows for an almost immediate analysis with little sample preparation [6][7][8][9]. Owing to the pressure conditions of mass spectrometry being so extreme, it is difficult to design a membrane-preferably planar-that can withstand the difference in pressure.…”

Section: Introductionmentioning

confidence: 99%

Development of Multi-Membrane Near-Infrared Diode Mass Spectrometer for Field Analysis of Aromatic Hydrocarbons

Mach

Wright

Verbeck

2014

J. Am. Soc. Mass Spectrom.

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Abstract. Membrane Inlet Mass Spectrometry (MIMS) is a technique that incorporates a semi-permeable membrane selective for differing organic molecules and chemistries. This eliminates the need for time-consuming sample preparation and facilitates near instantaneous analysis. This study will examine how the front end of MIMS incorporates three dual inlet ports, allowing for differing MIMS materials and selectivity for specific environments. Polydimethylsiloxane (PDMS) membranes have proven to be selective of benzene, toluene, and xylene (BTX) as well as aromatic hydrocarbons that are common in petroleum products while remaining selective against the aliphatic chains. PDMS has proven to be a successful choice of membrane with high permeability in atmospheric environments. In addition, polycyclic aromatic hydrocarbons (PAHs) such as acenaphthene, acenapthylene, naphthalene, and fluorene have recently been detected to the 5 ppb level in a nitrogen atmosphere with our current configuration. This preliminary work provides proof of concept using near-infrared laser diodes that act upon the membrane to increase its permeability and provide higher sensitivity of aromatic samples.

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Membrane inlet ion mobility spectrometry for on-line measurement of ethanol in beer and in yeast fermentation

Cited by 37 publications

References 18 publications

Preliminary study of ion mobility based electronic nose MGD-1 for discrimination of hard cheeses

Preliminary study of ion mobility based electronic nose MGD-1 for discrimination of hard cheeses

Beer Fermentation Control Using Ion Mobility Spectrometry - Results of a Pilot Study

Development of Multi-Membrane Near-Infrared Diode Mass Spectrometer for Field Analysis of Aromatic Hydrocarbons

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