YSI has produced an application note describing the use of its Biochemistry Analyser to measure l-lactate and ethanol in tomato-based products.
L-lactate and ethanol concentrations in complex matrices such as tomato paste and ketchup can be measured in about one minute with minimal preparation using a YSI Biochemistry Analyser.
YSI’s unique enzyme electrode technology provides for specific lactate measurements in the range of 10 to 1335 ppm. Ethanol can be measured in the range of 20 to 1000 ppm.
Experimental results, in collaboration with Heinz North America, have demonstrated that the YSI Biochemistry Analyser can simultaneously measure lactate and ethanol in a tomato matrix with adequate precision and accuracy to make process and quality assurance decisions in tomato product manufacturing.
The results have uses not only for screening potential flavour issues and incipient spoilage in finished product, but also as a means to test microbial load in ingredients or to assess sanitation needs in process equipment.
L-lactate is useful in identifying growth of lactic acid bacteria, while ethanol identifies the potential presence of yeasts and moulds.
A copy of the application note can be found in the PDF link above.
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