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Survey of Brix and TA in kombucha

2/17/2021

 
Download the white paper provided below to see how TA and Brix compare in over 50 different kombucha samples provided by producers at KombuchaKon 2019.

Survey of Brix and TA in Kombucha

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Quality Control Checkpoints for Beer

2/12/2021

 
Download the poster provided below to see common quality control checkpoints in the beer brewing process.
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How to use the VDK+ Test Strips?

2/12/2021

 
Download the white paper below to see how you can use the VDK+ Test Strips to improve your beer quality program!
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Why spend money on VDK+ Test Strips?

2/12/2021

 
Download the whitepaper below to see why VDK+ Test Strips could save you money!
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RedCheck Sour Beer Case Study

2/12/2021

 
Download the RedCheck Sour Beer Case Study to see how Odell Brewing Co. uses the RedCheck TA Test Kit as part of their sour beer program!
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RedCheck Kombucha Case Study

2/12/2021

 
Download the RedCheck Kombucha Case Study below to see how Rowdy Mermaid Kombucha uses the RedCheck TA Test Kit!
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How to perform a titratable acidity measurement using the RedCheck Titratable Acidity Test Kit

2/8/2021

 
Follow this video to learn how to use the RedCheck TA Test Kit!

How to perform a VDK+ Test Strip Reaction (In-depth)

2/2/2021

 
Follow this video to learn how to perform a VDK+ Test Strip reaction.

What are vicinal diketones (VDK's) and why do they matter?

1/26/2021

 
2,3-butanedione (diacetyl) and 2,3-pentanedione, colloquially known as vicinal diketones (VDKs), are metabolic by-products of yeast fermentation that impart buttery flavor characteristics to fermented beverages. Although desired in certain cases, VDKs are frequently denoted as an off-flavor in finished beer, cider, kombucha, and wine when present at concentrations between 100-4000 parts per billion (ppb).

Organoleptic perception of VDKs varies greatly between people. For example, trained sensory experts can detect VDKs down to 40-100 ppb in beer depending on the style, while a substantive fraction of the population cannot discern VDKs present even at levels exceeding 4000 ppb. This range in sensory perception has led to the development of several chemical assays specific for VDKs in beer.

Current methods for monitoring VDKs generally utilize either gas chromatography paired with a specialized detector (e.g. GC-MS or GC-ECD) or distillation of a beer sample followed by colorimetric reaction and detection via spectrophotometry. Methods utilizing gas chromatography require expensive instrumentation, while methods utilizing spectrophotometry are technical and require large amounts of time for a single measurement. Both general workflows require sufficient chemical training. This is why we developed our proprietary VDK+ Test Strips. 


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