QuantiQuik™ D-Lactic Acid Quick Test Strips

RT

What samples have you tested?
The strips have been tested on red wine, white wine, homogenized whole milk, cultured buttermilk, yogurt, malt mash, beer and lemonade.

My sample turns the strip very dark purple, how can I determine the D-lactate concentration?
Very dark purple indicates that the diluted sample concentration is greater than 180 mg/L. To obtain a more accurate concentration, the sample should be further diluted and retested. For example, if the sample was diluted 5x, try diluting 21x.

I don’t have access to a pipetteman. How can I accurately measure out my samples?
We offer exact volume transfer pipettes as an accessory. For samples requiring a 21x dilution, order the 20 uL transfer pipettes (TP20). For samples requiring a 5x dilution, order the 100 uL transfer pipettes (TP100).

Can I store unused reagents for future use?
Yes, unused reagents can be stored according to the assay protocol. The strips should be kept in a dry, cool location and protected from light.

I am running sour beer samples and know that there should be high levels of lactate in the samples. However, the strips are very patchy and only have color in the corners. What is wrong?
The enzymes in the strips need to be around pH 7 to work properly. Your sour beer may be too acidic, so please adjust the pH with NaOH or another base until it is pH ca.7 and rerun the strips. If the levels are quite high, you may also want to dilute the sample in water which will make the sample closer to pH 7 as well since high levels of lactate "max out" the strip.


For more detailed product information and questions, please feel free to send an inquiry to info@hoelzel.de

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