QuantiQuik™ L-Lactic Acid Quick Test Strips
Protocol SDS Available on Amazon Right now on eBay BioAssay Systems is going green. Printed protocols and MSDSs will no longer be included with kits. Starting January 1, 2018, protocols and MSDSs will only be available online here.

Application
Direct determination of L-lactic acid concentrations in food and beverage samples as well as biological samples.

Key Features
Fast and sensitive. Use of 20 or 100 µL sample. Semi-quantitative measurement between 0-360 mg/L (undiluted) L-lactic acid.

Convenient. No expensive lab equipment needed.

Sample treatment and assay can be performed in under 15 minutes.

Method
Visual

Samples
Wine, beer, milk, etc

Species
All

Procedure
Approximately 15 min

Size
10 tests

Shelf Life
6 months

More Details
L-LACTIC ACID, or L-lactate, is generated by lactate dehydrogenase (LDH) under hypoxic or anaerobic conditions. L-lactic acid is added to many foods and beverages to give it a tart flavor. Increased levels of L-lactic acid in milk, egg, and fruit juices can be an indication of spoilage. In the wine industry, increasing levels of L-lactic acid and the decreasing levels of L-malic acid are monitored (Malolactic fermentation). In this process, the overall acidity of the wine is reduced and can lead to the improvement of the flavor of the wine.

BioAssay Systems QuantiQuik™ L-Lactic Acid Test Strips are based on L-lactate dehydrogenase catalyzed oxidation of L-lactate in which the formed NADH reduces a chromogenic reagent. The intensity of product color is directly proportional to L-lactate concentration in the sample.

1. What samples have you tested?



The strips have been tested on red wine, white wine, homogenized whole milk, cultured buttermilk, almond milk, yogurt, beer, champagne, apple juice, lemonade, grape juice, orange juice, cranberry juice, lime and lemon juice.

2. My sample turns the strip very dark purple, how can I determine the L-lactate concentration?



Very dark purple indicates that the diluted sample concentration is greater than 360 mg/L. To obtain a more accurate concentration, the sample should be further diluted and retested. For example, if the sample was diluted 5×, try diluting 21×.

3. 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 21× dilution, order the 20 µL transfer pipettes (TP20). For samples requiring a 5× dilution, order the 100 µL transfer pipettes (TP100).

4. 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.

For more detailed product information and questions, please feel free to Contact Us. Or for more general information regarding our assays, please refer to our General Questions
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Please inquire or request assay service or call 1-510-782-9988 x 2.
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QuantiQuik™ L-Lactic Acid Quick Test Strips
Catalog No: QQLLAC10
Price: $49    Qty:
For orders of 10 or more kits, please call 1-510-7829988x1 or email us for best pricing and/or bulk order.

Shipping: Free Shipping
Shipment: USPS
Delivery: 2-5 days (Continental US only) Storage: RT

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