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.
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×.
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).
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.
The enzymes on the strips need to be around pH 7, and your fruit juice is likely pretty acidic. Adjust the pH of your samples with NaOH or another base until it is ~7, and rerun the strips. You may also want to try diluting the sample in water, since high levels of lactate can “max out” the strips. This will also help with the pH since water is 7.
Yokus, MA et al. (2019). Towards wearable electrochemical lactate sensing using osmotic-capillary microfluidic pumping. 2019 IEEE SENSORS, 1-4. Assay: L-Lactic Acid in model sweat.
Li, F et al. (2021). Limosilactobacillus balticus sp. Nov., Limosilactobacillus agrestis sp. Nov., Limosilactobacillus albertensis sp. Nov., Limosilactobacillus rudii sp. Nov. And Limosilactobacillus fastidiosus sp. Nov., five novel Limosilactobacillus species isolated from the vertebrate gastrointestinal tract, and proposal of six subspecies of Limosilactobacillus reuteri adapted to the gastrointestinal tract of specific vertebrate hosts. International Journal of Systematic and Evolutionary Microbiology, 71(2). Assay: L-Lactic Acid in fermentation cultures.
Saha, T et al. (2021). Wearable osmotic-capillary patch for prolonged sweat harvesting and sensing. ACS Applied Materials & Interfaces, 13(7): 8071-8081. Assay: L-Lactic Acid in model sweat.
To find more recent publications, please click here.
If you or your labs do not have the equipment or scientists necessary to run this assay, BioAssay Systems can perform the service for you.
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