QuantiQuik™ Malic Acid Quick Test Strips

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ProtocolSDS

Application

Direct determination of malic 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 0-500 mg/L (undiluted) malic 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

Size

10 tests

Shelf Life

6 months

More Details

L-MALIC ACID, or L-malate, is a dicarboxylic acid that is made by all living organisms and plays an important role in the Calvin and Krebs Cycle. Malic acid is frequently used in food and beverage industries as an additive in products such as wine, beer, candies, etc. It can be used as an acidity regulator, preservative, or simply added for flavor. In the wine industry, decreasing levels of L-malic acid and increasing levels of L-Lactic Acid are monitored during malolactic fermentation. As L-malic acid is converted to L-lactic acid, the overall acidity of the wine is reduced which can lead to the improvement of the flavor of the wine. BioAssay Systems QuantiQuik™ L-Malic Acid Test Strips are based on L-malate dehydrogenase catalyzed oxidation of L-malic acid in which the formed NADH reduces a chromogenic reagent. The intensity of the product color is directly proportional to the L-malic acid concentration in the sample.

What samples have you tested?

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

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 500 mg/L. To obtain a more accurate concentration, the sample should be further diluted and retested. For example, if the sample was diluted 5&times, try diluting 21×.

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).

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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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.Simply send us your samples:- Fast turnaround - Quality data - Low costPlease email or call 1-510-782-9988 x 2 to request assay service.

品牌介绍

BioAssay Systems开发和销售创新的高通量分析解决方案，以满足生命科学行业不断增长的需求。BioAssay Systems的创始人在现代药物发现领域拥有50多年的丰富经验。在过去的15年中，我们已经开发了200多种用于药物发现和生命科学研究的检测试剂盒。我们以提供的服务和简单，易用且性能卓越的产品而感到自豪。

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