Walnut Test KitsWalnut Test KitsWalnut Test Kits

Walnut Test Kits

food allergen testing

  • Food Allergen - Walnut
  • Walnut Test Kits for Lab and On-Site Detection
  • Fast and highly sensitive walnut analysis

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Model : 10002028

AgraStrip® Walnut

No. of Tests: 10


Model : 10002030

AgraQuant® Walnut

Quantitation Range: 2 - 60 ppm

Limit of Detection: 0.35 ppm

No. of Wells: 48

Walnut Test Kits for Lab and On-Site Detection

Walnuts are the nuts of trees that belong to the botanical family Juglandaceae. Beneath the hard shell are the seed kernels of the walnut, which are widely consumed raw or roasted, as well as ground into a paste or in the form of walnut meal in bakeries, ice cream, breakfast cereals or confectioneries.

Walnuts are generally considered very healthy due to their high content of essential fatty acids. But unfortunately, they contain also many proteins known to be allergenic. In fact, tree nuts are considered as one of the most frequent causes of food allergy, with walnut allergy being among them. The severity of the allergic reaction to walnuts can vary significantly between allergic individuals and is often linked to an allergy to birch pollen. Allergic reactions to walnuts can develop at any age.

Allergic people must strictly avoid the consumption of walnuts or walnut-containing food. As cross contamination during food production processes may occur, the food industry is required to use sensitive test kits to ensure that their products meet the highest levels of food safety.

Fast and highly sensitive walnut analysis

The Romer Labs walnut test kit portfolio covers ELISAs and LFDs for the quantitative and qualitative analysis of walnuts in environmental samples, rinse waters and finished food products.

AgraStrip® Lateral Flow Devices

The AgraStrip® Walnut test kit is a ready-to-use lateral flow device (LFD) for on-site testing. This immunological test allows a rapid analysis of a wide range of food samples within only 11 minutes (including extraction).

AgraStrip® LFDs represent a fast and simple qualitative strip test method in which specific antibodies labeled with colloidal gold are used for visual color development at a test and control zone.

The test kit comes complete with strips, antibody coated incubation vials, extraction tubes, an extraction buffer, surface swabs and additional accessories.


AgraStrip® Walnut (10002028)

AgraQuant® ELISA Tests

The AgraQuant® Walnut test kit is an accurate and reliable enzyme-linked immunosorbent assay (ELISA) in a quantitative format. Results are measured with a specific ELISA reader, such as the StatFax® or the BioTek® reader.

This ELISA test kit is the ideal solution for a parallel measurement of multiple samples with assay times of as low as 60 minutes for up to 38 samples.

AgraQuant® allergen test kits are sandwich ELISAs in a ready-to-use format to reduce handling errors and come with a set of 5 standards, an antibody coated plate, an extraction solution, a wash buffer, a conjugate, a substrate and a stop solution.


AgraQuant® Walnut (10002030)

AgraStrip® Walnut (10002028)

The AgraStrip® Walnut test kit is a lateral flow device (LFD) designed for the on-site detection of walnut residues in raw materials, finished food products and beverages, rinse waters and environmental samples. They allow for the simple, fast and reliable qualitative detection of walnut traces.


Storage temperature15°C - 25°C
Limit of detection10 ppm walnut, 10 µg/25 cm2 walnut (swab testing)
Number of tests10

Materials supplied

  • 1 tube with 10 AgraStrip® Walnut LFDs
  • 1 foil pouch with 10 incubation vials containing antibodies
  • 1 bottle of 35 mL ready-to-use extraction buffer with dropper cap
  • 10 extraction tubes and caps
  • 10 filtered dropper tips for the extraction tubes
  • 10 sterile swabs with pre-scored tips
  • 1 vial rack

Materials required but not supplied

  • blender for solid samples

AgraQuant® Walnut (10002030)

The AgraQuant® Walnut is a sandwich enzyme-linked immunosorbent assay (ELISA) designed for the quantitative analysis of walnut residues in food samples. Samples can vary from raw to processed foods, from environmental swabs to rinse water. This product is intended for laboratory use.


Storage temperature2°C - 8°C
Quantitation range2 - 60 ppm walnut
Limit of detection0.35 ppm walnut
Limit of quantitation2 ppm walnut
Number of wells48

Materials supplied

  • 48 antibody-coated microwells in a microwell holder sealed in a foil pouch
  • 5 ready-to-use standards (0; 2; 6; 20; and 60 ppm)
  • 1 bottle of concentrated (10X) extraction buffer
  • 1 bottle of concentrated (10X) wash buffer
  • 1 green-capped bottle of conjugate solution
  • 1 blue-capped bottle of substrate solution
  • 1 red-capped bottle of stop solution

Materials required but not supplied

  • Blender
  • analytical balance
  • 8-channel pipette
  • wash bottle
  • microwells/plate reader