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.

Mandatory labeling of tree nuts in food

In order to protect consumers from the potentially fatal consequences of walnut consumption, allergen labelling is required by law in many countries. Walnuts, along with other tree nuts, are regulated for example in the EU(Opens external link in new windowRegulation (EU) No 1169/201) or U.S. (Opens external link in new windowFDA – FALCPA 2004).

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.



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.

Click on the item number below for more information.

Item No. No. of Tests
AgraStrip® Walnut
10002028 10



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.

Click on the item numbers below for more information.

Item No. Quantitation Range Limit of Detection No. of Wells
AgraQuant® Walnut
10002030 2 - 60 ppm 0.35 ppm 48


Item No. Product Description
Readers for Result Quantification
10002756 StatFax® ELISA Reader (Awareness Technology, Inc.) Stat Fax® 4700
10002740 800 TS Reader incl. Gen5 SW  (BioTek Instruments Inc.) BioTek® 800 TS Compact Microplate Reader (405, 450, 490 and 630 nm)
10002699 ChroMate® ELISA Reader (Awareness Technology, Inc.) ChroMate® 4300


Looking for more information?  

Contact us now!Knowledge CenterOnline Shop