📝 Before testing, samples should be brought to room temperature (20–30°C). Take fresh samples, wipe off soil, and cut into pieces smaller than 1 cm square. Weigh 2.00±0.05 g of sample into a 15 mL centrifuge tube, then add 4 mL of extraction liquid. Cap the tube and vortex or manually shake up and down for 1 min. Let it stand for 1 min to obtain the test solution. Note: After sample preparation, spotting should be completed within 5 min. Sampling method refers to the "Measures for the Administration of Food Safety Sampling and Inspection" (2019 Order No. 15 of the State Administration), and national standard limits refer to GB2763.

Before testing, the sample should be returned to room temperature (20–30°C). Take a fresh sample, wipe off soil, and cut into pieces smaller than 1 cm square. Weigh 2.00 ± 0.05 g of sample into a 15 mL centrifuge tube, then add 4 mL of extraction solution. Close the cap, vortex or manually shake up and down for 1 min, and let stand for 1 min. This is the test solution. Note: After sample preparation, spotting should be completed within 5 min. The sampling method refers to the "Management Measures for Food Safety Sampling Inspection" (2019 Decree No. 15 of the State Administration for Market Regulation), and the national standard limits refer to GB 2763.

🧪 Test Procedure

Before the experiment, carefully read the operating instructions. Before use, allow the test card and test sample to reach room temperature (20～30°C). Remove the test card from its original packaging, label it, and use immediately. Using a pipette, draw 100 μL of the test sample and slowly drip it vertically into the sample well (S well), or use the disposable dropper provided in the kit to slowly drip 3 drops vertically into the sample well (S well). Start timing when the liquid begins to flow. Allow to react for 10 min, then proceed immediately.