📝 Before testing, samples should be returned to room temperature (20–30°C). Take fresh samples, wipe off soil, and cut into pieces smaller than 1 cm². Weigh 2.00±0.05 g of sample into a 15 mL centrifuge tube, add 6 mL of extraction solution, close the lid, vortex or manually shake up and down for 1 min, and let stand for 5 min to obtain the sample solution. According to detection requirements, dilute and mix as per the table below to obtain the test solution. Sample Name | National Standard Limit (mg/kg) | Sample Solution (µL) + Extraction Solution (µL) Cowpea, hyacinth bean, melon fruits (except watermelon) | 0.5 | No dilution needed, directly used as test solution Cucumber, broccoli | 1 | 450 + 550 Scallion | 3 | 160 + 840 Leaf lettuce, head lettuce, celery | 4 | 120 + 880 Ginger | 7 | 80 + 920 Note: The table above does not list all detectable samples. For applicability of unlisted samples, please contact our technical center. After sample preparation, spot application should be completed within 5 min. Sampling method refers to the "Administrative Measures for Food Safety Sampling Inspection" (2019 Order No. 15 of the State Administration), and national standard limits refer to GB2763—2026.

Before testing, samples should be returned to room temperature (20–30°C). For fresh samples, wipe off any soil, then cut into pieces smaller than 1 cm in size. Weigh 2.00 ± 0.05 g of sample into a 15 mL centrifuge tube, add 6 mL of extraction solution, cap the tube, vortex or manually shake up and down for 1 min, then let stand for 5 min to obtain the sample solution. According to testing requirements, dilute and mix as per the table below to obtain the test solution. Sample Name | National Standard Limit (mg/kg) | Sample Solution (µL) + Extraction Solution (µL) Cowpea, hyacinth bean, melon-type fruits (except watermelon) | 0.5 | No dilution needed, use directly as test solution Cucumber, broccoli | 1 | 450 + 550 Scallion | 3 | 160 + 840 Leaf lettuce, head lettuce, celery | 4 | 120 + 880 Ginger | 7 | 80 + 920 Note: The table above does not list all measurable samples. Applicability for unlisted samples must be confirmed with our technical center. 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" (Order No. 15 of the State Administration for Market Regulation, 2019). National standard limits refer to GB 2763—2026.

🧪 Test Procedure

before the experiment, Before the experiment, please read the instructions carefully. Equilibrate the test cassette and the sample to be tested to room temperature before use. Remove the test cassette from the original packaging bag and use it immediately after opening. Using a micropipette, aspirate 100 μL of the sample to be tested and slowly add it vertically into the sample well (S well), or use the disposable dropper provided in the kit to slowly add 3 drops vertically into the sample well (S well). Start timing when the liquid flows. React for 10 min, then immediately proceed.