📝 Before testing, samples should be brought to room temperature (20–30°C). For fresh samples, wipe off soil, then cut into pieces smaller than 1 cm². Weigh 1.00 ± 0.05 g of sample into a 15 mL centrifuge tube, add 6 mL of extraction liquid, cap the tube, vortex or manually shake vigorously for 1 min, and let stand for 1 min to obtain the sample solution. Based on the testing requirements, dilute according to the table below to obtain the test solution. Sample Name | National Standard Limit (mg/kg) | Sample Solution (µL) + Extraction Liquid (µL) Melon fruits | 0.2 | 50 + 350 Head cabbage, cucumber, pepper | 0.5 | 20 + 380 Pear | 1 | 10 + 390 Spinach, onion | 2 | 10 + 790 Note: The above table does not list all testable samples. The applicability of unlisted samples should be confirmed with our technical center. After sample preparation, spotting should be completed within 5 min. Sampling method refers to the "Food Safety Sampling Inspection Management Measures" (2019 Order No. 15), and national standard limits refer to GB 2763.

Before testing, the sample should be returned to room temperature (20–30 °C). Wipe off any soil from the fresh sample and cut it into pieces smaller than 1 cm in size. Weigh 1.00 ± 0.05 g of the sample into a 15 mL centrifuge tube, add 6 mL of extraction solution, close the cap, vortex or manually shake up and down for 1 min, and let stand for 1 min to obtain the sample solution. According to the testing requirements, dilute as per the table below to obtain the test solution. | Sample Name | National Standard Limit (mg/kg) | Sample Solution (µL) + Extraction Solution (µL) | |-------------|--------------------------------|-------------------------------------------------| | Melon-type fruits | 0.2 | 50 + 350 | | Head cabbage, cucumber, pepper | 0.5 | 20 + 380 | | Pear | 1 | 10 + 390 | | Spinach, onion | 2 | 10 + 790 | Note: The table above does not list all measurable samples. The applicability of unlisted samples must be confirmed with our Technical Center. After sample preparation is completed, spotting should be finished within 5 min. The sampling method refers to the "Food Safety Sampling Inspection Management Measures" (2019 Order No. 15), and the national standard limits refer to GB 2763.

🧪 Test Procedure

before the experiment, Before the experiment, please carefully read the instruction manual. Before use, allow the test card and the test sample to equilibrate to room temperature. Remove the test card from the original packaging bag, open it, and use immediately. Using a pipette, vertically and slowly add 100 μL of the test solution into the sample well (S well), or use the disposable dropper provided in the kit to slowly and vertically add 3 drops of the test solution into the sample well (S well). Begin timing when liquid starts to flow. React for 10 min. Then proceed immediately.