📝 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, add 6 mL of extraction solution, close the lid, and vortex or manually shake up and down for 1 min. 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) | | :--- | :--- | :--- | | Broccoli, Onion | 0.1 | No dilution needed, directly used as test solution | | Melon, Watermelon, Dragon fruit, Solanaceous vegetables (except tomato, eggplant, sweet pepper, okra), Zucchini, Winter melon, Hairy gourd | 0.2 | 800 + 200 | | Edamame | 0.3 | 600 + 400 | | Cowpea, Hyacinth bean | 0.4 | 440 + 560 | | Tangerine, Orange, Lemon, Grape, Papaya, Cabbage, Cauliflower, Bitter gourd, Radish, Kidney bean | 0.5 | 350 + 650 | | Garlic scape | 0.7 | 250 + 750 | | Apple, Asparagus | 0.8 | 235 + 765 | | Common cabbage, Chinese cabbage, Tomato, Eggplant, Sweet pepper, Okra, Cucumber, Snow pea, Fresh goji berry, Stem lettuce, Pumpkin | 1 | 180 + 820 | | Rape, Leaf lettuce | 1.5 | 100 + 900 | | Pear, Peach, Leek, Green garlic | 2 | 90 + 910 | | Banana, Choy sum, Celery, Watercress | 3 | 60 + 940 | | Green onion, Chinese kale, Spinach, Stem lettuce leaf, Leaf lettuce | 5 | 35 + 965 | Note: The table above does not list all testable samples. For samples not listed, please confirm applicability with our technical center. Sample application must be completed within 5 min after sample preparation. Sampling method refers to the "Measures for the Administration of Food Safety Sampling Inspection" (2019 State Administration Order No. 15), and national standard limits refer to GB 2763.

Before testing, samples should be restored to room temperature (20–30°C). Take fresh samples, wipe off soil, and cut into pieces smaller than 1 cm in size. Weigh 2.00 ± 0.05 g of sample into a 15 mL centrifuge tube, then add 6 mL of extraction solution, close the cap, vortex or manually shake up and down for 1 min, and 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) Broccoli, Onion | 0.1 | No dilution needed, use directly as test solution Melon, Watermelon, Dragon fruit, Solanaceous vegetables (except tomato, eggplant, sweet pepper, okra), Zucchini, Winter melon, Hairy melon | 0.2 | 800 + 200 Edamame | 0.3 | 600 + 400 Cowpea, Hyacinth bean | 0.4 | 440 + 560 Mandarin, Orange, Lemon, Grape, Papaya, Cabbage, Cauliflower, Bitter gourd, Radish, Kidney bean | 0.5 | 350 + 650 Garlic scape | 0.7 | 250 + 750 Apple, Asparagus | 0.8 | 235 + 765 Pak choi, Chinese cabbage, Tomato, Eggplant, Sweet pepper, Okra, Cucumber, Snow pea, Fresh wolfberry, Stem lettuce, Pumpkin | 1 | 180 + 820 Rape, Roman lettuce | 1.5 | 100 + 900 Pear, Peach, Chinese chive, Green garlic | 2 | 90 + 910 Banana, Choy sum, Celery, Watercress | 3 | 60 + 940 Scallion, Chinese kale, Spinach, Stem lettuce leaves, Leaf lettuce | 5 | 35 + 965 Note: The table does not list all testable samples. For the applicability of samples not listed, please confirm with our technical center. After sample preparation, spotting should be completed within 5 min. For sampling methods, refer to the "Administrative Measures for Food Safety Sampling Inspection" (2019 Order No. 15 of the State Administration), and for national standard limits, refer to GB 2763.

🧪 Test Procedure

before the experiment, Please read the instructions carefully before the experiment. Allow the test card and the sample to be tested to return to room temperature before use. Remove the test card from its original packaging and use it immediately after opening. Use a pipette to draw 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 draw the sample and slowly add 3 drops vertically into the sample well (S well). Start timing when the liquid flows, allow the reaction to proceed for 5 min, and read the results immediately.