The FSTest Malathion Rapid Test Kit is a professional-grade, rapid screening tool engineered for the qualitative detection of malathion residues in fresh fruits and vegetables.

Malathion is a widely monitored organophosphate insecticide. By eliminating the immediate necessity for complex and costly laboratory infrastructure (such as HPLC or GC-MS), this field-ready assay compresses agricultural chemical extraction into a simplified room-temperature workflow, serving as an essential first-line defense in fresh produce logistics, crop management, and corporate food safety compliance screening programs in just 8 to 10 minutes.

2. Key Benefits

High-Speed Field Turnaround: Complete the entire workflow and read stable, highly reliable visual results within just 8 to 10 minutes post-sample-preparation.
Versatile Matrix Detection Limits: Dynamically targets regulatory cut-off thresholds ranging from 0.5 mg/kg up to 10 mg/kg by adjusting simple sample supernatant dilution ratios.
Fully Self-Contained Kit Architecture: Arrives fully packed with all necessary consumables—including 10 test cassettes, 10 microwells, 10 centrifuge tubes (2 mL), 60 mL dedicated extracting solution, and 2 sampling bottles (30 mL).
High Specificity & Zero Cross-Reactivity: Proven entirely unaffected by non-target agrochemicals up to 1 mg/L (including Carbendazim, Captan, and Imidacloprid).
Safe & Non-Toxic Formulation: Supplied with a specialized extraction solution certified as safe and non-toxic for operators, ensuring hassle-free processing on-site.

3. Technical Specifications & LOD Spectrum

Product Name	Malathion Rapid Test Kit (Colloidal Gold)
Target Analyte Compound	Malathion (CAS: 121-75-5 \| C₁₀H₁₉O₆PS₂ \| 330.358 g/mol)
Detection Principle	Competitive Lateral Flow Immunochromatography
Pack Size	10 tests / kit
Assay Run Time & Volume	8–10 minutes (results invalid after 10 minutes); 120 µL final prepared solution
Storage & Shelf Life	12 months sealed at 4–30°C in a cool, dry place (Do not freeze)

Matrix-Specific Dilution Guide & Target LOD Spectrum (X & Y Dilution Protocol)

Applicable Agricultural Produce Matrix	Targeted LOD (mg/kg)	Supernatant X (µL)	Extracting Solution Y (µL)
Garlic, head cabbage, cauliflower, tomato, radish, carrot, potato, Chinese yam, lychee	0.5 mg/kg	100 µL	0 µL
Onion, broccoli, celery, cherry tomato, asparagus, stem lettuce, lingonberry, mulberry, strawberry, eggplant, chili pepper	1.0 mg/kg	100 µL	100 µL
Spinach, leaf mustard greens, yardlong bean, kidney bean, edible-podded pea, lentil, broad bean, pea, orange, mandarin, apple, pear	2.0 mg/kg	50 µL	150 µL
Orange, lemon, pomelo (peel/oil matrices)	4.0 mg/kg	20 µL	140 µL
Green onion, Chinese kale, turnip greens	5.0 mg/kg	20 µL	180 µL
Peach, nectarine, fresh jujube, apricot, plum, cherry	6.0 mg/kg	20 µL	220 µL
Flowering Chinese cabbage	7.0 mg/kg	20 µL	260 µL
Common Chinese cabbage, leaf lettuce, stem lettuce leaves, Chinese cabbage, sweet potato, taro, grape	8.0 mg/kg	20 µL	300 µL
Blueberry	10.0 mg/kg	20 µL	380 µL

4. Applicable Sample Types

Extensively validated across diverse fresh produce categories:

Bulb & Solanaceous Vegetables (Garlic, onion, green onion, tomato, cherry tomato, eggplant, chili pepper) Brassica & Leafy Greens (Head cabbage, cauliflower, broccoli, Chinese kale, spinach, mustard greens, celery, lettuce) Legumes, Roots & Tubers (Yardlong bean, kidney bean, pea, lentil, broad bean, radish, carrot, potato, yam, taro) Fruits & Citrus (Citrus peels/oils, apple, pear, peach, nectarine, jujube, plum, cherry, grape, strawberry, blueberry, lychee)

5. Test Procedure

STEP 1

Extraction

Cut fresh sample into 0.5 cm pieces. Weigh 2 g into sampling bottle, add 5 mL Extracting Solution, shake 1 min, let stand 1 min. (Centrifuge if cloudy).

STEP 2

Matrix Dilution

Pipette X µL clear supernatant into a 2 mL tube, add Y µL extracting solution according to the matrix guide, and swirl/shake to mix thoroughly.

STEP 3

Microwell & Load

Ensure 20–40°C environment. Pipette 120 µL test solution into microwell, mix 30 s, stand 2 min. Transfer all to cassette sample well.

STEP 4

Read at 8–10 Mins

Interpret visual lines strictly at 8–10 minutes. Visual readouts become strictly invalid after 10 minutes due to late chemical shifts.

Visual Results Determination Guide:

Negative (-): Both Control (C) line and Test (T) line develop strong, distinct red bands. Malathion residue is safely below the targeted matrix LOD limit.
Positive (+): Control (C) line develops normally, but Test (T) line is visibly lighter or fails to appear → Malathion residue ≥ targeted matrix LOD limit.
Invalid: Control (C) line fails to show any visible color band. Re-testing with a new cassette is required.

6. Performance & Crucial Operational Controls

Adhere to strict operational parameters to ensure maximum screening accuracy:

Qualitative Screening Purpose: Engineered strictly for qualitative preliminary screening; not intended for precise quantitative concentration evaluation.
Matrix Dilution Accuracy: Strictly execute the X & Y dilution ratio corresponding to the commodity type to calibrate reading against exact regulatory MRL cutoffs.
Strict Time Window: Read visual test results strictly between 8–10 minutes after loading the cassette; results observed after 10 minutes are invalid.

7. Included Components & Auxiliary Equipment

Kit Components Included: 10 Test cassettes, 10 Microwells, 10 Centrifuge tubes (2 mL), Extracting Solution (60 mL) x1, 30 mL Sampling bottles (x2), User Manual.
Required Equipment (Not Provided): Scissors, electronic balance (2 g precision), micropipettes (X & Y µL, 120 µL), vortexer, centrifuge (optional, for turbid extracts), and timer.

Request Samples & Ordering Information

Evaluate the FSTest Malathion Rapid Test Kit in your fresh produce supply chain and export quality assurance workflows. Free evaluation sample packs are available for certified testing laboratories and agricultural exporters.

Email: service@fstestcorp.com | Website: www.fstestcorp.com