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

Organophosphates, including Parathion-methyl, Fenitrothion, and Parathion, are highly regulated chemical agents widely monitored in global food safety. By eliminating the immediate necessity for complex and costly laboratory infrastructure (such as HPLC or GC-MS), this field-ready assay compresses agricultural pesticide extraction into a simplified room-temperature workflow, delivering reliable visual results within 8 to 10 minutes for fresh produce logistics, harvesting points, and corporate food safety compliance screening programs.

2. Key Benefits

High-Speed Field Turnaround: Complete the entire screening workflow and read stable, highly reliable visual results within just 8 to 10 minutes post-sample-preparation.
Broad-Spectrum Multi-Analyte Detection: Calibrated to yield dependable qualitative screenings for major organophosphate compounds at strict target thresholds (Parathion-methyl at 500 µg/kg, Parathion at 200 µg/kg, and Fenitrothion at 2 mg/kg).
Fully Self-Contained Kit Architecture: Arrives fully packed with 10 test cassettes, 10 microwells, 2 sampling bottles (30 mL), and 1 bottle of dedicated extracting solution (35 mL).
High Specificity & Zero Cross-Reactivity: Proven to stay entirely unaffected by alternative agrochemicals up to 1 mg/L (including Imidacloprid and Carbendazim).
Safe & Non-Toxic Formulation: Supplied with a certified safe and non-toxic extraction solution for hassle-free field testing.

3. Technical Specifications & LOD Spectrum

Product Name	Organophosphates Rapid Test Kit
Target Analytes Class	Organophosphate Insecticides (Parathion-methyl, Fenitrothion, Parathion)
Detection Principle	Competitive Lateral Flow Immunochromatography
Pack Size	10 tests / kit
Assay Run Time & Volume	8–10 minutes (results invalid after 10 minutes); 100 µL mixed test solution
Storage & Shelf Life	12 months sealed at 4–30°C in a cool, dry place (Do not freeze)

Detailed Target Compound Analytical Profiles & Limits of Detection (LOD)

Active Target Ingredient	CAS Registry Number	Molecular Formula & Weight	LOD Threshold
Parathion-methyl	298-00-0	C₈H₁₀NO₅PS (263.207 g/mol)	500 µg/kg (0.5 mg/kg)
Parathion	56-38-2	C₁₀H₁₄NO₅PS (291.261 g/mol)	200 µg/kg (0.2 mg/kg)
Fenitrothion	122-14-5	C₉H₁₂NO₅PS (277.234 g/mol)	2 mg/kg (2000 µg/kg)

4. Applicable Sample Types

Validated for multi-matrix organophosphate screening across agricultural produce:

Fresh Fruit Commodities (Apples, citrus, stone fruits, grapes, berries) Leafy & Brassica Vegetables (Spinach, cabbage, kale, lettuce, celery) Solanaceous, Cucurbits & Roots (Tomatoes, peppers, cucumbers, carrots, potatoes)

5. Test Procedure

STEP 1

Extraction

Cut fresh sample into 0.5 cm pieces. Weigh 2.0 ± 0.1 g into sampling bottle, add 3 mL extracting solution, shake vigorously 1 min, let stand 1 min.

STEP 2

Microwell Step

Ensure 20–40°C environment. Pipette 100 µL clear supernatant into microwell, mix 3–5 times with pipette, and let stand undisturbed for 3 min.

STEP 3

Load Cassette

Transfer 100 µL of mixed solution from microwell directly into round sample well on cassette. Start timing immediately for lateral flow migration.

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. Targeted organophosphate residues are safely below regulatory threshold cutoffs.
Positive (+): Control (C) line develops normally, but Test (T) line is visibly lighter or fails to appear → Organophosphate residues ≥ targeted threshold 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.
Time-Sensitive Exposure: Perform test within 1 hour after removing cassette from protective packaging to avoid moisture interference.
Strict Time Window: Read visual test results strictly between 8–10 minutes after loading cassette; results observed after 10 minutes are invalid.

7. Included Components & Auxiliary Equipment

Kit Components Included: 10 Test cassettes, 10 Microwells, Extracting solution (35 mL) x1, 30 mL Sampling bottles (x2), User Manual.
Required Equipment (Not Provided): Scissors, electronic balance (2.0 ± 0.1 g precision), micropipette (100 µL), centrifuge (optional, for turbid extracts), and timer.

Request Samples & Ordering Information

Evaluate the FSTest Organophosphates Rapid Test Kit in your fresh produce supply chain and export quality compliance screening workflows[cite: 20]. Free evaluation sample packs are available for certified testing laboratories and agricultural exporters.

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