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

DDT is a highly regulated, persistent organochlorine pesticide. By bypassing the need for complex, time-consuming laboratory chromatography infrastructure (such as GC-MS), this field-ready kit compresses agricultural sample extraction into a simplified room-temperature workflow, serving as an indispensable first-line defense in fresh produce supply chains and corporate food safety compliance monitoring programs in just 10 to 12 minutes.

2. Key Benefits

Rapid Field Turnaround: Complete the entire assay workflow and achieve highly reliable visual result readouts within just 10 to 12 minutes post-preparation.
Highly Sensitive Baseline Detection: Calibrated to yield dependable qualitative screenings at a strict Limit of Detection (LOD) of 0.2 mg/kg (ppm) across fresh produce matrices.
Fully Self-Contained Kit Architecture: Arrives fully packed with 10 test cassettes, 10 microwells, 1 bottle of extracting solution (50 mL), and 10 sampling bottles (30 mL).
High Specificity & Zero Cross-Reactivity: Rigorously validated to show zero cross-reactivity with non-target agrochemicals up to 1 mg/L (including Thiamethoxam, Triazophos, Parathion, Carbofuran, and Omethoate).
Safe & Non-Toxic Formulation: Supplied with an officially certified safe and non-toxic specialized extraction solution for hassle-free processing on-site.

3. Technical Specifications & LOD Spectrum

Product Name	DDT Rapid Test Kit (Colloidal Gold)
Target Analyte Compound	DDT (2,2-bis-(p-Chlorophenyl)-1,1,1-trichloroethane) (CAS: 50-29-3)
Detection Principle	Competitive Inhibition Lateral Flow Immunochromatography
Pack Size	10 tests / kit
Assay Run Time & Volume	10–12 minutes (results invalid after 12 minutes); 120 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 Sensitivity Spectrum (Limit of Detection / LOD)

Target Analyte Compound	CAS Registry Number	LOD Threshold
DDT (2,2-bis-(p-Chlorophenyl)-1,1,1-trichloroethane)	50-29-3	0.2 mg/kg (ppm)

4. Applicable Sample Types

Validated for multi-matrix organochlorine screening across fresh agricultural produce:

Fresh Fruit Commodities (Apples, pears, citrus, stone fruits, berries, tropical fruits) Leafy & Brassica Vegetables (Cabbage, spinach, 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 30 mL sampling bottle, add 3 mL extracting solution, vortex 2 min, let stand 1 min.

STEP 2

Microwell Step

Ensure 20–40°C environment. Pipette 120 µL clear supernatant into microwell, mix gently 3–5 times, and let stand undisturbed for 3 min.

STEP 3

Load Cassette

Transfer 120 µL of mixed solution from microwell directly into round sample hole on cassette. Start timing immediately for lateral flow migration.

STEP 4

Read at 10–12 Mins

Interpret visual lines strictly at 10–12 minutes. Visual readouts become strictly invalid after 12 minutes due to late chemical shifts.

Visual Results Determination Guide:

Negative (-): Both Control (C) line and Test (T) line develop strong, distinct red bands. DDT residue is safely below 0.2 mg/kg.
Positive (+): Control (C) line develops normally, but Test (T) line is visibly lighter or fails to appear → DDT residue ≥ 0.2 mg/kg 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 foil pouch to avoid ambient moisture damage.
Strict Time Window: Read visual test results strictly between 10–12 minutes after loading cassette; results observed after 12 minutes are invalid.

7. Included Components & Auxiliary Equipment

Kit Components Included: 10 Test cassettes, 10 Microwells, Extracting solution (50 mL) x1, 30 mL Sampling bottles (x10), User Manual.
Required Equipment (Not Provided): Scissors, electronic balance (2.0 ± 0.1 g precision), micropipette (120 µL), vortexer, and timer.

Request Samples & Ordering Information

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

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