FSTest Organophosphates Rapid Test Kit (10 Tests)

Product Overview

The FSTest Organophosphates Rapid Test Kit (Lateral Flow) is a professional-grade, rapid screening tool engineered for the qualitative detection of organophosphate pesticide residues in fruits and vegetables. Organophosphates, including Parathion-methyl, Fenitrothion, and Parathion, are highly regulated chemical agents widely monitored in global food safety and agricultural trade. Ensuring strict residue tracking is vital for agricultural crop growers, food supply chain operators, and export compliance auditors striving to conform with international food safety standards and Maximum Residue Limits (MRLs).

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. It provides an essential first-line defense in fresh produce logistics, crop harvesting points, and corporate food safety compliance screening programs.

Product Highlights & 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, including 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 all necessary consumables—including 10 test cassettes, 10 microwells, 2 sampling bottles (30 mL), and 1 bottle of dedicated extracting solution (35 mL).

· Definite Visual Interpretation: Utilizes a competitive sandwich lateral flow immunochromatographic assay format where the color intensity of the Test (T) line shares an opposite correspondence with the organophosphate concentration, removing analytical ambiguity.

· High Specificity & Zero Cross-Reactivity: Proven to stay entirely unaffected by alternative agrochemicals. Samples containing 1 mg/L of common alternative treatments—including Imidacloprid and Carbendazim—consistently return clear negative results.

· Reliable Shelf-Life & Logistics: Unopened test kits can be safely kept in a sealed, cool, and dry location between 4–30°C for a full guaranteed shelf-life of up to 12 months. Do not freeze.

Technical Principle: Lateral Flow Immunochromatography

The test strip is based on a sandwich lateral flow immunochromatography mechanism. The test cassette houses an integrated observation window containing an invisible Test (T) zone and a Control (C) zone before fluidics activation.

Extracted Insecticide Residues + Antibody-Conjugates -> Lateral Flow -> Reaction with Pre-coated Recombinant Antigens -> Visual T & C Line Signal Interpretation

Specifications & General Parameters

Target Chemical Analytical Profiles

Step-by-Step Procedure

1. Simple Sample Extraction & Preparation

·  Comminution: Cut the fresh fruit or vegetable sample into small pieces (approx. 0.5 cm x 0.5 cm).

·  Primary Extraction: Weigh exactly 2.0 ± 0.1 g of sample pieces into a 30 mL sampling bottle and mix with 3 mL of the provided extracting solution.

·  Mixing & Settling: Shake vigorously for 1 minute, then let it stand undisturbed for 1 minute to allow the layers to separate. (Note: If the supernatant fluid is not completely clear, users may utilize standard filtration or centrifugation at 4000 rpm for 3 minutes to obtain clear test solution).

2. Running the Assay

· Prior to testing, ensure the test cassette has equilibrated to a proper operating temperature environment (20–40 degrees C) and place the device on a flat surface.

· Pipette exactly 100 uL of the prepared clear sample solution into a reagent microwell, mix for 3 to 5 times using the pipette fluidics, and let it stand undisturbed for 3 minutes.

· Transfer 100 uL of this mixed solution from the microwell directly into the sample well of the test cassette.

· Interpret the visual results between 8 to 10 minutes. (Do not read after 10 minutes, as late chemical shifts render the test invalid).