FSTest Omethoate Rapid Test Kit (10 Tests)

Product Overview

The FSTest Omethoate Rapid Test Kit is a professional-grade, rapid screening tool engineered for the qualitative detection of omethoate residues in a broad range of vegetables. Omethoate is a highly regulated organophosphorus insecticide. Ensuring strict residue tracking is vital for agricultural crop growers, food supply chain operators, and export compliance auditors striving to conform with global 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 chemical extraction into a simplified, room-temperature workflow. It provides an essential first-line defense in fresh produce logistics, crop management, and corporate food safety compliance screening programs.

Product Highlights & 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.

· Highly Sensitive Baseline Detection: Calibrated to yield dependable screenings at a strict Limit of Detection (LOD) of 0.5 mg/kg (ppm) across various food matrices.

· Comprehensive Vegetable Matrix Matching: Validated for wide adaptability, covering Bulb, Brassica, Leafy, Solanaceous, Cucurbit, Legume, Stem, Root/Tuber/Rhizome, and Aquatic vegetable categories.

· Definite Visual Interpretation: Utilizes a competitive inhibition immunochromatography assay format where the color intensity of the Test (T) line shares an opposite correspondence with the omethoate concentration, removing analytical ambiguity.

· High Specificity & Zero Cross-Reactivity: Proven to stay entirely unaffected by non-target agrochemicals. Samples containing up to 10 mg/kg of alternative treatments—including Carbofuran, Triazophos, Carbendazim, and Chlorothalonil—consistently return negative results.

· Safe & Non-Toxic Sample Prep: The specialized extraction solution supplied in the kit is certified as safe and non-toxic for operators, ensuring hassle-free processing on-site.

Technical Principle: Lateral Flow Immunochromatography

The test strip is based on the principle of competitive inhibition immunochromatography. 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 + Gold-labeled Specific Antibodies -> Lateral Flow -> Competition for Immobilized Antigen at T-Zone -> Visual T & C Line Signal Interpretation

Specifications & General Parameters

Comprehensive Vegetable Application Guide

· Bulb vegetables: garlic, onion, scallion, garlic scape, green garlic.

· Brassica vegetables: cabbage, red cabbage, cauliflower, broccoli, Chinese kale, flowering Chinese cabbage.

· Leafy vegetables: spinach, amaranth, leaf lettuce, endive, sweet potato leaves, celery, fennel, garland chrysanthemum, romaine lettuce, Chinese cabbage, pak choi.

· Solanaceous vegetables: eggplant, chili pepper.

· Cucurbit vegetables: cucumber, zucchini, bitter melon, luffa, winter melon, pumpkin.

· Legume vegetables: yardlong bean, snow pea, sword bean.

· Stem vegetables: asparagus, stem lettuce.

· Root, tuber and rhizome vegetables: radish, carrot, sweet potato, ginger, potato.

· Aquatic vegetables: lotus root.

Step-by-Step Procedure

1. Simple Sample Extraction & Preparation

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

·  Primary Extraction: Weigh exactly 2 g of sample into a sampling bottle and mix with 3 mL of extracting solution.

·  Mixing & Settling: Vortex or shake the bottle thoroughly for 1 minute, then let it stand undisturbed for 1 minute. (Note: If the resulting supernatant liquid layer is cloudy or not completely clear, transfer 1 mL of fluid into a centrifuge tube and centrifuge at 4000 rpm for 3 minutes. The supernatant obtained after settling or centrifugation is used as the final test solution).

2. Running the Assay

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

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

· Transfer all of the mixed solution from the microwell directly into the round sample well on 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).