Pesticide Residue Qualitative & Quantitative Detection Solution

— Based on Lanende Intelligent Technology’s Food Rapid Testing & Laboratory Instrument System

I. Overview

This solution focuses on full-chain pesticide residue risk prevention and control “from farm to table”, integrating rapid qualitative screening and laboratory-accurate quantitative analysis into a closed-loop detection system. It meets multi-level needs across agricultural production bases, farmers’ markets, supermarkets, school cafeterias, food testing centers, and regulatory agencies. The solution fully complies with national standards (e.g., GB 2763-2021, GB/T 5009.199-2003), ensuring traceable data and enforceable results [1,2,3,5,11,12,14].

Core approach:

• Qualitative detection: Quickly determine whether common pesticide residues such as organophosphates and carbamates are present, focusing on on-site interception and preliminary risk screening.

• Quantitative detection: Precisely quantify positive samples identified in qualitative testing to obtain residue concentrations, supporting enforcement penalties and risk assessment.

II. Target Items & Scope of Application

• Target items: Plant-derived agricultural products such as vegetables, fruits, edible mushrooms, tea leaves, and cereals.

• Applicable scenarios:
        

a. Pre-harvest sampling at production bases

b. Rapid testing during circulation in farmers’ markets/supermarkets

c. Raw material acceptance at schools/institutional cafeterias

d. Confirmatory analysis in food testing laboratories

e. Regulatory supervision sampling and law enforcement evidence collection [1,3,7,12,13,14]

III. Qualitative Detection Solution

3.1 Detection Principle

• Enzyme inhibition colorimetric method: Based on the inhibitory effect of organophosphates and carbamate pesticides on acetylcholinesterase activity; color development absorbance changes indicate inhibition rate, with ≥50% inhibition rate considered positive [12,14].

• Colloidal gold immunochromatography: Utilizes antigen‑antibody specific binding to rapidly detect certain pesticides (e.g., dichlorvos, chlorpyrifos) for on-site high-risk screening [5,12].

3.2 Recommended Equipment & Configuration

• Multi-channel pesticide residue rapid tester (8–24 channels)
        

￮ Test time ≤10–15 minutes per batch

￮ Detection limit ≤0.01 mg/kg, compliant with GB/T 5009.199-2003

￮ Built-in standard curve library, automatic result reading to avoid manual error [12,13,14]

• Portable fruit & vegetable pesticide residue tester (weight ≤3 kg, built-in lithium battery)
        

￮ 7-inch touchscreen, operable without external power supply

￮ Suitable for field use, mobile testing vehicles, etc. [13,14]

• Pesticide residue detector (dual-mode: enzyme inhibition & colloidal gold)
        

￮ Covers pre-harvest sampling, market incoming inspection, and regulatory spot checks [1,3]

3.3 Operating Procedure

1. Sample preparation: Homogenization → centrifugation → extract preparation

2. Reagent addition & color development: Add reagents → react at 37 ℃ ± 0.1 ℃

3. Result interpretation: Instrument automatically calculates inhibition rate or reads colloidal gold band color

4. Data management: Real-time upload to “Smart Food Safety” or regulatory platform; on-site report printing [1,3,12]

3.4 Advantages

• High throughput (up to 1,500 batches/day)

• Simple training enables non-specialists to operate

• Rapidly identifies risky samples, reducing subsequent testing workload [1,7,13]

IV. Quantitative Detection Solution

4.1 Detection Principle

• Gas chromatography (GC): Suitable for accurate quantification of organophosphates, pyrethroids, neonicotinoids, etc.; high separation efficiency and sensitivity [4].

• High-performance liquid chromatography (HPLC)/LC-MS/MS: Suitable for thermally unstable or highly polar pesticides and simultaneous multi-residue quantification.

• Spectrophotometry/atomic fluorescence spectrometry: For quantification of specific pesticides or metabolites [11].

4.2 Recommended Equipment & Configuration (Laboratory Confirmatory Grade)

• Gas chromatograph (e.g., LD-GC510Plus / LD-GC610)
        

￮ Temperature control accuracy ±0.1–0.2 ℃, programmable temperature ramp up to 16 stages

￮ FID detector: detection limit Mt ≤ 5×10⁻¹¹ g/s

￮ TCD detector: sensitivity S ≥ 3500 mV·ml/mg

￮ Supports network remote control and automatic data acquisition [4]

• Multifunctional food safety detector (lab version)

￮ Integrated spectrophotometry & colloidal gold modules; quantification limit down to 0.01 mg/kg, accuracy error ≤ ±1%

￮ Covers 200+ parameters including pesticide residues, veterinary drug residues, heavy metals [1,5,11]

• Sample pretreatment equipment

￮ Microwave digestion system/graphite digestion system: follows GB 5009.268-2020, high-throughput digestion [9,10]

￮ Nitrogen evaporator: concentrates extracts to required volume, detection limit down to 0.001 mg/kg [9,15]

￮ High-speed refrigerated centrifuge, homogenizer, electronic balance (accuracy 0.01 g) [12,15]

4.3 Operating Procedure

1. Sample pretreatment: Grinding → homogenization → extraction (organic solvent/buffer) → centrifugation → nitrogen evaporation concentration

2. Clean-up: Solid-phase extraction (SPE) to remove matrix interference [3,15]

3. Instrumental analysis: GC/HPLC/LC-MS/MS analysis with quantification via standard curves

4. Data processing: Automatic concentration calculation, generation of traceable test reports

5. Result upload: Interface with LIMS or regulatory platforms for centralized management and risk alerts [1,9,11]

4.4 Advantages

• Low detection limits (some down to 0.001 mg/kg), meeting export and high-standard regulatory requirements

• Simultaneous multi-analyte detection reduces sample usage and analysis time

• Traceable data supports enforcement and quality assessment [4,11,15]

V. Solution Features & Value-Added Services

1. Full-chain coverage

￮ Seamless integration of qualitative rapid testing and quantitative confirmation from production base to table [1,3,7]

2. Technology integration

￮ Incorporates optoelectronics, IoT, big data, and AI into instruments for remote monitoring and intelligent analysis [1,2]

3. Data connectivity & traceability

￮ Wireless transmission (WiFi/4G), cloud storage, QR code traceability, and regulatory platform interfacing [1,3,12]

4. Customized services

￮ Configurable test items, equipment combinations, and training programs; procurement cost savings of 25%–30% compared with fragmented purchasing [1,5]

5. Certification assurance

￮ ISO9001 certification, multiple patents and software copyrights ensure stability and reliability [1,2]

VI. Typical Application Cases

• Farmers’ market fruit & vegetable rapid testing station: Standardized station equipped with multi-channel rapid testers; 15-minute reporting and public display; daily capacity up to 1,500 batches, automatic alerts for anomalies [1,3,7].

• School cafeteria raw material testing lab: Multi-channel intelligent detector + pretreatment equipment ensures daily morning inspections for student meal safety [14].

• Agriculture and Rural Affairs Bureau testing center: Multifunctional food safety detector + GC covers pesticide residues, heavy metals, etc., supporting origin exit and market access [11].

VII. Conclusion

Through the two-tier architecture of qualitative rapid testing to lock risks → quantitative confirmation to fix evidence, this solution meets both high-frequency on-site screening efficiency needs and law-enforcement-grade precision in the laboratory, fully reflecting the core concept of “Technology Empowers Enterprise Efficiency” [1,2,3]. The system flexibly adapts to users of different scales and scenarios, providing solid technical support for China’s agricultural product quality and safety and international trade compliance.

References correspond to knowledge base citations and national standards as listed in the original Chinese document.

This translation maintains the professional, authoritative tone required for international industry communication and aligns precisely with the technical parameters and brand positioning from the knowledge base.