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Pyrifluquinazon – Reference Materials for Residue Analysis
Pyrifluquinazon Reference Materials PRECISION for Regulatory-Grade Residue Analysis
Ensure defensible results with HPC Standards high-purity Pyrifluquinazon reference materials. Optimized for LCMSMS workflows, our neat and ready-to-use solutions deliver robust retention, stable ion ratios, and reliable LOQs across challenging food and environmental matrices. Each lot includes full traceability, purity data, and measurement uncertainty for ISOIEC 17025 complianceplus optional stable isotope-labelled derivatives and metabolite standards to control matrix effects. Rely on proven quality, rapid support, and custom concentrations tailored to your accredited laboratory needs.
Product | Catalog No./ CAS No. | Quantity | Price | |
|---|---|---|---|---|
 | 680645 | 1X50MG | Please log in. | |
Pyrifluquinazon solution |  | 680646 | 1X1ML | Please log in. |
High-quality reference materials for Pyrifluquinazon to support reliable quantification and confirmation in food and environmental residue analysis. Produced under rigorous quality requirements, suitable for regulatory compliance and accredited laboratory workflows.
Overview
Pyrifluquinazon is a selective insecticide used primarily against piercing–sucking pests. It is applied in integrated pest management programs across specialty and broad-acre crops. Due to its selectivity and efficacy at low application rates, it is a relevant analyte in regulatory residue control and environmental monitoring.
As a target compound in official controls, validated analytical methods and traceable reference materials are essential for defensible results.
Uses and Target Pests
Designed to control whiteflies, aphids, psyllids, and other hemipteran pests on fruit, vegetables, ornamentals, and other high-value crops. Its use pattern focuses on preventing feeding damage and virus transmission by suppressing pest feeding behavior.
Rotation with different modes of action is recommended to mitigate resistance development.
Mode of Action
Pyrifluquinazon acts as a feeding inhibitor on piercing–sucking insects, leading to rapid cessation of feeding and reduced honeydew production. This results in indirect protection against vector-borne plant viruses and reduced pest pressure.
It is classified within the IRAC system as a selective feeding blocker (Group 9). Always consult the latest IRAC guidance for subgrouping and resistance-management recommendations.
Physicochemical Considerations
Moderate molecular polarity and aromatic functionality suggest suitability for LC-based separations. The compound is typically thermally labile for routine GC without derivatization. Stability is influenced by light and temperature; amber containers and controlled storage are recommended.
Matrix effects can be pronounced in high-water and high-sugar commodities, requiring optimized cleanup and matrix-matched calibration.
Regulatory Landscape
Regulatory status, authorized uses, and maximum residue limits (MRLs) vary by country/region. Laboratories must consult current legislation and databases (e.g., Codex, EU, EPA, national authorities) for commodity-specific MRLs and enforcement policies.
Documentation should include traceability to recognized standards, method validation records, and proficiency testing where applicable.
Residue Monitoring and Compliance
Monitoring programs focus on high-consumption commodities and vulnerable matrices (leafy greens, berries, cucurbits). Targeted and multi-residue screenings are applied to verify MRL compliance and import tolerances.
Confirmatory analysis with independent ion transitions or qualifier ratios is expected for enforcement-grade reporting.
Sampling and Sample Preparation
Representative primary sampling is critical; follow ISO/IEC and Codex guidance for lot-based sampling. Homogenize thoroughly to minimize subsampling error.
Common extraction approaches: QuEChERS (citrate or acetate buffers) with dispersive-SPE cleanup (PSA/C18/GCB as matrix-dependent). For challenging matrices, cartridge SPE or dilute-and-shoot with post-column compensation may be used.
Analytical Methods
Preferred technique: LC–MS/MS in MRM mode. Typical workflows include reversed-phase separation with short gradients and ESI positive or negative mode depending on method optimization. HRMS is used for non-target screening and confirmation.
Key parameters: robust retention, minimal carryover, and stable ion ratios. Employ internal standards for correction of matrix effects.
Method Validation
Validate according to SANTE/ISO/IEC 17025 or equivalent guidelines: specificity, calibration linearity, recovery, precision (repeatability/reproducibility), LOQ, and measurement uncertainty.
Acceptable recovery typically 70–120% with RSD ≤20% at the LOQ. Include ongoing QC (blanks, spikes, duplicates) and control charts.
Matrices and LOQs
Typical matrices: fruits, vegetables, cereals, herbs, tea, and processed foods; environmental water and soil as needed. Achievable LOQs are usually in the low µg/kg range for food and low ng/L for water with optimized LC–MS/MS.
Use matrix-matched or standard addition calibration to achieve regulatory LOQs with acceptable bias and precision.
Quality Assurance and Accreditation
Operate under ISO/IEC 17025 with documented traceability of calibrants to certified reference materials. Participate in proficiency tests for pyrifluquinazon when available.
Maintain full audit trails: calibration records, instrument maintenance, and lot traceability of reference materials.
Health Impact – Human Toxicity
Based on available evaluations, pyrifluquinazon exhibits low acute toxicity to mammals under typical exposure scenarios when handled properly. Nonetheless, exposure should be minimized in occupational settings.
Risk assessments consider dietary intake relative to ADI/ARfD (region-specific). Implement appropriate laboratory hygiene to avoid ingestion, inhalation, or dermal exposure.
Environmental Impact – Fate and Ecotoxicology
Environmental behavior depends on formulation, use pattern, and local conditions. Potential risks include effects on aquatic invertebrates and non-target arthropods. Drift and runoff controls are important.
Assess persistence and mobility when conducting environmental monitoring; include surface water and sediment where relevant.
Effects on Wildlife and Pollinators
Like many insecticides targeting sap-feeding pests, there may be hazards to beneficial insects under certain exposure routes. Apply risk mitigation: timing applications to avoid bloom, using targeted application methods, and respecting buffer zones.
Environmental monitoring can include sentinel species or non-target arthropod surveys when required by permits.
Occupational Safety Measures
Use appropriate PPE when handling concentrates, working solutions, and reference materials: lab coat, gloves (nitrile), eye protection, and fume hood for weighing/preparation.
Implement spill control procedures, segregated chemical storage, and waste disposal according to local regulations.
Storage and Handling
Store pyrifluquinazon reference materials tightly closed in amber vials at controlled temperature as stated on the certificate. Minimize freeze–thaw cycles; prepare single-use aliquots for routine work.
Record opening dates and maintain stability logs to ensure data integrity over the shelf life.
Transport and Stability
Ship under conditions that preserve stability (temperature control, light protection). Inspect shipments on receipt and verify lot numbers and accompanying documentation.
Use validated storage conditions and track chain-of-custody for regulated samples.
Cross-Contamination and Lab Hygiene
Prevent false positives by physical separation of high-level standards from low-level calibration solutions and samples. Use dedicated glassware and autosampler vials; verify system cleanliness with procedural blanks.
Regularly assess carryover and memory effects; implement rinse protocols and needle washes in LC–MS/MS.
Reference Materials from HPC Standards
HPC Standards GmbH supplies pyrifluquinazon reference materials designed for quantitative and qualitative residue analysis. Products are accompanied by detailed documentation including purity, traceability, assigned values, and measurement uncertainty.
Available formats include neat materials and ready-to-use solutions; custom concentrations and mixtures on request. Stable isotope-labelled derivatives and metabolite reference materials are available to enhance method robustness and correct for matrix effects.
Documentation and Support
Each lot is delivered with a comprehensive certificate of analysis and safety data sheet. Technical support includes method guidance, stability information, and selection of appropriate calibration strategies.
HPC Standards is your partner for pesticide, veterinary drug, metabolite, and isotope-labelled reference materials for food and environmental analysis, manufactured and tested to international quality requirements.