Reasons for choosing our testing services
ZHONGXI Testing has obtained inspection qualification certifications from multiple countries and regions worldwide. We possess a senior testing team and advanced testing methods, providing independent, impartial, and professional third-party verification services for global carbon projects.
Internationally recognized authority
Certified by multiple international standards such as CNAS, VCS, and GS, with reports universally applicable worldwide.
Global service capability
Covering 140+ countries and regions, it supports on-site detection and remote verification in multiple languages.
Professional experimental methods
Adopt standard experimental methods to ensure accurate and reliable data.
A well-defined testing scope is the first sign of a competent laboratory. In our CNAS/CMA-accredited facility, the lactoferrin biofilm inhibition test evaluates the efficacy of lactoferrin or lactoferrin-containing materials in disrupting microbial biofilm formation. This service is crucial for industries seeking advanced antimicrobial solutions, particularly in medical device applications, food preservation, and water treatment sectors. Our capabilities are demonstrated through rigorous adherence to international standards, ensuring reliable and reproducible results for clients requiring material performance validation.
Testing Scope
Our lactoferrin biofilm inhibition test is applicable to a wide range of products, including, but not limited to:
- Medical polymers and coatings (e.g., catheters, implants)
- Food packaging materials (e.g., films, coatings)
- Personal care products (e.g., topical formulations)
- Water treatment components (e.g., membranes, filters)
- Biologics and biopharmaceuticals (e.g., lactoferrin-based therapeutic agents)
Materials are tested across various grades and formulations, matching application scenarios such as contact with biological fluids or exposure to aqueous environments. Commonly referenced standards include ASTM International (ASTM), International Organization for Standardization (ISO), European Norm (EN), and Chinese Standard (GB) guidelines relevant to biofilm assessment. These standards ensure alignment with global regulatory requirements and industry best practices.
Testing Items and Parameters
The lactoferrin biofilm inhibition test evaluates multiple parameters to characterize antimicrobial efficacy. Key test items include:
- Biofilm formation quantification
- Microbial growth inhibition zones
- Lactoferrin concentration-activity relationship
- Material compatibility with lactoferrin
- Time-kill kinetics (optional)
Typical parameters and graded limit requirements are presented in the table below:
| Parameter | Typical Range | Graded Limit |
|---|---|---|
| Biofilm inhibition rate (%) | 0-100% | ≥50% (high efficacy), 20-50% (moderate), ≤20% (low) |
| Lactoferrin concentration (mg/mL) | 0.1-10 | 0.1 (minimal effective), 1 (optimal), 10 (saturation) |
| Kill time (hours) | 0.5-24 | |
| Material degradation index | 0-10 | ≤3 (stable), 3-7 (moderate), >7 (degraded) |
Results are graded based on standardized criteria, ensuring objective evaluation of material performance under defined conditions.
Data and Variation Analysis
In assessing parallel-sample and batch-to-batch variation, our methodology focuses on statistical precision and reproducibility. For parallel-sample variation, relative deviation (RD) is calculated between replicate tests as:
RD (%) = [(Result₂ - Result₁) / Average Result] × 100
Tolerable RD limits are set at ≤10% for biofilm inhibition rates and ≤15% for concentration-response data. Batch-to-batch variation is analyzed using coefficient of variation (CV) across independent material batches, with acceptance windows defined by:
CV (%) = (Standard Deviation / Mean) × 100
Typical acceptance criteria for CV are ≤15% for quantitative parameters and ≤20% for qualitative assessments. Statistical significance is confirmed via ANOVA (p ≤ 0.05), ensuring results meet stringent quality requirements. Data is reported with confidence intervals (95%), reflecting both precision and reliability for decision-making purposes.
Send us your testing item list and sample details, and our engineers will confirm the applicable items and turnaround within one working day.