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.
Selecting a testing partner for interleukin cell detection begins with understanding the full scope of analytical services offered. At our CNAS/CMA-accredited laboratory, we specialize in advanced detection methods tailored to diverse applications in immunology, pharmacology, and medical research. Our capabilities are designed to address both routine quality control and complex research requirements, ensuring compliance with global regulatory standards.
Testing Scope
Our interleukin cell detection services cover a wide range of biological samples including cell cultures, tissue extracts, serum, plasma, and biological fluids. We accommodate various interleukin types (IL-1 through IL-36, IL-17, and related cytokines), catering to applications in drug development, vaccine efficacy testing, autoimmune disease research, and personalized medicine. Product grades range from raw biological materials to purified recombinant proteins, with standard application scenarios spanning preclinical studies, clinical trial biomarkers, and diagnostic assays. Commonly referenced standards include ISO 13485 for medical devices, ASTM F2579 for in-vitro diagnostic test systems, and EN 15469 for biochemical analysis.
Testing Items and Parameters
The testing items encompass quantitative detection, functional activity assessment, and immunophenotyping of interleukin cells. Typical parameters include:
| Parameter | Typical Range | Graded Limit Requirement |
|---|---|---|
| Concentration (pg/mL) | 0.1 - 1000 | ±15% for concentrations ≤ 100, ±10% for 100-1000 |
| Specificity (%) | ≥ 98 | Must meet ≥ 95% in compliance testing |
| Recovery Rate (%) | 85 - 115 | Within ±10% of expected value |
| Linearity (R²) | ≥ 0.99 | Must be above 0.98 for regulatory submissions |
Additional parameters include detection limit (typically 0.01 pg/mL), sample stability under storage conditions, and cross-reactivity with non-target interleukins (≤ 5% overlap). All results are reported against international reference curves established per WHO guidelines.
Data and Variation Analysis
Parallel-sample and batch-to-batch variation is rigorously assessed through statistical process control methods. For each test run, at least three parallel samples are analyzed to calculate relative deviation (RD) using the formula RD = (Sample Mean - Reference Mean)/Reference Mean × 100%. Typically, RD remains below 8% for quantitative parameters in stable operating conditions. Batch-to-batch variation is monitored monthly through 20-sample analysis sets, with mean relative standard deviation (RSD) maintained below 5% across consecutive shifts. Acceptance windows are established based on 30 consecutive days of data, defining the upper and lower control limits (UCL/LCL) at ±3 standard deviations from the mean. Any deviation outside these windows triggers immediate investigation through root-cause analysis of reagent batch changes, instrument alignment, or environmental conditions.
Results reporting includes both absolute values and statistical significance (p-values < 0.05) for comparative studies. Our capability narrative emphasizes traceability through ISO 17025-compliant documentation, ensuring all variations are documented against validated methodologies.
Clients are welcome to share drawings, material grades or purchase specifications so that the testing plan can be matched precisely to their requirements. Our technical team is available for preliminary consultation to optimize sample handling and analytical approaches.