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.
For clients seeking reliable third-party testing services for sex hormone analysis, our laboratory offers a comprehensive range of capabilities to support quality control, research, and regulatory compliance. We specialize in analyzing a variety of sex hormones, including but not limited to testosterone, estrogen, progesterone, and cortisol, across multiple matrices such as biological fluids, pharmaceutical formulations, and raw materials. Our services are designed to meet the stringent requirements of international standards and industry-specific applications.
Testing Scope
Our testing scope encompasses a wide range of sex hormones and their derivatives, catering to diverse industries. We serve clients in pharmaceutical development, biotechnology, and medical research by analyzing:
- Testosterone (total, free, and bound forms)
- Estrogen (estradiol, estrone, estriol)
- Progesterone
- Cortisol and other glucocorticoids
- Androstenedione and other androgens
Applicable products include pharmaceutical formulations, dietary supplements, clinical samples, and raw materials. We adhere to relevant standards such as ASTM D5868, ISO 17025, and EN ISO 15189 for method validation and quality assurance. Our capabilities are scalable to accommodate both routine testing and large-scale batch analysis, ensuring flexibility for various client needs.
Testing Items and Parameters
We perform a comprehensive analysis of sex hormones, focusing on key parameters to meet industry-specific requirements. Typical test items and parameters are outlined below:
| Test Item | Typical Parameters | Graded Limit Requirements |
|---|---|---|
| Testosterone | Concentration (ng/mL), Recovery (%) | ±5% for concentrations ≥50 ng/mL, ±10% for <50 ng/mL |
| Estrogen (Estradiol) | Concentration (pg/mL), Intraday CV (%) | ±8% for concentrations ≥20 pg/mL, ±12% for <20 pg/mL |
| Progesterone | Concentration (ng/mL), Interbatch CV (%) | ±6% for concentrations ≥10 ng/mL, ±10% for <10 ng/mL |
| Cortisol | Concentration (µg/dL), Accuracy (%) | ±7% for concentrations ≥0.5 µg/dL, ±11% for <0.5 µg/dL |
Additional parameters may include degradation products, impurities, and stability assessments, depending on the client's requirements. All testing is conducted using validated methods, ensuring consistent and reproducible results.
Data and Variation Analysis
Our laboratory employs rigorous statistical methods to assess parallel-sample and batch-to-batch variation, ensuring data reliability and compliance with international standards. Parallel-sample variation is evaluated using relative deviation, where the mean of triplicate samples is compared to the target value. Typically, relative deviation remains within ±5% for stable matrices and ±8% for variable matrices.
Batch-to-batch variation is analyzed by comparing results from consecutive batches of the same sample type. Acceptance windows are established based on historical data, with typical limits set at ±10% for routine testing and ±7% for critical applications. All variation data is documented and reported, providing clients with transparency and confidence in their results.
Statistical process control (SPC) charts are utilized to monitor ongoing performance, ensuring methodologies remain within predefined limits. This approach guarantees consistent accuracy and precision, meeting the highest standards of third-party testing.
For any testing requirements or queries, please contact our technical team to confirm your item list and sample quantity. We will revert with a formal quotation and expected schedule tailored to your needs.