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. Our Dunaliella Salina heavy metal residue testing services are designed to meet the stringent requirements of international clients, ensuring the safety and quality of algal products. We utilize advanced analytical techniques and maintain rigorous quality control measures to provide precise and dependable results.
Testing Scope
Our testing scope for Dunaliella Salina encompasses a wide range of heavy metals, including but not limited to arsenic (As), cadmium (Cd), lead (Pb), mercury (Hg), and chromium (Cr). This service is applicable to both raw Dunaliella Salina biomass and processed algal products such as concentrates, extracts, and nutritional supplements. The testing is relevant for products intended for human consumption, animal feed, and industrial applications. We follow international standards such as ASTM, ISO, EN, and GB to ensure consistency and comparability with global regulatory requirements.
Commonly referenced standards for Dunaliella Salina heavy metal residue testing include ASTM D7438 for inorganic contaminants in algae, ISO 14596 for heavy metals in aquatic plants, EN 15878 for microalgae, and GB/T 5009.11 for heavy metals in foodstuffs. These standards provide the framework for sample preparation, analysis, and reporting, ensuring that our results align with industry best practices.
Testing Items and Parameters
The testing items for Dunaliella Salina heavy metal residue analysis include a variety of metals, each with specific parameters and graded limit requirements. Below is a table summarizing typical parameters and acceptable limit values based on international standards:
| Heavy Metal | Typical Parameter (Method) | Graded Limit (mg/kg) |
|---|---|---|
| Arsenic (As) | ICP-MS or AAS | |
| Cadmium (Cd) | ICP-MS or AAS | |
| Lead (Pb) | ICP-MS or AAS | |
| Mercury (Hg) | AFS or ICP-MS | |
| Chromium (Cr) | AAS or ICP-MS |
These parameters and limits are based on current international guidelines and can be adjusted to meet specific client requirements. The analysis is performed using state-of-the-art equipment, including inductively coupled plasma mass spectrometry (ICP-MS) and atomic absorption spectroscopy (AAS), to ensure high precision and accuracy.
Data and Variation Analysis
In assessing parallel-sample and batch-to-batch variation, we employ statistical methods to evaluate the consistency and reliability of our test results. For parallel-sample analysis, the relative deviation between replicate samples is calculated to determine the precision of the measurement. Typically, the relative deviation for heavy metal residues in Dunaliella Salina is maintained within ±5% for most metals, ensuring that our results are highly reproducible.
Batch-to-batch variation is analyzed by comparing results from different production batches of Dunaliella Salina. The acceptance window for batch-to-batch variation is set based on historical data and industry standards, with typical limits of ±10% for most heavy metals. This analysis helps ensure that the product meets consistent quality criteria across different production cycles. All variation data is documented and reported in the final test certificates, providing clients with comprehensive information on the product's consistency and reliability.
We invite clients to confirm their specific testing item list and sample quantity. We will revert with a formal quotation and expected schedule based on the provided details.