Impurity Analysis

Composition analysis examines the ingredients that make up a material or formulation. Impurity analysis focuses on unwanted or unexpected components within it.

The distinction depends on context: an additive can be an intended ingredient in one product and a contaminant in another.

Yes. An investigation can begin with an unknown peak, particle, residue, or observed product change.

Share any existing data and, where possible, an accepted reference sample. The initial scope may involve screening before more targeted identification is possible.

A chromatogram can show where a signal occurs and how it differs between samples, but it generally cannot establish an unknown compound’s identity on its own.

Instrument conditions, detector information, mass spectra, reference standards, or additional testing may be needed. Blanks are also useful for checking whether a signal comes from sample preparation or the analytical system.

Some investigations benefit from separating or enriching the component of interest before further characterization.

Whether a sufficiently pure fraction can be obtained depends on the sample quantity, impurity level, stability, and separation behavior. Please specify if your project requires a recovered isolated material, as this needs a separate feasibility assessment.

The cost depends on sample complexity, the number of samples, required detection limits, analytical methods, and whether the project involves qualitative identification, quantitative measurement, or comparative analysis.

For multi-technique chemical composition projects, pricing typically starts from several thousand US dollars and may increase for complex formulations, trace-level testing, extensive sample preparation, or multiple comparison samples.

A tailored scope and quotation are prepared after reviewing the sample information, analytical objective, and required deliverables.

Sample requirements depend on the product type, formulation complexity and analytical methods required.

As a general guideline, about 100mL for liquid samples or about 10g for solid samples is often sufficient for many projects.

For complex, limited or unusual samples, please contact Xinbodi’s engineers before shipment so we can confirm the recommended sample quantity.

There is no single detection limit applicable to all impurities and materials.

Achievable detection and quantification limits depend on the target, analytical method, preparation, sample matrix, and interference. Provide the concentration or specification relevant to your decision so that method suitability can be evaluated.

Analysis can help narrow possible sources by comparing the contaminant with raw materials, packaging, process residues, or other suspected materials.

A chemical match supports an investigation but does not always establish the source conclusively. Process information and additional sampling may be necessary.

A combination of chemical analysis, sample comparison, and processing history can help evaluate these possibilities.

For example, an affected material may contain an external substance, a migrated ingredient, or products formed as the original material changed. Some investigations require additional evidence to distinguish these mechanisms.

We provide more than raw analytical data.

Depending on the project, our technical team can help interpret composition differences, identify possible formulation or material issues, compare raw materials and support:

• formulation adjustment
• raw-material selection
• small-scale formulation trials
• product optimization
• scale-up and production considerations

The goal is to help clients move from analytical results to practical R&D and manufacturing decisions.

No. It means the specified target was not detected under the reported method conditions and within the method’s detection capability.

Untargeted screening also has limits. A result should be interpreted within the analytical scope rather than as proof that no other impurities exist.