- Professional technical support team
- Advanced testing equipment of famous brands
- Free testing consultancy
- On-site technical training services for suppliers
- Saving 20% in testing cost compared with other testing solution
Composition analysis is essential for identifying unknown substances, determining the composition of complex materials, and verifying product quality. It enables rapid qualitative and quantitative analysis of target samples, helping to characterize raw materials, additives, specific components, contaminants, and foreign matter. This is critical for failure analysis, reverse engineering, quality control, and regulatory compliance across industries such as manufacturing, automotive, aerospace, and consumer goods.
We offer comprehensive composition analysis for three major material categories: metals, plastics, and textiles. Below are the key techniques and instruments we employ, along with common examples we analyze.
| Instrument | Principle | Application |
|---|---|---|
| ICP-AES / ICP-OES | Uses plasma excitation to vaporize and atomize the sample. Atoms and ions emit characteristic light, which is separated by wavelength and detected for qualitative and quantitative analysis. | Trace element analysis, alloy composition, heavy metal detection. |
| XRF | Irradiates the sample with X-rays, exciting fluorescent X-rays of various wavelengths. The mixed X-rays are separated by wavelength or energy to measure intensity. | Non-destructive elemental analysis of solids, powders, and liquids. |
| Spectrophotometer (UV-Vis) | Uses a multi-wavelength light source; after passing through the sample, the absorbed light is measured and converted to concentration. | Colorimetric analysis, certain metal ion concentrations. |
| C/S Meter | Based on characteristic chemical reactions, such as precipitation, titration, and complexation, to determine the content of specific components. | Classical wet chemistry for precise quantification of major elements. |
| Property Analyzed | Instrument / Method |
|---|---|
| Functional groups | FTIR |
| Melting point | DSC |
| Glass transition temperature (Tg) | DSC |
| Thermal stability / decomposition temperature | TGA |
| Method | Principle | Application |
|---|---|---|
| Combustion method | Fibers have distinct burning behaviors, such as flame color, smell, and residue, based on chemical composition. | Rapid field identification of major fiber types. |
| Microscopy | Longitudinal and cross-sectional morphological features are unique to fiber types. | Visual identification using optical or electron microscopy. |
| Chemical dissolution method | Solubility in specific solvents varies with fiber chemical structure. | Definitive identification under controlled conditions. |
We are equipped with a full suite of analytical instruments, including:
For specific testing proposals to your products, please contact us via labtest@v-trust.com.
V-Trust's lab which is accredited by CNAS, CMA & CPSC. Where a Test report or Certificate is issued to the Client, V-Trust will provide the Services using reasonable care and skill and in accordance with the Codes of Practice or Regulations. A copy of such Codes of Practice, and any amendments to it as may be issued from time to time, will be supplied by V-Trust to the Client upon commencement of the Services. V-Trust's services (hereinafter called "services") consist of work performed, including but not limited to:
Food contact materials: LFGB, DGCCRF, EC1935/2004 (EU), FDA, etc.
Electronics & Electrical appliances: RoHS, LVD, EMC, FCC, RED, etc.
Infant & child products: EN71, ASTM F963, CPSIA, CPC, etc.
Harmful substances: REACH, POPs, California 65, etc.
- Falling out of its scope of activity or specialization.
- Presenting geographical accessibility problems, such as services to be rendered or products to be found in restricted or highly remote areas.
- Requiring V-Trust to obtain special permissions to operate such as governmental permissions.
- The client's special instructions when ordering the service and as confirmed by V-Trust – the terms of reference should be duly signed by the client and V-Trust, and in the absence of such instructions:
- Any relevant professional standard, trade custom, usage or practice.
- Such methods as V-Trust shall consider appropriate on technical, operational and/or financial grounds.