The characterisation of polymer main components as well as the detailed recording of additives and fillers are one of our core topics. UV stabilisers, flame retardants and glass fibre contents are just as much our concern as ageing or leaching processes.
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Plastics are a science in themselves. We can offer you the necessary depth of detail, no matter whether you need a quick incoming goods inspection or whether you are interested in the most exact content of a UV stabiliser.
Our in house examination methods have grown with the queries of our customers, which is why we are sure to be able to offer you the most suitable method for your demands.
The following questions often occupy us:
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Material identifications by means of infrared spectroscopy are interesting as a fast and cost effective method for compounders and injection moulders as well as for processing companies.
Infrared Spectroscopy FT-IR
Ph. Eur. 10, 2.2.24 – Infrared spectroscopy [accredited method: PL-19422-01]
The best known and most widely used method for the analysis of organic compounds. After excitation with an IR source, each functional group in a molecule absorbs energy at distinguished frequencies. The spectra obtained are additive, from summation of individual components. Therefore, single components under 1% of the total cannot be detected with certainty.
A typical relative measurement uncertainty for quantitative analyses is ±10%.
The determination of the contents of glass fibres and/or glass beads is often decisive for material properties. We offer quantitative and qualitative determination using various methods (e.e. SEM-EDX).
Scanning Electron Microscopy with Energy Dispersive X-Ray according to DIN ISO 22309:2015-11 SEM-EDS
[accredited method: PL-19422-01]
Microbeam analysis – Quantitative analysis using energy-dispersive spectrometry (EDS) for elements with an atomic number of 11 (Na) or above. Good results will be obtained for mass fractions down to 1%. SEM-EDS is the standard method for surface and particle analysis. Single particles can be inspected and identified on the basis of the emitted X-Ray spectra.
A typical relative measurement uncertainty for quantitative analyses is ±10%.
Thermogravimetric analysis (TGA) is ideally suited for breaking down plastics in term of individual components.
Thermogravimetric analysis TGA
TGA is a method of thermal analysis or thermal analytics in which the mass change of a sample is measured as a function of temperature and time.
Are your materials used in medical devices? Then tests for leachable substances (leachables) may be an interesting topic for you. This can concern both organic substances (e.g. phthalate plasticisers) and inorganic substances such as catalyst residues. We are able to offer you the required tests.
Gas Chromatography coupled with Mass Spectrometry GC-MS
Ph.Eur. 10,2.2.28 - Gas Chromatography [accredited method: PL-19422-01]
This is the most sensitive method to analyze single components in complex mixtures. But only organic substances which can be vaporized without decomposition can be analyzed.
Organic compounds generate so called mass spectra. To identify unknown compounds the mass spectra will be compared with the NIST library in a current issue. This comprehensive library is the world’s most widely used mass spectral reference library with more than 240.000 entries.
A typical relative measurement uncertainty is ±10%.
High performance liquid Chromatography with UV Detector HPLC-UV
Ph. Eur. 10, 2.2.29
HPLC is a chromatographic method in which larger molecules in solution can be separated. The high separating capacity of the chromatographic system is used to determine single compounds in complex mixtures. The high linearity provided by the UV detector for UV active components makes it suitable for quantitative work.
A typical relative measurement uncertainty is ±10%.
Inductive coupled plasma mass spectrometry ICP-MS
ICP-MS is one of the most sensitive methods in inorganic trace analysis. Qualitative as well as quantitative analysis of almost all metals and metalloids in solution can be carried out at the same time. For quantification, selected elements are measured against a certified standard. For survey measurements a semi-quantitative program is used.
A typical relative measurement uncertainty is ±10%
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