UV-VIS Spectroscopy: Characterization and Quantitative Analysis
Ultraviolet-Visible (UV-VIS) Spectroscopy is a vital analytical technique used to characterize the absorption, transmission, and reflectivity properties of both organic and inorganic samples. In the context of medical devices, UV-VIS is routinely employed to quantify the concentration of specific light-absorbing molecules in device extracts or materials.
EBI’s specialized instrumentation is capable of scanning the spectrum from 200 nm (far ultraviolet) to 700 nm (near infrared), providing a comprehensive profile of the device’s optical and chemical characteristics.
Applications of UV-VIS in Biocompatibility
While other methods are used for complex mixture identification, UV-VIS is the gold standard for rapid, sensitive quantification. We use it to:
- Quantify Concentrations: Determining the exact amount of a specific absorbing molecule (such as an antioxidant or leachable dye) within a sample.
- Evaluate Optical Properties: Assessing the transmission and reflectivity of materials intended for ophthalmic or light-sensitive applications.
- Monitor Material Changes: Detecting shifts in absorption bands that may indicate degradation or chemical instability.
Methodology and Technical Scope
UV-VIS spectroscopy at EBI is performed using high-precision spectrophotometers:
- Spectral Scanning: Our instruments scan from 200 nm to 700 nm to capture the full electronic absorption profile of the sample.
- Quantitative Analysis: By measuring the intensity of light passing through a sample, we calculate the concentration of target molecules based on established calibration curves.
- Mixture Limitations: UV-VIS has limited use for identifying complex mixtures because electronic absorption bands often overlap; in such cases, we may recommend combining this with other chromatographic techniques.
Sample Requirements and Turnaround Time
For standardized UV-VIS characterization, the following samples are required:
- Material Dimensions: 30 cm² (thickness < 0.5 mm) or 15 cm² (thickness ≥ 0.5 mm).
- Weight/Volume: 5 grams for solid items or 5 ml for liquids.
- Minimum Quantity: At least 3 test items.
- Standard Turnaround Time: 4 weeks.
Compliance and Standards
Our UV-VIS testing services align with global analytical requirements:
- USP <851>: Spectrophotometry and Light-Scattering (formerly USP <197> context).
- ISO 10993-18: Chemical characterization of materials.
- Pharmacopeial Compliance: Methods tailored to satisfy EP and USP requirements for medical-grade extracts.
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Delivery & Support
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FAQ: UV-VIS Spectroscopy
What is the spectral range of the UV-VIS test at EBI?
Our equipment covers the range from 200 nm, which captures the far ultraviolet region, up to 700 nm, which covers the visible light and reaches the near-infrared spectrum.
Can UV-VIS identify unknown mixtures?
UV-VIS is better suited for quantification than identification of complex mixtures. Because many molecules have overlapping absorption bands, we typically use it to measure the concentration of a known substance or as a preliminary screening tool.
Why is the turnaround time 4 weeks?
The 4-week period includes the rigorous extraction process (following ISO 10993-12), the analytical run, data verification, and the preparation of a final report that meets regulatory standards for medical device submissions.
What is the spectral range of the UV-VIS test at EBI?
Our equipment covers the range from 200 nm, which captures the far ultraviolet region, up to 700 nm, which covers the visible light and reaches the near-infrared spectrum.
Can UV-VIS identify unknown mixtures?
UV-VIS is better suited for quantification than identification of complex mixtures. Because many molecules have overlapping absorption bands, we typically use it to measure the concentration of a known substance or as a preliminary screening tool.
Why is the turnaround time 4 weeks?
The 4-week period includes the rigorous extraction process (following ISO 10993-12), the analytical run, data verification, and the preparation of a final report that meets regulatory standards for medical device submissions.
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Location:
Europejski Instytut Biomedyczny sp. z o.o.
ul. Bartycka 63A lok. 6, 00-716 Warszawa
Mail:
contact@ebi.bio
Phone:
+48 22 780 06 32
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