Spectrophotometry
Varian Cary 5
Our laboratory is equipped with a Varian (now Agilent) Cary 5 UV-Vis-NIR spectrophotometer. Even today, it delivers performance that surpasses many current standard systems in terms of precision, wavelength range, and stray light suppression. The proven optical design, which is also used in its successor (the Cary 5000), allows for reliable measurements down to a photometric density of 6 Abs in a wavelength range of 175 nm to 3300 nm (UV-Vis to NIR), with a high wavelength resolution of <0.04 nm.
The Cary 5 is a dual-beam spectrophotometer. The light source can be selected from either a halogen or a deuterium lamp. After passing through a dual monochromator, the light is split into a sample beam and a reference beam. This compensates for light source intensity variations and other fluctuations in real time, guaranteeing excellent baseline stability. A classic photomultiplier (PMT) is used for the UV-Vis range and a Peltier-cooled PbS detector for the NIR range.
Possible applications
- Measurement of transmission and absorption (extinction) in solids, coatings, and liquid samples.
- Precise determination of the optical band gap of semiconductors and nanomaterials.
- Time-resolved monitoring of chemical processes.
- High-precision concentration determinations, even for samples with high optical density.
- Indirect particle size determination via plasmon resonance and Mie scattering.
The SENpro spectroscopic ellipsometer is available for measuring reflection spectra in the VIS-NIR range.
Contact Person
Währinger Straße 38-42
1090
Wien
Room: 3327
Email
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+43-1-4277-73813
Terms of use and usage fees
This device can be used autonomously after successful training.
To be authorised to use this device, you must pass the following tests:
- General Safety Guidelines for Faculty Members
- Laboratory Safety
| User group | Hourly Rate |
|---|---|
| Faculties of Physics and Chemistry | - |
| Vienna Life Science Instruments | 5 € |
| University users | 10 € |
| Non-university users | 20 € |
We also charge for the costs of our staff for training sessions and measurements that cannot be carried out independently.
| User group | Hourly Rate for the Operator | Note |
|---|---|---|
| Faculties of Physics and Chemistry | - | |
| Vienna Life Science Instruments | 70 € | 1. |
| University users | 70 € | 1. |
| Non-university users | 100 € |
- Under a publication agreement, the hourly rate for our employees is also waived.
Specifications
| Device Parameter | Value or Range |
|---|---|
| Spectral Bandwith | UV-VIS from 0.01 to 5.00 nm NIR from 0.04 to 20.0 nm |
| Signal Averaging | from 0.033 to 999 sec |
| Scan Rate | up to 2000 nm/min UV-Vis, up to 8000 nm/min NIR |
| Beam Modes | double beam, single beam. both with beam interchange selectable |
| Reference Modes | automatic. (fixed SBW UV-Vis range. fixed energy NIR range), fixed SBW. fixed energy |
| Measurement Types | Parameters that can be measured |
|---|---|
| Ordinate Modes | absorbance, %transmission, %reflectance, 1 st to 6th derivative, log absorbance, concentration |
| Abscissa Modes | nanometres, time, millimetres, sample number |
| Wavelength Scanning | unique electronically synchronized high speed non-measurement phase stepping system, data interval selectable lrom 0.005 nm. to 1.11 nm, 0.02 nm to 4.44 nm NIR slew rate 1600 nm/min UV-Vis. 64000 nm/min |
| Photometric Performance | Value or Range |
|---|---|
| Stray Light | Less than (approx. 6.1 ABS) at 220 nm |
| Wavelength | 175 bis 900 nm UV-Vis 900 bis 3300 nm NIR |
| Wavelength Accuracy | ± 0.1 nm UV-Vis ± 0.4 nm NIR |
| Wavelength Reproducibility | UV-Vis ±0.03 nm NIR ±0.12 nm |
| Photometrie Accuracy | ±0.003 ABS at 1 Abs ±0.002 ABS at 0.5 Abs (using NIST 930D filters) |
| Photometrie Range | direct reading ±5.5ABS |
| Photometrie Display | ±9.99999 Absorbance 0.000 to 200.000% T |
| Photometrie Reproducibility | ±0.0004 at 1 ABS ±0.0002 ABS at 0.5 ABS using NIST 9300 filters, at 546.1 nm. 2 nm SBW. 2 sec. SAT |
| Photometrie Stability | long term drift less than 0.0002 ABS per hour after 2 hours warm up. |
| Photometric Noise | Value or Range |
|---|---|
| UV-Vis | less than 0.00005 ABS RMS at 500 nm, 0 ABS, 1 sec. SAT, 2nm SBW |
| less than 0.00015 ABS RMS at 500 nm, 1 ABS, 1 sec. SAT, 2 nm SBW | |
| NIR | less than 0.00005 ABS RMS, 1500 nm. 0 ABS, 1 sec.SAT, 2 nm SBW |
| less than 0.0001 ABS RMS, 1500 nm. 1 ABS. 1 sec.SAT. 2 nm SBW | |
| less than 0.0005 ABS RMS. 1500 nm, 2 ABS, 1 sec.SAT. 2 nm SBW |
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