V-750 UV-Vis Spectrophotometer
The optical design employs ‘true double beam optics’ with a chopper providing timed sample, reference and dark current measurements.A high sensitivity PMT (photomultiplier tube) provides accurate and reproducible measurements of both low (and high) concentration samples. By controlling the high voltage applied to the PMT, the dynode feedback circuit allows a wider dynamic range. It also provides excellent sensitivity for diffu…
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The optical design employs ‘true double beam optics’ with a chopper providing timed sample, reference and dark current measurements.
A high sensitivity PMT (photomultiplier tube) provides accurate and reproducible measurements of both low (and high) concentration samples. By controlling the high voltage applied to the PMT, the dynode feedback circuit allows a wider dynamic range. It also provides excellent sensitivity for diffuse reflectance or transmittance of solid and liquid samples using an integrating sphere. The spectral bandwidth can be set as narrow as 0.1 nm for high resolution measurements, such as gas and vapor phase spectroscopy. Special low stray light slit settings which optimize the light image on the monochromator provide increased linearity of up to 5 absorbance units.
With a comprehensive range of sampling accessories, the V-750 is well suited to measurement of samples in the UV and visible regions, with temperature control for biological samples and a number of transmittance and reflectance accessories for materials analysis.
Luminous color measurement
In this application note, JASCO introduces methods for evaluating luminous colors and color rendering by a JASCO spectrophotometer for the development of LED, Organic EL, and PDP displays. Moreover, a method for evaluating the colors of liquid crystal displays (LCD) using the same system is also introduced.
Evaluation of cosmetic sunscreens using a spectroscopic SPF/PA measurement system
In this application note, an SPF/PA evaluation system based on the ISO standards was used to calculate the SPF and the PA values from the transmittance spectra of sunscreens using a UV-visible spectrophotometer. A special cell was developed and used to reproduce the application of sunscreen at a rate of 2 μL per 1 cm2.
Analysis of the melting temperature and thermodynamic parameters of a nucleic acid using a UV-visible spectrophotometer
In this application note, JASCO evaluates the melting temperature and thermodynamic parameters of a nucleic acid sample, using a V-700 Series UV-visible spectrophotometer with PAC-743 Automatic 6/8-position Peltier cell changer, which can measure up to eight samples simultaneously.
