Spectrophotometer

Spectrophotometers are used to measure the concentration of a known substance in a solution. They do this by passing a light through the substance and measuring light intensity as a function of wavelength. Either single beam or double beam spectrophotometers can be purchased. In a single beam spectrophotometer, a reference standard is used to measure light intensity before and after the sample is loaded. For double beam spectrophotometers the beam is split with one beam passing through the standard and the other through the sample to compare intensities. While single beam spectrophotometers are typically less expensive and have higher sensitivity, double beam spectrophotometers tend to be more stable and easier to use. Spectrophotometers are important pieces of equipment in chemistry, physics, biochemistry, clinical, and materials testing labs.

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CompanyJASCOJASCO
ItemV-770 UV-Vis/NIR SpectrophotometerV-750 UV-Visible Spectrophotometer
Citations
(522)
(455)
Figures
(1)
(1)
Catalog NumberV-770V-750
Price
TypeUV-Visible/NIRUV-Visible
Wavelength Range190 to 2,700 nm (3,200 nm, option)190 to 900 nm
Wavelength Accuracy±0.3 nm (at 656.1 nm)
± 1.5 nm (at 1312.2 nm)		±0.2 nm (at 656.1 nm)
Scanning Speed10 to 4,000 nm/min (8,000 nm/min in preview mode)10 to 4,000 nm/min (8,000 nm/min in preview mode)
Spectral BandwidthUV-Vis:
0.1, 0.2, 0.5, 1, 2, 5, 10 nm
L2, L5, L10 nm (low stray light mode)
M1, M2 nm (micro cell mode)
NIR:
0.4, 0.8, 1, 2, 4, 8, 20, 40
L8, L20, L40 nm (low stray light mode)
M4, M8 nm (micro cell mode)		0.1, 0.2, 0.5, 1, 2, 5, 10 nm
L2, L5, L10 nm (low stray light mode)
M1, M2 nm (micro cell mode)
Optical SystemCzerny-Turner mount
Single monochromator
Fully symmetrical double beam type		Czerny-Turner mount
Double monochromator
Fully symmetrical double beam type
Light SourceHalogen lamp, Deuterium lampHalogen lamp, Deuterium lamp
Resolution=BS11=BS9
DescriptionThe V-770 UV-Visible/NIR Spectrophotometer features a unique single monochromator design for maximum light throughput with excellent absorbance linearity. A PMT detector is used for the UV to visible region and a Peltier-cooled PbS detector for the NIR region.The V-750 UV-Visible Spectrophotometer optical design uses precision double-beam optics with variable spectral bandwidth. A high sensitivity PMT detector provides accurate and reproducible measurements for low to high concentration samples. By controlling the high voltage applied to the PMT, the ... Read More
QuantityEAEA
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