Home > Chemical Detection > Technology > Molecular Spectroscopy > Ultraviolet-Visible (UV-Vis)

Ultraviolet-visible (UV-Vis) spectroscopy is a technique that identifies chemicals based on the interaction of molecules with electromagnetic radiation in the ultraviolet-visible region (10,000-33,333cm-1 or 300-1000 nm). Molecular absorbances of UV-Vis light cause electronic transitions within molecules. These transitions typically occur with the presence of a transition metal ion, or a conjugated organic molecule. There are UV-Vis reference databases, but there is much less specificity in a UV-Vis spectrum compared to MIR data, making it a secondary verification technique with unknown chemicals. Point analysis (“bench top”) systems are used for analyzing liquid phase materials, although a few systems are also capable of analyzing gases and solids. UV-Vis instrumentation has been scaled down to hand-held size for specific colorimetric applications, but most research-grade instruments are of larger size, and are often combined with NIR instrumentation. Instrument are available that have either single light paths or multiple beams for simultaneous analysis of reference samples.   Additionally, some instruments are capable of making time-resolved measurements for kinetics experiments.    UV-Vis is an extremely mature analytical technique.  Many instruments are available commercially.  Cost widely variable and depends upon both the instrument configuration and the sophistication of the data analysis software.

Manufacturer
California Analytical Instruments, Inc. (1)
Eco Sensors (1)
Hach (1)
Horiba Scientific (3)
Siemens Industry, Inc. (1)
Transportability
Handheld (1)
Benchtop/Fixed (6)
Availability
Commercially Available (7)
Unit Cost
$5,000 - $10,000 (1)
$20,000 - $50,000 (1)
N/A (5)
Sample Introduction
Solid (4)
Vapor/Gas (3)
Sensitivity / Detection Limit
ppm (2)
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600 Series UV Fluorescent SO2

600 Series UV Fluorescent SO2

California Analytical Instruments, Inc.

The California Analytical Series 600 digital analyzer product line is designed around a state of th...

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DR 6000

DR 6000

Hach

The UV-VIS spectrophotometer DR 6000 delivers top performance for both routine laboratory tasks and ...

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PTI QuantaMaster 300

PTI QuantaMaster 300

Horiba Scientific

The PTI QuantaMaster™ 300 is the photoluminescence version of the PTI QuantaMaster modular bench-top...

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PTI QuantaMaster 400

PTI QuantaMaster 400

Horiba Scientific

world’s famous, versatile modular design from PTI, very high sensitivity (S/N=20,000:1 by FSD metho...

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PTI QuantaMaster 500

PTI QuantaMaster 500

Horiba Scientific

PTI QuantaMaster 500 is the NIR version of the PTI QuantaMaster modular bench-top spectrometer famil...

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Siprocess UV600 Continuous Gas Analyzer

Siprocess UV600 Continuous Gas Analyzer

Siemens Industry, Inc.

SIPROCESS UV600 is an extractive UV gas analyzer that can simultaneously measure up to three compone...

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UV Ozone Analyzer

UV Ozone Analyzer

Eco Sensors

General purpose measurement of ozone in air. Has a range of .01-999 ppm with 2% accuracy. Includes a...

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