|Use:||Spectrophotometry encompasses a number of techniques involving measurement of the absorption spectra of narrow band widths of radiation.|
A simple spectrophotometer consists of the following:
Visible spectrometry covers the range of 380 to 780 nm and uses tungsten lamps as the radiation source, glass or quartz prisms in the monochromators, and photo-multiplier cells as the detector.
UV spectrometers cover the region from 200 to 400 nm and usually use a hydrogen lamp as a radiation source, a quartz prism in the monochromator, and a photo-multiplier tube as the detector.
Requires extraction to a liquid that does not adsorb UV (hexane).
|1. Non-Halogenated VOCs||3. Halogenated VOCs||5. PAHs|
|Requires extraction to a liquid or gas phase||BETTER||ADEQUATE|
|Selectivity:||Technique measures a part of the compound.|
|Susceptibility to Interference:||High.|
|Detection Limits :||100-100 ppb (soil); 1-50 ppb (water).|
|Turnaround Time per Sample:||Minutes.|
|9065||Phenolics (Spectrophotometric, Manual 4-AAP with Distillation).|
|9067||Phenolics (Spectrophotometric, Manual MBTH with Distillation).|
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