Cold Vapor Atomic Absorption
Cold Vapor Atomic Absorption Spectroscopy (CVAAS) has been one of the most prominent techniques used for mercury analysis. It is capable of detecting trace levels of mercury in water supplies as well as biological samples. The RA-7000A Cold Vapor Mercury Analyzer from Nippon Instruments Corporation (NIC) is a crucial tool for laboratory use in this regard.
The RA-7000A performs cold vapor atomic absorption for CVAAS mercury analysis according to traditional EPA and other regulatory methods in waters, wastewaters, soils, sediments, sludges & other biological and environmental compounds. The EPA-compliant RA-7000A is unique in that it measures aqueous, acidified samples using automated discrete direct purge (DDP) technology as opposed to continuous flow, resulting in a waste reduction of over 80%. It does this without the need for any compressed gases and includes a built-in enclosure to protect the integrity of your samples. With the ability to begin with an economical single-sample configuration, the RA-7000A Series has options to expand when needed to include automated analysis and even fully automated digestion & analysis. The RA-7000A Mercury Analyzers are a fit for every laboratory that requires cold vapor atomic absorption spectroscopy for mercury.
RA-7000A CVAA Mercury Analyzer Key Features:
- Discrete, direct purge (DDP) of mercury from each sample…simplifying operation while eliminating carryover and reducing waste
- No compressed gases required thanks to a built-in carrier gas pump, which reduces operational costs
- Detection down to low ppt without the use of gold amalgamation or CVAFS
- Modular design allows for single-sample system with upgrade path to 80, 160 or 240 sample capacity autosamplers for liquids or pre-digested solids
- Multiple configurations available for mercury analysis of waters, digested solids, and even automated digestion of solids
- Automatic quenching of potassium permanganate (or other oxidants)…removing this step from the user’s requirements reduces time/cost by improving efficiency in the lab
- Ability to use multiple sample tube types (not recommended for automated digestion)
- Sample: waters, wastewaters, liquid & solid digestates, & more
- Detection method: Cold-vapor atomic absorption spectrometry
- Measuring range: 0.0005 to 400 ppb with linear range up to 40ppb
- Number of samples: single (manual) / optional 80, 160 & 240 positions by autosampler
- Measuring method: Reducing vaporization
