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Brooks - Model 1631 -Automated Mercury Analysis System
The standard Brooks Rand 1631 system combines easy to use automated analysis with manual purge and trap for a high-throughput, cost-effective system. This system consists of the Model III and the Amalgamation Control Module for automated trap analysis, along with the manual Purge and Trap Module. This semi-automated system allows for the simultaneous purging of multiple samples while previously loaded amalgamation traps are analyzed. The result is a throughput rate of less than 5 minutes per sample.
Manual 245.7 can easily be performed using the Model III, a ball flowmeter, and a multi-channel pump.
All systems come complete with the Brooks Rand Guru™ Software for system control and peak integration.
Trap Desorption Module
VERSATILE
Can be used with the Model III for all Method 1631 systems and for total mercury air analysis and monitoring systems.
SIMPLE OPERATION
Automates analysis from gold amalgamation trap with a single keystroke from Advanced Mercury Guru™ Software.
“ZERO” FOOTPRINT
The ACM is the same footprint as the Model III and can be stacked with the Model III, thereby taking up no additional lab bench space.
Sample Preparation
Prior to analysis, samples are prepared as per normal methylmercury methodology, typically distillation for water (US EPA 1630), extraction for sediment or digestion for tissue.
Vial Loading
Prepared samples are added to 40 mL vials with Teflon® lined septa caps. Samples are buffered to pH 4.9, ethylated with the addition of NaBEt4, topped off with DI water, capped, shaken and loaded into the autosampler.
Software Setup
Sample information is entered into Mercury Guru™ software, settings are selected and then sample analysis begins. MERX does the rest!
Liquid Handling
As each vial is pierced, the liquid is automatically transferred via gas pressure to a purge vessel where N2 gas volatilizes ethylated Hg species to a Tenax® trap.
Trap Processing
The first trap is dried while another trap collects ethylated Hg species from the next vial. After drying, another vial is purged onto a third trap while the second is dried, and the first trap, now dry, is ballistically heated to thermally release the Hg species in an argon carrier gas stream.
VERSATILE
Purge and trap modules are available in a variety of sizes ranging from 1 to 5 bubbler systems to match your throughput needs and budget.
ANALYST CONTROL
The manual purge and trap module allows ultimate flexibility for the analyst. Sample specific volumes and dilutions can be carried out to reduce the risks of overloading the system with mercury and to minimize reruns.