Fully Automated Reducing-Vaporization Mercury Analyzer
Sensitive, accurate, efficient
Suitable for a wide variety of pre-digested sample solutions, aqueous samples, including drinking water, industrial wastewater, river water, lake water, seawater and rain-runoff
USEPA 245.1 | USEPA 245.2 | USEPA 245.5 | USEPA 7470A | USEPA 7471B | ASTM D 3223-17 | EN-1483 | APHA 3112 | JIS K0102 | ISO 12846 and more
Why Seamless Start to Finish?
To perform total mercury measurement, a sample solution must be first pre-digested and pre-oxidized to break down the complex mercury matrices, releasing all bounded organic mercury, and oxidizing all forms of mercury into stable ionic mercury before Reducing Vaporization and CVAAS measurement takes place.
Sample digestion and oxidation processes are often:
Time-consuming & labor intensive
According to EPA & APHA methods, it takes 2 hours for the sample solution to oxidize fully.
Tedious & hazardous
Multiple acids and oxidants are used for this process.
Machine versus Human
Manual handling and transfer is prone to mistake and error.
Specifically designed and engineered to provide peace of mind, all these problems are overcome by the superior features of RA-4500.
Fully Automated Sample Digestion - First of Its Kind
RA-4500 is one of the ground-breaking mercury analyzers in the market. Incorporating NIC's cutting-edge innovation and engineering, RA-4500 manages to automate the entire sample digestion and analysis process with compliance with regulatory methods such as EPA and APHA. It comes with programmable software where users can program up to 10 steps of sample digestion steps with proportionally reduced usage and consumption of reagents.
Minimum Memory Effect & Contamination
– Non-Contact LED Sensor
Superior Detection Limit and Sensitivity
– Detection Limit Down to 0.5 ppt
RA-4500 is equipped with a Non-Dispersive CVAAS, which has a detection limit of down to 0.5 ppt (5 ppt including sample digestion process) with excellent accuracy and precision. With this superior detection limit and excellent precision, it provides a wide range of applications to be analyzed in RA-4500, such as river water, lake water, industrial discharges, etc., easily satisfying all wastewater/effluent discharge guideline and regulations in most countries.
- Autosampler with 80 Positions
RA-4500 is equipped with an autosampler of 80 positions which maximizes the throughput of any fast-paced laboratory, providing results with the shortest turnaround time possible.
Effective & Complete Digestion Process
– Precise Thermal Control
The autosampler tray in RA-4500 is integrated with an innovative solution – a state-of-art Infrared Heating Technology, which provides rapid heating under stable temperature control.
An effective and complete digestion process is crucial to obtain an accurate total mercury measurement as this process ensures all organic mercury is oxidized and converted into ionic mercury. This can only be achieved by having stable and precise temperature control.
Lower Operation Cost
NO Carrier Gas Required
Almost all CVAAS requires purified carrier gas such as nitrogen or argon to operate, which incur facility and extra cost of operation. In RA-4500, there is no carrier gas required which lowers down laboratory operation cost and ease of setting up.
Reduced Consumption of High Purity Reagents
When it comes to trace level of mercury analysis, the purity of the reagent plays a vital role in having minimum interference to the analyte measurement. Consumption of high purity reagents is inevitable; thus, operating cost is high. For RA-4500, since the sample size is less (5mL), all reagents used are reduced proportionally. It has built-in reagent pumps that are incredibly robust and reliable to deliver reagents with high consistency. Thus, every measurement can be performed with accuracy and precision, with reagents consumption saving up to 50%.
Discrete-Direct-Purge Technique of Reducing Vaporization
Generally, there are two methods of Reducing Vaporization, i.e.,
- Flow Injection Technique
- Discrete-Direct-Purge Technique.
All mercury analyzers in NIC employ Discrete-Direct-Purge Technique to minimize memory effect from mercury which causes cross-contamination issue.
Ultra-trace level mercury solution for samples like rain water, sea water and more.