RA-7000A
Automated Mercury Analysis with Seamless Automation from Start to Finish by RA-7000A with SANPRA™
Built for water analysis established method workflows (USEPA 245.1, 245.2, 7470A, JIS K0102, APHA 3112B, EN 1483 ISO 12846, HJ 597 and more), integrating oxidation, reduction, mercury vapor generation, and CVAAS measurement into a single controlled system.
Supports both Permanganate (KMnO₄) and Bromine (KBr-KBrO₃) oxidation workflows within one platform.
RA-7000A
Fully Automated Mercury Analyzer
From oxidation to detection — one seamless system with SANPRA™. Supports KMnO₄ and KBrO3-KBr workflows.
About the RA-7000A
About the RA-7000A
The RA-7000A is a mercury analyzer based on Cold Vapor Atomic Absorption Spectrophotometry (CVAAS), designed for reliable mercury determination in environmental and laboratory applications.
It supports method-based workflows for water analysis, enabling consistent and controlled measurement across routine and trace-level samples.
Suitable for a wide variety of post-digested sample solutions and aqueous samples, including:
- Drinking Water
- industrial wastewater
- River Water
- lake water
- seawater
- rain-runoff
River Water
industrial wastewater
drinking water
rain-runoff
seawater
lake water
Methods
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
0.5ppt Detection Limit
Trace level detection limit down to 0.5ppt or 5ppt with chemical pre-treatment
Precision, Automation, and Reliability in Mercury Analysis
Discrete Direct Purge (DDP)
Reducing Vaporization
Discrete Direct Purge (DDP)
Reducing Vaporization
Discrete-Direct-Purge (DDP) Reducing Vaporization
NIC’s Discrete-Direct-Purge (DDP) technique measures mercury by processing each sample in its own sealed tube, preventing contact between samples and minimizing contamination. After reductant (SnCl₂) is added, mercury in the acid-digested sample is converted to elemental vapor (Hg⁰). A carrier gas then purges the mercury vapor directly from the sample tube to the detector for measurement.
Because only mercury vapor enters the flow path, sample carryover and memory effects are virtually eliminated, even after high-concentration samples.
Benefits
- Excellent Repeatability & Precision
- Minimal sample-to-sample carryover
- Reduced risk from over-range samples
- Lower reagent use
- Lower reagent waste
Discrete-Direct-Purge (DDP) Reducing Vaporization
NIC’s Discrete-Direct-Purge (DDP) technique measures mercury by processing each sample in its own sealed tube, preventing contact between samples and minimizing contamination. After reductant (SnCl₂) is added, mercury in the acid-digested sample is converted to elemental vapor (Hg⁰). A carrier gas then purges the mercury vapor directly from the sample tube to the detector for measurement.
Because only mercury vapor enters the flow path, sample carryover and memory effects are virtually eliminated, even after high-concentration samples.
Benefits
- Excellent Repeatability & Precision
- Minimal sample-to-sample carryover
- Reduced risk from over-range samples
- Lower reagent use
- Lower reagent waste
Discrete-Direct-Purge (DDP) Reducing Vaporization
NIC’s Discrete-Direct-Purge (DDP) technique measures mercury by processing each sample in its own sealed tube, preventing contact between samples and minimizing contamination. After reductant (SnCl₂) is added, mercury in the acid-digested sample is converted to elemental vapor (Hg⁰). A carrier gas then purges the mercury vapor directly from the sample tube to the detector for measurement.
Because only mercury vapor enters the flow path, sample carryover and memory effects are virtually eliminated, even after high-concentration samples.
Benefits
- Excellent Repeatability & Precision
- Minimal sample-to-sample carryover
- Reduced risk from over-range samples
- Lower reagent use
- Lower reagent waste
The RA-7000A, when paired with the SANPRA autosampler, enables fully automated permanganate oxidation digestion for total mercury analysis. The system automatically adds H₂SO₄, HNO₃, KMnO₄, and K₂S₂O₈, followed by controlled heating at 95 °C to oxidize all mercury species into ionic mercury. After digestion and cooling, excess oxidant is neutralized and the mercury is reduced to elemental vapor (Hg⁰) for measurement by the RA-7000A CVAAS detector. This workflow supports regulatory procedures such as EPA Method 245.1, EPA Method 7470A, ASTM D3223, and APHA 3112B, ensuring consistent digestion and reliable results.
The RA-7000A also supports bromine oxidation digestion, where mercury species are oxidized using bromine generated from KBr–KBrO₃ in acidic conditions. After oxidation, mercury is reduced to elemental vapor (Hg⁰) using SnCl₂ and measured by the RA-7000A CVAAS detector. This workflow supports bromine-based procedures such as ISO 12846 and HJ 597, providing reliable detection for laboratories following these standard methods.
Fully Automated Permanganate
(KMnO₄)-Oxidation based Method Workflow
Fully Automated Permanganate (KMnO₄)-Oxidation based Method Workflow
The RA-7000A, when paired with the SANPRA™ 5 autosampler, enables fully automated permanganate oxidation digestion for total mercury analysis. The system automatically adds H₂SO₄, HNO₃, KMnO₄, and K₂S₂O₈, followed by controlled heating at 95°C to oxidize all mercury species into ionic mercury. After digestion and cooling, excess oxidant is neutralized by hydroxylamine hydrochloride and the ionic mercury (Hg²⁺) is reduced to elemental vapor (Hg⁰) for measurement by the RA-7000A CVAAS detector. This fully automated workflow supports regulatory procedures such as USEPA Method 245.1, 245.2, 7470A, ASTM D3223, JIS K0102 and APHA 3112B, ensuring consistent digestion and reliable results.
The RA-7000A, when paired with the SANPRA™ 5 autosampler, enables fully automated permanganate oxidation digestion for total mercury analysis.
The system automatically adds H₂SO₄, HNO₃, KMnO₄, and K₂S₂O₈, followed by controlled heating at 95°C to oxidize all mercury species into ionic mercury.
After digestion and cooling, excess oxidant is neutralized by hydroxylamine hydrochloride and the ionic mercury (Hg²⁺) is reduced to elemental vapor (Hg⁰) for measurement by the RA-7000A CVAAS detector.
This fully automated workflow supports regulatory procedures such as USEPA Method 245.1, 245.2, 7470A, ASTM D3223, JIS K0102 and APHA 3112B, ensuring consistent digestion and reliable results.
CVAAS Measurement
SnCl2 Addition
NH2OH · HCl Addition
Cooling
Heating
K2S2O8 Addition
KMnO4 Colour Check
KMnO4 Addition
HNO3 Addition
H2SO4 Addition
K2S2O8 Addition
Potassium Persulfate Addition
KMnO4 Colour Check
LED Indicator Confirmation
KMnO4 Addition
Potassium Permanganate Addition
HNO3 Addition
Nitric Acid Addition
H2SO4 Addition
Sulfuric Acid Addition
Heating
Infrared Heating Digestion
Cooling
Automated Cooling Process
Hydroxylamine Hydrochloride
Stannous Chloride Addition
Measurement
High-Precision Detection
Automated Reagent Dispensing
Precise dispensing of H₂SO₄, HNO₃, KMnO₄, K₂S₂O₈, hydroxylamine hydrochloride, and SnCl₂.
Durable Acid-Resistant Aluminum Block
LED Verification of Excess KMnO₄
LED Verification of
Excess KMnO₄
Infrared Heating Technology
Infrared Heating
Technology
Bromine (KBr-KBrO₃) Oxidation based
Method Workflow
Bromine (KBr-KBrO₃) Oxidation based
Method Workflow
The RA-7000A with SANPRA™ 3 supports bromine oxidation digestion, where mercury species are oxidized using bromine generated from KBr–KBrO₃ in acidic conditions. After oxidation, mercury is reduced to elemental vapor (Hg⁰) using SnCl₂ and measured by the RA-7000A CVAAS detector. This workflow supports bromine-based procedures such as ISO 12846 and HJ 597, providing reliable detection for laboratories following these standard methods.
Modular Configuration
for Method-Based Workflows
Secured,
Upright Waste Tank
1200mL waste tank provided can securely store all acidic waste after measurement.
1 of 4RA-7000A CVAAS Detector
New generation CVAAS detector has an extended measurement range up to 400ppb and detection limit down to 0.5ppt (0.0025ng/5mL)
2 of 4Detachable Reagents Rack
Transport the batch of reagents bottles securely with ergonomic handle designed in the detachable reagent rack. Bring the rack to safer location for reagents refill.
3 of 4SANPRA™ Autosampler
Compatible with SANPRA™ 3, 5, and 7, enabling configuration based on oxidation method and sample type.
Supports both KMnO₄ digestion workflows and Bromine oxidation methods within the same system platform.
4 of 4Modular Configuration
for Method-Based Workflows
1200mL waste tank provided can securely store all acidic waste after measurement. 1 of 4 RA-7000A CVAAS Detector
New generation CVAAS detector has an extended measurement range up to 400ppb and detection limit down to 0.5ppt (0.0025ng/5mL) 2 of 4
Detachable Reagents Rack
Transport the batch of reagents bottles securely with ergonomic handle designed in the detachable reagent rack. Bring the rack to safer location for reagents refill. 3 of 4
SANPRA™ Autosampler
Compatible with SANPRA™ 3, 5, and 7, enabling configuration based on oxidation method and sample type.
Supports both KMnO₄ digestion workflows and Bromine oxidation methods within the same system platform. 4 of 4
3 Types of SANPRA™ Available
3 Types of SANPRA™ Available
SANPRA™ 3
USP
SANPRA™ 5
USP
SANPRA™ 7
USP
3 Types of SANPRA™ Available
SANPRA™ 3
Bromine Oxidation Methods
USP
SANPRA™ 5
Permanganate Methods
USP
SANPRA™ 7
Solid Mercury Analysis
USP
Reduces Environmental Burden,
Time Saving, Lower Operational Cost
Reduces Environmental Burden,
Time Saving, Lower Operational Cost
Reduces Environmental Burden, Time Saving, Lower Operational Cost
Save resources, save energy, less waste
RA-7000A is designed to be more environmentally friendly than its predecessor RA-4000A series. We are committed into reducing the chemical burden left on the environment and improving your productivity at the same time. By gathering all the users’ feedbacks, we have improved the RA-7000A designs and optimize the process to achieve:
About
50%
Reduced Waste Disposal
1200mL → 600mL
Total of
2hr 40mins
Shortened Measurement Time
11 hours 50 Minutes → 8 hours 30 minutes
(comparison between RA-7000A with SANPRATM-5 against RA-4500)
About
30%
Minimized Power Consumption
0.34kg CO₂ reduction per measurement Assuming measurement 3 times/week (150 times a year) 51.6kg CO₂ reduced yearly
RA-7 WIN Software
RA-7 WIN Software
Intuitive & Practical interface with easy-to-understand graphics.
Live Animation
Illustrates the system's status in real-time for effortless monitoring at a glance.
LIMS-Compatible
Seamlessly export CSV files for smooth laboratory data integration and reporting.
Dilution Tabulation
Clear, automated tabulation of sample and standard solutions prevents manual calculation errors.
Multi-Unit Control
Control up to 3 SANPRA™ units simultaneously, or mix and match with an RH Gas Module.
System Log Files
Easy, immediate access to comprehensive system log files for prompt and accurate troubleshooting.
Featured EPA 245.1 QC Validation
Featured EPA 245.1 QC Validation
Laboratory that uses this method is required to operate a formal quality control (QC) program. RA-7WIN Software can perform the stringent requirements of method EPA 245.1 that includes:
Instrument Performance Check
Laboratory Reagent Blank
Laboratory Fortified Blank
Unknown sample
Unknown sample
Laboratory Fortified Matrix
Continuing Calibration Verification
Instrument Performance Check
Method Detection Limit
Featured EPA 245.1 QC Validation
Laboratory that uses this method is required to operate a formal quality control (QC) program. RA-7WIN Software can perform the stringent requirements of method EPA 245.1 that includes:
Instrument Performance Check
Laboratory Reagent Blank
Laboratory Fortified Blank
Unknown sample
Laboratory Fortified Matrix
Continuing Calibration Verification
Instrument Performance Check
Method Detection Limit
Convenient Side Door Handle
To ensure users can safely
open and close the SANPRA™ cover.
Built-in Chamber Lighting
Allows quick sample status checks at a glance. Optional in SANPRA™ 3; available in SANPRA™ 5 & 7.
Intelligent Sample
Tube Existence Sensing
To prevent reagents from dispensing without
a sample tube, creating a safe system for
users to operate.
Wide Opening Frontage
To ensure no obstruction during sample loading/unloading.
Designed for Safe & Easy Operation
Know more about the intelligent design elements that improve safety, accessibility, and ease of use, thoughtfully engineered to support smooth operation, better visibility, and a more user-friendly laboratory experience.
Instrument Performance Check (Blank)
Laboratory Reagent Blank
Instrument Performance Check (After Calibration)
Continuing Calibration Verification
Laboratory Fortified Blank
Laboratory Fortified Matrix
Quality Control Sample
Unknown sample
Linear Dynamic Range
Method Detection Limit
Versatile Configurations.
Flexible As You Want It To Be.
Versatile Configurations.
Flexible As You Want It To Be.
Start using the RA-7000A with a basic unit of your choice. Scale up with SANPRA™, RH Gas Module, or an Impinger Unit only when you need to.
Gas Analysis
RH Gas Module.
Analyze Gaseous Elemental Mercury trapped using a Mercury Collector Tube with the dedicated RH Gas Module.
Basic Setup
Impinger Unit.
RA-7000A paired with a basic impinger unit (5/20/100/250mL).
Scale Capacity. Maximize Productivity.
Configure the RA-7000A with up to three SANPRA™ units simultaneously. Load up to 240 samples per batch using custom combinations to seamlessly enhance your laboratory’s analytical output and overall workflow efficiency.
Expand Testing. Maximize Versatility.
Configure the RA-7000A with the SANPRA™ and RH Gas Module simultaneously. Analyze solid, liquid, and gas samples on a single platform to seamlessly enhance your laboratory’s analytical scope and overall testing capability.
Versatile Configurations.
Flexible As You Want It To Be.
Versatile Configurations.
Flexible As You Want
It To Be.
Start using the RA-7000A with a basic unit of your choice. Scale up with SANPRA™, RH Gas Module, or an Impinger Unit only when you need to.
Gas Analysis
RH Gas Module.
Analyze Gaseous Elemental Mercury trapped using a Mercury Collector Tube with the dedicated RH Gas Module.
Basic Setup
Impinger Unit.
Start your analytical process using the RA-7000A paired with a basic impinger unit (5/20/100/250mL).
Scale Capacity. Maximize Productivity.
Configure the RA-7000A with up to three SANPRA™ units simultaneously. Load up to 240 samples per batch using custom combinations to seamlessly enhance your laboratory’s analytical output and overall workflow efficiency.
Expand Testing. Maximize Versatility.
Configure the RA-7000A with the SANPRA™ and RH Gas Module simultaneously. Analyze solid, liquid, and gas samples on a single platform to seamlessly enhance your laboratory’s analytical scope and overall testing capability.
Start Your Automated Mercury Analysis Today
Start Your Automated Mercury Analysis Today
Discover how the RA-7000A simplifies mercury testing with automated digestion and high-precision detection. Fill in the form to request product information or speak with our experts.
Start Your Automated Mercury Analysis Today
Start Your Automated Mercury Analysis Today
Discover how the RA-7000A simplifies mercury testing with automated digestion and high-precision detection. Fill in the form to request product information or speak with our experts.
RA-7000A Enquiry Form
Please fill out this form to connect with our local distributor.
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