Fusion UV/Persulfate

The Fusion instrument is meticulously engineered for precise determination of carbon content within various liquid solutions, primarily focusing on water analysis. Employing a secure and established method involving UV-promoted persulfate oxidation of carbonaceous substances, the Fusion effectively converts these compounds into carbon dioxide (CO2). Subsequently, it employs Non-Dispersive Infrared (NDIR) technology for the accurate detection of the produced CO2, ensuring its sensitivity spans from an impressive 0.2 parts per billion carbon (ppbC) to 4,000 parts per million carbon (ppmC).


The Fusion is a meticulously crafted instrument tailored for the precise determination of carbon content in diverse liquid solutions, with a primary focus on water analysis. Its operation hinges on a secure and established methodology that harnesses UV-promoted persulfate oxidation to convert carbonaceous materials into carbon dioxide (CO2). The Fusion’s exceptional sensitivity spans an impressive range, from 0.2 parts per billion carbon (ppbC) to 4,000 parts per million carbon (ppmC). What truly sets it apart is its capacity to differentiate between various carbon forms through the selection of predefined instrument methods.

The instrument offers four distinct modes of carbon analysis:

  1. Total Carbon (TC): This mode quantifies all carbon, whether organic or inorganic, present in the sample.
  2. Inorganic Carbon (IC): It specifically determines the inorganic carbon content within the sample.
  3. Total Organic Carbon (TOC): TOC analysis calculates the total organic carbon content by subtracting IC from TC.
  4. Non-Purgeable Organic Carbon (NPOC): NPOC, also known as TOC by sparging, employs a specialized process involving precise sample and reagent transfer for accurate measurement.

For TOC determination using the NPOC method, the Fusion employs a sophisticated setup, including a syringe driver and a 7-port valve. This ensures the precise transfer of samples and reagents to the reactor. The process involves a sequential transfer of the resulting CO2 from the sample to either vent or the NDIR detector. This sequence unfolds meticulously:

  1. IC and POC Removal: Initially, IC and POC are removed through acidification and sparging within the IC sparger.
  2. UV Reactor Oxidation: Following IC removal, a portion of the sparged sample is transferred to the UV reactor. Here, persulfate reagent is introduced to facilitate the oxidation of organic carbon. This oxidation proceeds through a series of chemical reactions, including the formation of free radical oxidants, excitation of organics, and their subsequent oxidation.
  3. NDIR Detection: The oxidation products generated in Step 2 are efficiently channeled into the CO2-selective NDIR detector.

A critical aspect of this process is the closure of the exit valve from the NDIR, allowing the detector to pressurize. Once the gases within the detector reach equilibrium, a precise analysis of CO2 concentration ensues. This pressurization, termed Static Pressure Concentration, significantly enhances sensitivity and precision. It facilitates the measurement of all oxidation products within the sample during a single reading, setting it apart from conventional flow-through technology. The resulting output signal is directly proportional to the concentration of CO2 resulting from sample oxidation.


The Fusion instrument boasts a wide array of applications owing to its capability to accurately determine carbon content in various liquid solutions. Its versatility extends to the following areas:

  1. Environmental Analysis: The Fusion is an invaluable tool for environmental scientists and researchers. It enables the quantification of carbon content in water samples, aiding in the monitoring and assessment of environmental impact and water quality.
  2. Industrial Quality Control: Industries reliant on precise carbon content measurements, such as pharmaceuticals and beverage production, benefit from the Fusion’s ability to ensure product quality and compliance with regulatory standards.
  3. Research and Development: Scientists and laboratories engaged in diverse research areas, including chemistry, biology, and geology, find the Fusion indispensable for conducting experiments and investigations that require accurate carbon analysis.
  4. Water Treatment: Water treatment facilities rely on the Fusion to assess the efficiency of purification processes by tracking carbon content in treated water.
  5. Wastewater Management: The instrument aids in evaluating the organic carbon content in wastewater, a critical parameter for wastewater treatment plant operations and environmental impact assessments.
  • EPA 415.1- 415.3, 9060A,
  • Standard Method 5310C, ASTM D4779 and D4839,
  • prENV 13370,
  • Cleaning Validation / USP TOC Method <643> / EP 2.2.44 / JP


Sample typeAqueous, Pharmaceutical and Environmental
TechniquePhotochemical Oxidation via UV-Persulfate followed by Nondispersive Infrared (NDIR) with Static Pressure Concentration (SPC)
Detection limits0.2 μg/L
Dynamic Range0,2 μg/L to 4000 mg/L
Carryover and Precision1,0% Cross Contamination and 1,0% RSD, ±2 μg/L or 0,02 μgC
Integrated autosampler75x 40mL positions autosampler
Common MethodsEPA 415.1, EPA 415.3, EPA 9060A, Standard Method 5310C, ASTM D4779, ASTM D4839, prENV 13370, Cleaning Validation / USP TOC Method <646> / EP 2.2.44 / JP
DimensionsHeight: 81,3 cm
Width: 45,7 cm
Depth: 62,2 cm
Gas Requirements99,99% N2 cylinder or 99,9% N2 generator at 65 to 100 psi
Communication InterfaceUSB/RS-232 or Ethernet
Power Requirements100-240 VAC ±10%, 50/60 Hz
Minimum Computer RequirementsMicrosoft Windows 7 or higher, one free USB/RS-232/Ethernet port
Warranty12 months limited

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