TOC Analyzer for Clean and Pure Water

LAR's QuickTOCuv is an online analyzer for the determination of total organic carbon (TOC) and the dissolved organic carbon (DOC) in pure, drinking, surface and waste water.


Features & Benefits

  • Measurement range: 0,1 - 1,0 mg/l, 0,5 - 10 mg/l, 1 - 50 mg/l, 10 - 100 mg/l, 50 - 500 mg/l, 100 - 1,000 mg/l
  • Recognized UV persulphate method
  • Continuous determination of TOC, TC, NPOC, DOC
  • Accuracy of +/- 2 %
  • Auto-calibration
  • Automatic system check (zero point correction, sensitivity)
  • Reduced consumption of chemicals
  • Certified housing for EX zones (EX p) (options for ATEX, IECEx, etc.)
  • Analyser availability of minim. 98%
  • Maintenance and service max. 15 minutes/ week
  • Very low operating and maintenance costs
TOC analyser QuickTOCuv

LAR's total organic carbon analyzer is suitable for a variety of applications and types of water:

Using analyzer options, the measurement system is adaptable for every measurement challenge.

For safe operation in hazardous areas, there are different protection housings available:

  • IP54 (Standard)
  • NEMA 4X
  • ATEX Zone I
  • ATEX Zone II
  • IECEx

Continuous TOC determination. Using the UV persulphate method.

QuickTOCuv is an online measuring system that determines the parameters TC and TOC using the UV persuphate method. In addition, different versions of the measuring device can be supplied and it can thus also be used in Ex zones. TOC determination is carried out in accordance with the standards DIN EN 1484:1997 and US-EPA 415.2.

The procedure. Achieving the goal in three steps.

First the sample is acidified with a weak acid in a so-called stripping vessel and purged with air. At a pH level of 2, the inorganic content is removed from the sample in the form of CO2 , which is channeled off. The sample only contains NPOC at the end of the procedure. In the next step, the sample stream is fed constantly into the UV reactor together with the digestion reagent (sodium persulphate) and the carrier gas. Exposed to the ultraviolet light, the organic carbon is converted into CO2 by the hydroxyl radicals that have been produced. The reaction product is then dried using a separation vessel and a specific drying membrane and is fed into the NDIR detector to quantify CO2 content.

The reactor. High resistance to wear and tear.

The reactor forms the heart of the QuickTOCuv as this is where UV oxidation takes place. A special external tube protects the user from hazardous UV rays. In addition, an internal tube made of quartz glass protects the UV lamp from direct contact with the sample. This allows us to guarantee safe operation for over 2 years.

Operations and maintenance. Simple and fast.

The standard chemicals required for operation in TOC mode are reduced to a minimum. All servicing tasks are easy and simple to carry out due to compact and functional construction of the measuring device. At a glance, the user is informed about current operating status thanks to the large glass door. The result: very low maintanance requirements with high uptime levels of >98%.

The measuring technology. Reliable.

The QuickTOCuv process controls have been optimised in all areas. Additional sensors and carrier gas preparation are optional. Reliable operation is guaranteed by the separation of the analytical compartment from the electronics and by the use of high-quality materials.

System checks. Automatic.

QuickTOCuv automatically carries out regular checks to assess correct function of NDIR detector by zero point correction and sensitivity tests. This ensures that any deviations are rapidly detected and guarantees precise results.

The TOC is one of the most important composite parameters in the assessment of the organic pollution of water.

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Total Organic Carbon analysers are commonly used to measure the level of organic contamination in water. Online TOC analysers installed in refineries and petrochemical plants are located right in the middle of the process facilities.


The QuickTOCuv of LAR Process Analysers AG is a continuous operating online analyzer for the determination of total organic carbon (TOC) and total carbon (TC) in water.