vario TOC cube

TOC/TNb analysis without limitations


The vario TOC cube offers full flexibility and no sample limitations: It can measure TOC, NPOC, TC, TIC, DOC, POC and TNb with the same basic unit. The wide sample range from ultrapure water, industrial wastewater, concentrated salt solutions or solids cannot be met by any other instrument. Furthermore, the vario TOC cube is optimized to deal with stable carbon compounds, such as humic acids or other rather persistent compounds. This always guarantees full recovery of every organic component and an outstanding accuracy.


Highlights of the vario TOC cube

Customizable for your applicational needs

offers the vario TOC cube a wide variety of possible configurations to perfectly meet your demands

Outstanding stable results even in lower ppb range

thanks to highly sensitive IR detectors and a stable, high-performing furnace

Easy & fast analyses

because of the user-friendly instrument concept for daily routine operation

Long lifetime & low running costs

with unique SALTTRAP matrix separation



Customizable for your applicational needs

Based on one very compact basic unit, the vario TOC cube offers a wide variety of possible adjustments to make the instrument perfectly meet your demands. You could choose if you need manual or automatic sample feeding, analysis of liquids or solids as well as determination of TOC only or in addition with TNb. For the TNb analysis, we offer three different detectors that could be used: a two-channel infrared detector (IR) for CO2 and NO, chemiluminescence (CLD) or electrochemical detection (ECD). For TIC analysis in solids, a separate unit can be attached. This allows the most cost-effective and suitable solution for your analytical task.

Outstanding stable measuring results even in lower ppb range

The vario TOC cube combines the established and proven techniques of our organic elemental analyzers with many years’ experience in TOC analysis. The result is an analyzer with an outstanding range for TOC or TNb covering both the ppb level as well as the percent range and even solids analysis with high accuracy and reliability.

Easy and fast analyses for daily routine operation

The vario TOC cube is optimized to significantly simplify the daily routine operation. Clearly arranged, easily accessible system components minimize maintenance efforts. The tool-free maintenance concept ensures a reliably leak tight instrument at any time. The autosampler is optimized for unattended 24/7 operation. Just prepare your samples and start the analysis before you finish your workday and evaluate your analysis results at the next morning. Thus, you can enjoy smooth analyses and confidence in your results.

Long lifetime & low running costs due to SALTTRAP matrix separation

During the combustion of salt-containing samples, the salts crystallize in the combustion tube. If the crystallization occurs directly in the catalyst or on the quartz glass, their lifetime is significantly reduced. The unique SALTTRAP of the vario TOC cube guarantees user-friendly maintenance intervals of the combustion tube and the catalyst even for concentrated salt solutions. This leads to significantly reduced running costs. Depending on the nature of the salt, a slight decrease in crystallization can be achieved by reducing the combustion temperature. However, only SALTTRAP guarantees effective glass corrosion protection because the salts are trapped directly at the point where they melt.

Future-proof thanks to 10 years guarantee

Thanks to the outstanding robustness and longevity of our vario TOC cube, we grant a 10-year guarantee on the high-temperature combustion furnace. Our long-term oriented dedication to technical support guarantees you, that we provide spare parts for a minimum of 10 years. This results in exceptional low total cost of ownership, giving you confidence in return of investment.


Analytical specifications

Analysis method

High-temperature catalytic combustion up to 1,200 °C and CO2-measurement with IR detection for TOC, NPOC, TC, TIC, POC (VOC), DOC. TNb determination simultaneously with ECD, IR or CLD (optional).

Large detection range

From low ppb to percent. Variable sample volume allows also multipoint calibration from a single standard solution with auto-dilution-effect. Extraordinary linearity over the entire calibration range.

Modular concept for liquids and solids analysis

Large choice of automatic sample feeders for liquids and solids, alternatively cost-efficient solutions with manual sample change. Quick and easy exchangeable. Can be upgraded at any time.

SALTTRAP ensures low maintenance for salt-containing samples

The innovative combustion tube concept enables real matrix separation and offers maximum protection of the combustion tube. Leads to long lifetime and low running costs. Designed for analyses of salt-containing samples, particles, or other complicated sample matrices.

Supports validation

Complete qualification documentation for IQ, OQ and PQ according to international regulations.

In accordance with official standards

The vario TOC cube operates in full compliance with all relevant standards for TOC, TC, TIC and TNb in liquid samples such as ISO 20236, ISO 8245, EN 1484, EN 12260, SM 5310B, EPA 415.1, and ASTM D7573. Due to the unique solids option, TOC and TC can also be determined in solids like soil or waste according to EN 15936 and ISO 10694.

Software with high performance and maximum flexibility

Instrument control with a Windows®* standard PC, control and evaluation software with calibration wizard, system suitability test, statistics and advanced math operations, opt. according to 21 CFR part 11. Integrated maintenance software and comprehensive help menu.

Easy, compact, and economical

The unique instrument concept is characterized by easy handling and optimized for low maintenance costs – with high flexibility and analytical performance.


Download: Flyer-vario-TOC-cube-EN