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TOC Analyzers

A mainstay of environmental and quality control chemistry, TOC analyzers measure the carbon content of dissolved and particulate organic materials in water.

by Other Author

A mainstay of environmental and quality control chemistry, TOC analyzers measure the carbon content of dissolved and particulate organic materials in water. The carbon measured may arise from any combination of living or dead organisms and chemical contamination. TOC often serves as a surrogate for more difficult measurements, for example, contamination from petrochemicals, solvents, pharmaceuticals, chlorinated industrial chemicals and pesticides. It can also act as a screen for additional analysis.

Top 5 Questions You Should Ask When Buying a TOC Analyzer

1. Is the TOC technology suitable for your specific application or water conditions? Many TOC technologies may be suitable only for waters with a narrow range of organic or inorganic contaminants.

2. Are different models available to meet your current and future sampling needs (i.e. online, portable, laboratory)? Do these models use similar technology to simplify method transfer or data comparability from lab to online?

3. Does the company offer the documentation and support necessary to help meet applicable industry or government regulations?

4. What is the company’s level of experience supporting sales of TOC analyzers in your specific industry? Do they understand the unique challenges specific to your application?

5. What type of service, applications, and technical support are available during and after the purchasing process?

Primary purpose for TOC analyzers in our readers’ labs, based on our latest survey:

Research 29%
Quality control 34%
Clinical 1%
Processing 10%
Other 27%

Types of TOC analyzers respondents are using in their labs:

Benchtop 75%
Portable 11%
Online 13%
Other 1%

Our readers’ primary reasons for purchasing a TOC analyzer:

Replacement of an aging TOC analyzer 31%
Addition to existing systems; increase capacity 29%
First-time purchase 19%
Setting up a new lab 16%
Other 5%

Top ten factors/features that most influence the decision making process when buying a TOC analyzer:

Reliability 87%
Accuracy 87%
Ease of Use 84%
Low maintenance/easy to clean 83%
Low operating cost 80%
Service and support 79%
Price 71%
Warranty 60%
Speed 56%
Ease of installation 50%

Recently Released TOC Analyzers

Sievers InnovOx
• Achieves superior TOC recoveries regardless of organic compounds and particulate impurities in the sample
• New enhancements include faster, more intuitive navigation; additional user-managed security options; and conversion factors for reporting units like BOD or COD
• A new repeat criteria option improves calibration or grab sample speed

GE Analytical Instruments

• Provides maximum uptime and reliability due to a patented self-cleaning oxidation technology that easily handles difficult samples and significantly reduces maintenance
• Eliminates build up issues from salts, particulates, fats, oils and greases that lead to drift and high maintenance
• Offers reliable, continuous monitoring and real-time process control


• Opens up new frontiers in the field of materials characterization
• Ultra-high heating and cooling rates add a new dimension to the study of thermally induced physical transitions and chemical processes
• Enables users to investigate effects that were previously impossible to measure
• Features Fast response sensor and wide temperature range


Multi N/C® 2100/2100 S
• Equipped with an excellent injection technique for particle containing samples
• Includes VITA®, the FR NDIR detector and catalytic high temperature combustion up to 950°C
• Provides sample feed by valve- and septum-free direct injection
• Upgradeable for simultaneous determination of TNb (ChD oer CLD)
• Features auto-protection

Analytik Jena


TOC Manufacturers

Analytik Jena
EST Analytical
GE Analytical Instruments
Mettler Toledo
OI Analytical
Parker Balston
Skalar Analytical
Thermo Fisher Scientific
TOC Systems