2017 TOC Analyzers Survey Results

Accuracy and performance of results are the top most sought-after features in a TOC analyzer, according to our most recent survey results.

Erica Tennenhouse

Total organic carbon (TOC) analyzers are a mainstay of environmental and quality control chemistry. TOC, a crucial metric in many processes, may arise from a combination of living or dead organisms or chemical contamination. Its measurement can serve as a surrogate for more difficult measurements or a screen for further 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? 

Types of TOC analyzers used by survey respondents:

Benchtop 89%
Portable 12%
Online 8%
Other 1%

Methods used by survey respondents to detect CO2:

Non-Dispersive Infrared (NDIR) 56%
Direct Conductometric (Non-Selective Conductometric) 25%
Membrane Conductometric Detection (Selective Conductometric) 16%
Other 14%

Nearly 47% of respondents are engaged in purchasing a new TOC analyzer. The reasons for these purchases are as follows:

Replacement of an aging system
Addition to existing systems, increase capacity
First time purchase
Setting up a new lab

Top 10 features/factors respondents look for when purchasing a TOC Analyzer:

Accuracy and performance of results 88%
Ease of use 77%
Low maintenance costs 65%
Continuous analysis and rapid display updates 49%
Ease of installation 47%
Easy access to UV lamp with diagnostics and lamp expiration alarm 37%
Automated self-diagnostic tools 35%
Energy efficiency 32%
Automatic diluting capabilities from stock standards or samples 28%
No gases or reagents to handle 24%

For more information on TOC analyzers, including useful articles and a list of manufacturers, visit

See the most recent survey results here