SUEZ Water - Water Technologies & Water

Sievers TOC Analyzers & Analytical Instruments

Unmatched analytical performance, reliability, and ease of use

As the world’s leading manufacturer of total organic carbon (TOC) analyzers and analytical instruments, we provide superior technology, design, quality, and service. We have acquired more than 30 patents for technical innovations— including the Sievers Membrane Conductometric Method and the Integrated On-Line Sampling (iOS) System. Sievers TOC Analyzers cover a dynamic analytical range from 0.03 ppb up to 50,000 ppm and provide solutions across diverse industries and applications. Beyond instrumentation you can trust, Sievers certified services, reference materials and vials, and application expertise are unmatched.

Sievers TOC Analyzers & Analytical Instruments

Unmatched analytical performance, reliability, and ease of use

As the world’s leading manufacturer of total organic carbon (TOC) analyzers and analytical instruments, we provide superior technology, design, quality, and service. We have acquired more than 30 patents for technical innovations— including the Sievers Membrane Conductometric Method and the Integrated On-Line Sampling (iOS) System. Sievers TOC Analyzers cover a dynamic analytical range from 0.03 ppb up to 50,000 ppm and provide solutions across diverse industries and applications. Beyond instrumentation you can trust, Sievers certified services, reference materials and vials, and application expertise are unmatched.

What is a TOC Analyzer?

Total Organic Carbon (TOC) analyzers perform two functions: they oxidize the organic carbon in a sample to COand measure the COproduced. What makes TOC analyzers different is the method they use to oxidize the organics and the methods used to detect the resulting CO2.

The three main methods of COdetection used commercially are:

  1. Non-dispersive infrared (NDIR)
  2. Direct Conductometric (Non-selective Conductometric)
  3. Membrane Conductometric Detection (Selective Conductometric)

NDIR TOC detectors measure CO2 in the gaseous phase, while conductometric TOC detectors measure CO2 in the liquid phase.

What does TOC measure?

Total Organic Carbon (TOC) is an indirect measure of organic molecules present in a sample and measured as carbon. TOC measurement includes oxidizing organic carbon, detecting the oxidized carbon (ofter detected as CO2 by conductivity or NDIR), and expressing the result as carbon concentration.

How is TOC calculated?

TOC is calculated as the difference between total carbon (TC) and inorganic carbon (IC) in a sample.

TOC = TC-IC

This is often done by measuring total carbon, oxidizing organic carbon into CO2 and then detecting COwith conductivity or NDIR.

Explore the Spectrum of TOC Analyzers

Click image to enlarge.

Sievers-TOC-Analyzer-Spectrum

Sievers-TOC-Analyzer-Spectrum