We are the sales and service partner for the Sievers TOC sensors and analyzers in Finland, Norway, Sweden and Denmark (Scandinavia).
An Important Measure for Water Analysis and Quality Control
Total Organic Carbon (TOC) is an important measurement for quality control of water and especially Ultra Pure Water (UPW) and water for pharmaceutical use.
The level of TOC indicates the amount of organic material present in water, but is it not specific enough to determine the source. TOC is often measured in a range from 0.5 ppb (parts-per-billion) to 50 ppm (parts-per-million).
Deciding Between a TOC Analyzer and a Sensor
It is important for you to select the right measuring device for your intended application. Sensors are less accurate than analyzers and are typically used to monitor a process. The data collected from a sensor is used for information only. Analyzers, on the other hand, are suited to manage a process and the data from the analyzer can be used to make critical quality decisions. However, both TOC analyzers and sensors serve an important role in UPW applications.
TOC Analyzer and Sensor Technologies
TOC Sensors measure the CO2 directly by conductivity cells (Direct Conductivity, or DC method), which can produce false positive and false negative TOC results. In contrast, Sievers TOC Analyzers remove the CO2 by diffusion through a selective membrane into deionized (DI) water and then measure the ionized CO2 by a conductivity cell using the Membrane-Conductometric (MC) method.
The Sievers Membrane Conductometric Method Delivers Unmatched Detection
The Sievers Membrane Conductometric Detection method is a very reliable technique for measuring Total Organic Carbon (TOC). Compared to instruments using NDIR (non-dispersive infrared) detection, the conductometric detection method exhibits a particularly stable calibration, which is not prone to significant drift over time. This means less frequent calibration with no compromise in analytical performance.
There are two types of conductometric detectors; Direct Conductometric and Membrane (or Selective) Conductometric. Both types have stable calibration and high sensitivity. The main difference is that the direct detector is susceptible to interference from ionic contamination, acids, bases, and halogenated organics.
The Sievers membrane technology utilizes a gas-permeable membrane that selectively passes only the CO2 produced from the oxidation of organics. Because the membrane prevents contaminations to interfere with the CO2 measurement, the Membrane Conductometric method delivers unrivaled sensitivity, selectivity, stability, accuracy, and precision.
Portable, On-Line and Laboratory TOC Measurements
The Sievers analyzers come in different series. The newer M9 generation TOC Analyzers also comes in three different versions.
The M9 Portable has a lightweight and compact design which can be hand-carried anywhere. The Portable can be used for discrete grab samples, for automated analysis with the optional Sievers Autosampler or On-Line. Furthermore it is designed for at-line cleaning validation applications.
The M9 On-Line is used for continuous monitoring with the ability to introduce discrete grab samples and standards. The broad, linear TOC range allows for excellent low-level sensitivity for ultra pure water analysis as well as high-level capability for cleaning validation or other challenging water samples.
The M9 Laboratory measures discrete grab samples via sample vials and sipper tubes or to automate high-volume sample analysis using the Sievers Autosampler. The Laboratory is well suited for analysis of a variety of sample matrices and concentrations.
The M9 Meets Stringent Regulatory Requirements
The M9 TOC Analyzers are engineered to meet stringent regulatory requirements:
- US Pharmacopeia (USP) <643> and <645>
- European Pharmacopeia (EP) 2.2.44 Total Organic Carbon
- Indian Pharmacopeia (IP) 2.4.30
- Chinese Pharmacopeia (CP) Appendix VIII R
- Japanese Pharmacopeia (JP16) 2.59 monographs for Purified Water and Water For Injection
Sievers TOC Analyzers and Applications
For more information about the different versions of TOC Analyzers and Sensors, and their application, please click on this link. You can also find more information in the brochures in the document section as well as SUEZ’s homepage.
TOC (Total Organic Carbon) Analyzers Maintenance and Support
As a SUEZ service partner all our Service Engineers has undergone SUEZ Analytical’s instrument training in performing calibration, replacement of consumables and maintenance of instruments.
If you sign a service contract we will make sure that your instrument is in perfect working condition. The contract includes yearly maintenance with replacement of consumables and a calibration with certificate (for validation purposes) as well as a service report with recommendations. The agreement also includes telephone diagnostics.
If you want to know more about the TOC instruments and our services please contact our TOC expert.