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Sievers TOC 800 User Manual

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Ionics Instruments 2004 Page 3-10 DLM 30007-08 Rev. A
Major Accessories and Configurations Available for the Analyzer
IC Removal Module
For water samples containing high levels of inorganic carbon (IC) compared to
the TOC levels such as some municipal water systems, groundwater supplies,
and RO permeates, improved accuracy in TOC measurements can be
achieved by removing most of the IC prior to TOC measurement. The Sievers
IC Removal Module consists of a vacuum degassing module, a vacuum pump,
and an activated carbon and soda lime trap. In operation, the water sample is
introduced into the analyzer, acid, and if necessary persulfate oxidizer, is
added to the sample as usual. Then the stream is directed through the
vacuum-degassing module. Carbon dioxide produced from the reaction of
bicarbonate and carbonate with acid is removed from the sample stream by
the vacuum. The sample is then directed by the stream splitter for
measurement of IC and TC. Approximately 99% of the IC is removed at
concentrations up to 25 ppm. The activated carbon/soda lime trap prevents
contamination of the sample stream from organic compounds and CO
2
in the
atmosphere.
Typically, if the TOC is 10% or less of the IC concentration, the Sievers
Inorganic Carbon Removal Module will be required. For example, if the IC is 1
ppm, then use the IC Removal Module if the TOC is 100 ppb or less for
accurate TOC measurements. The analyzer will calculate the TOC/IC ratio for
each measurement and if this ratio is less than 0.1, a warning message will be
displayed on the LCD screen and written to the Error Stack.
Autosampler
The TOC Autosampler System consists of:
Autosampler
Computer with Sievers DataPro Autosampler Software
Sievers 800 Series TOC Analyzer
Printer (optional)

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Sievers TOC 800 Specifications

General IconGeneral
BrandSievers
ModelTOC 800
CategoryMeasuring Instruments
LanguageEnglish

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