TOC Analyzer TOC Applications from Environmental Analysis to Pharmaceutical Water

Editor: Marc Platthaus

Shimadzu has launched the TOC-L Series of combustion catalytic oxidation total organic carbon analyzers for laboratory applications. Total organic carbon (TOC) analyzers are used to evaluate the total amount of organic matter in water from the amount of carbon it contains.

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The TOC-L Series of combustion catalytic oxidation total organic carbon analyzers for laboratory applications. (Picture: Shimadzu)
The TOC-L Series of combustion catalytic oxidation total organic carbon analyzers for laboratory applications. (Picture: Shimadzu)

TOC analyzers are used in diverse fields, including the management of tap water, effluent, and ultrapure water, management of pharmaceutical water used in drug manufacturing processes, evaluation of cleaning efficiency (cleaning validation), and environmental investigations of river water and soils, for example.

The TOC-L Series from Shimadzu inherits the basic performance of the TOC-V Series, but upgraded components and software expand the range of applications and make operation easier.

Suitable for a wide range of applications

With applications from ultrapure water to environmental water, the worldwide total organic carbon analyzer market is expected to grow by 6 % per annum. For instance, TOC has been adopted as a water control standard for tap water in Japan. The 16th Japanese Pharmacopoeia (planned implementation from April 2011) additionally expands the application range of TOC measurements to include the purity testing of pharmaceutical water, increasing the demand for TOC analyzers in the pharmaceutical industry.

Shimadzu pioneered the development of total organic carbon analyzers using the 680 °C combustion catalytic oxidation method. This method permits the analysis of samples containing high salt concentrations, such as sea water, which used to be hard to measure. Through its continued excellence in accuracy, sensitivity, and functionality, combined with an extensive product range and options, Shimadzu has become the leading manufacturer of TOC analyzers and holds the largest market share. Shimadzu aims to further increase sales of its total carbon analyzers through the launch of the TOC-L Series, which inherits the excellent performance of the previous models but offers a revamped external design, including a color LCD display.

Features of the New Models

The combustion catalytic oxidation method with 680 °C achieves both high organic matter detection capacity and high measurement sensitivity. The ultra wide range from 4 μg/L to 30,000 mg/L permits measurements from purified water to highly-polluted water. The combustion catalytic oxidation method analyzes TOC by burning the sample and using an infrared gas analyzer to detect the carbon dioxide generated from the carbon contained in the organic matter. The high oxidation decomposition capacity permits the efficient detection of insoluble organic matter and covers a wide range from low concentrations to high concentrations.

The color LCD screen enhances the visibility and feel of the instrument. Previous models employed a built-in thermal printer to print the measured data but the new models use general-purpose computer printers (not included). Data saved in the TOC instrument can be transferred to USB memory for easy data management.

When used for eight hours/day, five days/week, the new standby power function reduces power consumption by 36 %( 100 V) and 43 %( 200 V) as compared to the previous series. The instrument width has been reduced approximately 20 %, from 440 mm to 340 mm. In addition, the TN unit, which was previously installed adjacent to the TOC analyzer, is now installed on top to reduce the overall system width by 260 mm.

Options are available to handle a diverse range of applications, including the measurement of small sample volumes and the continuous measurement of sea water and other samples containing high salt concentrations with only simple maintenance.