What is the principle of TOC analyzer?
TOC refers to a Total Organic Carbon analyzer, which utilizes a catalytic oxidation combustion technique at high temperature (the temperature raises up to 720 ºC), to convert organic carbon into CO2. The CO2 generated by oxidation is measured with a Non-dispersive Infra-Red (NDIR) sensor.
What is a TOC machine?
A total organic carbon analyzer (also referred to as TOC analyzers) measures the amount of total organic carbon present in a liquid or water sample. Since all total organic carbon analyzers only measure total carbon, a TOC analyzer always requires some accounting for the inorganic carbon (IC) that is always present.
What is total organic carbon in water?
Total organic carbon is a measure of the amount of organic compounds contained in a water sample. Organic carbon-containing compounds can either be dissolved in water or exist in water as undissolved, suspended material, or liquid. This organic matter can enter water naturally and through man-made sources/processes.
What is NPOC in TOC?
NPOC stands for non-purgeable organic carbon. When a sample contains little to no purgeable organic carbon or volatile organic carbon (VOC), the BioTector can be specified to measure TOC as NPOC.
Which catalyst is used in TOC?
platinum catalyst
TOC (Total Organic Carbon) Measurement The 680°C combustion catalytic oxidation method achieves total combustion of samples by heating them to 680°C in an oxygen-rich environment inside TC combustion tubes filled with a platinum catalyst.
What is the purpose of TOC?
TOC is the measure of the level of organic molecules or contaminants in purified water. TOC is an analytic technique that helps organizations understand whether the water they are using is pure enough for their processes. All water, no matter how pure, contains some carbon materials.
How do you perform a TOC?
TOC is calculated by subtraction of the IC value from the TC of the sample. Another variant employs acidification of the sample to evolve carbon dioxide and measuring it as inorganic carbon (IC), then oxidizing and measuring the remaining non-purgeable organic carbon (NPOC). This is called TIC-NPOC analysis.
How does TOC affect water quality?
However, TOC provides a more direct expression of the organic chemical content of water than BOD or COD. Environmental Impact: By using TOC measurements, the number of carbon-containing compounds in a source can be determined. The larger the carbon or organic content, the more oxygen is consumed.
Why is TOC important in water?
How do you convert TOC to Doc?
Foc is the Fraction of Organic Carbon in a soil, which is simply its Total Organic Carbon content expressed as a decimal fraction (e.g. 1.0% TOC = 0.010 Foc).
How does Shimadzu TOC work?
By sparging samples to which a small amount of acid has been added, the IC in the sample is converted to carbon dioxide. This carbon dioxide is removed, and the TOC is obtained by measuring the TC in the treated sample. When the carbon dioxide from the IC is removed, POC (purgeable organic carbon) may also be lost.
What is the difference between TOC L and TOC V?
The TOC-L series of TOC analyzers adopts the 680°C combustion catalytic oxidation method, which was developed by Shimadzu and is now used worldwide. TOC-V wet type series have a high-sensitivity NDIR which achieves ultrahigh sensitivity measurements.
What is TOC-vcsh?
The On-line TOC-VCSH can be used for Continuous automatic high-sensitivity monitoring of water samples such as pure water and tap water. Demands for highly purified water and its quality control are getting stronger in many industries, such as pharmaceutical, medical device, food/beverage, chemical, precision machinery, and semiconductor.
Does the on-line TOC-V CSH require any special draining operations?
No special draining operations are needed. The On-line TOC-V CSH incorporates software for automatically performing tests specified by Japanese Pharmacopoeia (resolution test) and USP (system suitability test). Combining the On-line TOC-V CSH with an OCT-1 (optional) enables fully automatic testing; setting the reagent is all that is required.
Why choose Shimadzu ETOC?
Demands for highly purified water and its quality control are getting stronger in many industries, such as pharmaceutical, medical device, food/beverage, chemical, precision machinery, and semiconductor. Shimadzu’s eTOC has been designed to satisfy this demand.