Total Organic Carton (TOC) standard is a kind of reference substance used in quantitative TOC analysis. Potassium hydrogen phthalate is a common organic carbon standard. In practical use, an appropriate amount of dried potassium hydrogen phthalate is taken and diluted with water to obtain a standard solution of a certain concentration, which is called the organic carbon standard solution.
The standard solutions are diluted step by step into organic carbon standard series solutions of different concentrations, and injected into combustion tube and reaction tube respectively. The height of absorption peak on the recorder can be measured, and the corresponding concentration is plotted to draw the calibration curve. The calibration curve obtained from the TOC standards is an important basis in the quantitative analysis of TOC.
Application fields
Environmental analysis: With the fast analysis speed, analysis method using TOC standards is very suitable for environmental analysis, so that remedial measures can be taken as soon as possible. TOC standards can be used in urban water quality monitoring, factory waste water monitoring, atmospheric carbon dioxide monitoring, soil testing, seawater analysis, drinking water TOC monitoring and others. For example, TOC standards can be used to monitor trihalomethanes quickly and easily to ensure the safety of drinking water. In addition, TOC standards can be used to monitor microorganisms in water samples, such as coliforms, Escherichia coli and others.
Pharmaceutical industry: The pharmaceutical industry has high requirements for the cleanliness of pharmaceutical water and equipment, and TOC standards can be used to confirm the eligibility. By using TOC standards to determine the carbon content of pharmaceutical water, organic molecules and microbial pollutants in pharmaceutical water can be analyzed indirectly. In addition, the manufacturer must ensure the quality and safety of the product by ensuring the cleanliness of the equipment. TOC standards can be used in daily analysis quickly and easily.
Electronics industry: TOC standards play important roles in the analysis of water quality in the electronics industry. First, TOC standards can be used to detect the recovered water and prevent the polishing machine from overloading. Second, TOC standards can be used to detect the organic impurities in etching solution and monitor the degradation of product performance. Third, the TOC standards can also be used to check the ultrapure water used in wafer production to ensure water quality. Fourth, TOC standards can monitor the quality of organic additives in electroplating solution and ensure the quality of printed circuit board.
Others: In addition to the above fields, TOC standards are also be widely used in other fields, including power plants, chemical and petroleum industries and others. For example, in the chemical and petroleum industries, TOC standards can be used to detect the spillage of organic matter in cooling water and equipment condensation backflows.
Why choose Alfa Chemistry?
Alfa Chemistry is one of the largest providers of TOC standards in the world and the quality assurance is of prime importance to Alfa Chemistry. The solvent from Alfa Chemistry in the world is synonymous with reliability and excellent quality. Because of the exacting nature of our business and the regulatory demands placed upon our industry, Alfa Chemistry continues to be at the forefront in terms of compliance, accreditations and certifications.
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