1、 Definition and purpose

The Total Organic Carbon Analyzer (TOC analyzer) evaluates the total amount of organic pollutants in water, soil, pharmaceutical water, pharmaceutical raw materials, and chemical products by measuring the content of organic carbon in the sample. This indicator has important application value in multiple fields such as environmental monitoring, pharmaceuticals, and chemical engineering.

2、 Working principle

The working principle of the total organic carbon analyzer is mainly based on the process of converting organic matter into carbon dioxide (CO2) under specific conditions, and then indirectly determining the content of total organic carbon in water samples by detecting the amount of CO2 generated. Specifically, there are several commonly used detection methods:

Combustion oxidation method: Organic carbon in the sample is burned and oxidized to CO2 at high temperature, and then the concentration of CO2 is detected by non dispersive infrared absorption spectroscopy technology to calculate the content of organic carbon in the sample. This method is applicable to various types of water and soil samples.

UV oxidation method: Using ultraviolet light to irradiate the sample, organic carbon is decomposed and oxidized into CO2, and then the CO2 content is detected by non dispersive infrared absorption method. This method may not be applicable for certain specific types of samples, such as those containing high levels of particulate organic matter, drugs, or proteins.

Conductivity detection method: Organic carbon is converted into CO2 and inorganic ions by an oxidant, causing a change in the conductivity of the water sample. By measuring the change in conductivity, the content of organic carbon can be indirectly calculated. This method has the advantages of fast measurement speed and good stability.

3、 Application Fields

Total organic carbon analyzer has a wide range of applications in multiple fields, including but not limited to:

Environmental monitoring: used to monitor the degree of organic pollution in surface water, groundwater, seawater and other water bodies, and evaluate the environmental quality of water bodies.

Pharmaceutical industry: In the pharmaceutical process, strict monitoring is carried out on the organic carbon content of purified water, injection water and other pharmaceutical water to ensure the quality and safety of drugs.

Chemical industry: In the chemical production process, it is necessary to monitor the organic carbon content of materials in each link to optimize production processes and reduce environmental pollution.

Agriculture and Soil Science: Used to assess the content of organic carbon in soil, understand soil fertility and ecological functions.

4、 Precautions

When using a total organic carbon analyzer, the following precautions should be taken to ensure the accuracy of measurement results and the long-term stable operation of the instrument:

Instrument preparation: Check whether the appearance, display screen, and buttons of the instrument are intact to ensure that the instrument is in normal working condition.

Preheating and Calibration: Preheat and calibrate according to the requirements of the instrument manual to ensure the accuracy of the measurement results.

Sample processing: Proper pre-treatment of the sample, such as filtration, dilution, etc., is carried out to remove possible interfering substances and ensure that the sample meets the measurement range and requirements of the instrument.

Operation process: During the operation, pay attention to avoiding direct sunlight and maintaining a suitable ambient temperature. Set the measurement parameters according to the requirements of the instrument manual and inject the sample.

Maintenance: Regularly clean and maintain the instrument, including replacing vulnerable parts, checking the service life of ultraviolet lamps, etc., to ensure the long-term stable operation of the instrument.

In summary, the total organic carbon analyzer is an important tool for environmental monitoring and quality control, playing a crucial role in multiple fields. By selecting and using this instrument reasonably, accurate determination and effective monitoring of organic carbon content in samples can be achieved.