Total Organic Carbon (TOC) analyzer is an important analytical instrument widely used in various fields such as biology, environmental monitoring, water treatment, pharmaceuticals, and food. The following is a detailed analysis of the total organic carbon analyzer:

1、 Overview

The total organic carbon analyzer is mainly used to determine the total organic carbon (TOC) content in water samples, soil, solid waste and other samples. It indirectly determines the total organic carbon content in the sample by converting the organic carbon in the sample into carbon dioxide (CO2) through specific analytical methods and measuring the amount of CO2 generated.

2、 Working principle

The working principle of the total organic carbon analyzer is based on the process of converting organic matter into carbon dioxide under specific conditions. Usually, this process includes sample oxidation (usually using high-temperature combustion or chemical oxidation methods), gas separation (separating the generated CO2 from other gases), and CO2 detection (detecting the amount of CO2 through methods such as infrared absorption and conductivity changes).

3、 Technical indicators

The technical specifications of the total organic carbon analyzer vary depending on the model and manufacturer, but generally include the following aspects:

Minimum detection limit: usually low, such as 4ug/L, indicating the lowest organic carbon content that the instrument can detect.

Range accuracy: generally within CV1.5%, indicating the accuracy level of the instrument throughout the entire measurement range.

Testing time: Faster, with both TC and IC testing taking about 3 minutes, improving detection efficiency.

Injection volume: adjustable, generally ranging from 10-2000uL, to meet the testing needs of different samples.

4、 Main functions

The main functions of a total organic carbon analyzer include:

Measurement of TC, IC, and TOC: capable of separately measuring the total carbon (TC), inorganic carbon (IC), and total organic carbon (TOC) content in the sample.

NPOC and TN determination: Some models can also measure parameters such as non particulate organic carbon (NPOC) and total nitrogen (TN).

Real time monitoring and online control: It has unique advantages in environmental monitoring and online control, and can monitor changes in organic carbon in water samples in real time.

5、 Usage method

When using a total organic carbon analyzer, the following steps are generally followed:

Check the instrument: Ensure that the appearance of the instrument is intact, without damage or missing parts; Check if the display screen and buttons are functioning properly.

Power on preheating: According to the instructions of the instrument, connect the power supply for preheating, and the preheating time is generally about 30 minutes.

Prepare reagents: According to the instructions, prepare the required reagents such as oxidants, catalysts, etc., and ensure that the reagents are within their expiration date.

Sample collection: Use a clean sampling container to collect the sample to be tested, avoiding contamination or cross contamination.

Sample pretreatment: Based on the properties and analysis requirements of the sample, necessary pretreatment such as filtration, dilution, etc. is carried out on the sample.

Set parameters: According to the instrument manual requirements, set measurement parameters such as measurement mode, temperature, pressure, etc.

Inject sample: Inject the processed sample into the measuring chamber of the instrument, taking care not to exceed the maximum scale line.

Start measurement: According to the instrument manual, start the measurement program, and the instrument will automatically perform steps such as sample oxidation, gas separation, and detection.

Reading result: After the measurement is completed, the instrument will display the measurement result, and users can record the data or conduct further analysis as needed.

6、 Precautions

When using a total organic carbon analyzer, the following precautions should be taken:

Safe operation: Follow safety operating procedures, wear necessary protective equipment, and avoid direct contact with chemical reagents and high-temperature components.

Maintenance: Regularly maintain the instrument, such as cleaning the instrument casing, replacing vulnerable parts, etc., to ensure that the instrument is in good working condition.

Reagent management: Pay attention to the storage and use conditions of reagents to avoid expiration or deterioration that may affect measurement results.

Data recording and analysis: Timely record measurement results and conduct necessary analysis and processing. For outliers or results that do not meet expectations, retesting or further analysis should be conducted.

In summary, the total organic carbon analyzer is an important analytical instrument that plays a significant role in multiple fields. By understanding its working principle, technical specifications, main functions, and usage methods, one can better utilize this tool for scientific research and practical applications.