Silicones, a crucial raw material for the production of polycrystalline silicon and organic silicon, have their purity directly impacting the quality of downstream products. Traditional testing methods, which rely on manual sampling and laboratory analysis, are inefficient and pose significant risks. The implementation of online gas chromatography (GC) systems offers a more direct solution for quality control during the production process.

Traditional detection methods have pain points

• operating risk

Artificial sampling requires direct contact with chlorosilane (a highly corrosive liquid), which is a potential safety hazard to personnel.

• The process is cumbersome

After sampling, it needs to be transported in cold storage and manually sampled, and the time of single analysis is very long.

• Data lag

Production fluctuations cannot be mastered in real time, and quality problems are found with delay.

Advantages of online gas chromatography (GC) system application

Automatic detection

The system automatically completes sampling, gasification and injection without manual intervention.

You can set a fixed detection period (e.g., every 30 minutes) to cover the whole production period.

Targeted anti-corrosion design

The injection unit is made of corrosion-resistant materials and is suitable for the characteristics of chlorosilane medium.

The gas pipeline is equipped with a heating system to prevent the condensation or crystallization of samples.

Real-time data interconnection

The test results are directly transmitted to the control system, and abnormal data automatically trigger alarm.

Historical data storage supports quality traceability and process optimization.

Precise analysis

Detector selection: TCD, select the appropriate detector according to the actual situation of users, such as ECD, helium ion detector or mass spectrometry detector for low content impurities.

Carrier gas selection: hydrogen/helium.

Carrier gas flow rate: 30ml/min.

Inlet temperature: 150℃, it is recommended that the inlet temperature should not be too high to prevent the decomposition of samples at high temperature.

Detector temperature: 150℃, the boiling point of the sample is low, and there may be corrosive substances. Prevent the sample from being eroded by high temperature. The detector response is higher at low temperature.

Column temperature: constant temperature 50℃, the boiling point of the sample is low and the peak is fast. If there is a recombinant component, it is recommended to add a column box at the back and run the chromatographic column at high temperature.

High precision thermal conductivity detector (TCD) + corrosion resistant chromatographic column, separation degree increased by 50%, detection limit as low as 0.01%!

Continuous analysis of online gas chromatography (GC) system, data stability:

The online gas chromatography (GC) system was used to analyze the pipeline samples for five consecutive times. The RSD of the target components, dichlorosilane, trichlorosilane and silicon tetracloride, were all less than 2%, and the system showed excellent repeatability.

Technology enables, security upgrades

The high (Beijing) intelligent online gas chromatography (GC) system is not only an "analytical tool", but also a safety guard for the production of chlorosilane. Control the quality from the source, make data-driven decisions, and let every raw material stand the test!