2026-10-29

Building a Photocatalytic Reaction System Combined with Gas Chromatography: Tubing, Calibration, and Pitfall Avoidance | Perfectlight

1. The Core of the Combination Is the "Interface"

The photocatalytic reaction system generates gas, and the gas chromatograph reads it; the injection valve and tubing between them are the make-or-break. The larger the tubing dead volume, the slower the response and the more the turning points are smoothed; therefore the combination solution should prioritize shortening and regularizing the connection path.

2. Four Steps to Build

Determine pressure matching between the reactor-chamber outlet and the chromatograph inlet;
Use the PLD-CGA1000 Composite Gas Analyzer or a quantitative loop to control injection volume;
Set the chromatography program (column temperature, carrier-gas flow, detector) to match the target gas;
Calibrate the response factor with standard gas.

3. Pitfalls to Avoid

Carrier gas containing water or impurities: contaminates the column and causes tailing;
Excessive pressure difference between reactor chamber and chromatograph: uncontrolled injection volume;
Calibrating only once: periodic re-check is recommended, especially after changing catalysts or long runs.

4. Cooperation with Light-Intensity Calibration

The combination solves "how to measure the gas," while light intensity determines "whether the reaction is fairly excited." Calibrate at the real sample position with the PL-MW2000 High-Intensity Light Power Meter so gas products are correctly linked to incident light intensity.

Free consultation: Tubing leaks and poor peak shapes in your combination? Perfectlight's μGAS1001 complete solution has standardized tubing and calibration into modules—connect and use right out of the box.

Tel: 400-1161-365 / 010-62128921　Perfectlight Official Website

Frequently Asked Questions (FAQ)

What is the most critical part of the combination?

The interface and tubing. The smaller the dead volume, the faster the response and the clearer the turning points.

How is calibration done?

Build a peak-area–amount-of-substance curve with known-concentration standard gas, covering the actual range.

What are the common faults?

Carrier-gas moisture causing tailing, injection runaway from pressure differences between reactor and chromatograph, and response-factor drift during long runs.

This article does not constitute a performance commitment; specific technical parameters are subject to the actual product documentation and mutual confirmation.

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