Offline sampling is the classic approach: manually take gas and send it to the chromatograph after a reaction period. The advantage is simple equipment; the disadvantages are intermittent operation, easy missing of turning points, and large human error. Online gas chromatography (such as the μGAS1001 or the Labsolar-6A All-Glass Automatic Online Micro-Gas Analysis System) automatically outputs data continuously, suitable for long-term kinetics and high-throughput screening.
| Dimension | Offline sampling | Online gas chromatography |
|---|---|---|
| Time resolution | Low (per sample) | High (per cycle) |
| Repeatability | Affected by human factors | Programmatic, stable |
| Suitable scenario | Single-point verification | Kinetics, screening |
When using the PCX-50C Discover Multi-Channel Photocatalytic Reaction System for catalyst screening, offline sampling alone severely slows the pace; an online solution can feed gases from multiple channels into the same chromatograph in time-sharing, enabling high-throughput reading.
Free consultation: Not sure whether to go online or offline? Tell us your screening throughput and experimental cycle, and Perfectlight will calculate the return on investment for you and configure the μGAS1001 or PCX-50C.
Tel: 400-1161-365 / 010-62128921 Perfectlight Official Website
Use offline for single-point verification; prioritize online gas chromatography for stability curves, AQY, and catalyst-library screening.
When the PCX-50C multi-channel does high-throughput screening, offline sampling severely slows the pace; an online solution matches better.
Yes. Light intensity should be calibrated at the real sample position with the PL-MW2000; otherwise rates are not comparable.
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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