New Applications Using GC BID Detector

Importance of the Topic

The Barrier Ionization Discharge (BID) detector offers universal detection capability for nearly all analytes by generating a 17.7 eV helium plasma. This high-energy ionization enables sensitive analysis of permanent gases, volatile fatty acids, water, and light hydrocarbons at trace levels, surpassing traditional detectors in sensitivity and robustness.

Objectives and Study Overview

This work presents new gas chromatography (GC) applications employing the Shimadzu BID-2010 Plus detector. Two GC systems were configured to demonstrate simultaneous measurement of low-concentration permanent gases and light hydrocarbons, integrating trapping and selective valve switching to optimize detection across broad concentration ranges.

Instrumentation Used

UltiMate Shimadzu GC-2010 Plus system equipped with BID-2010 Plus universal detector
MolSieve 5A column for permanent gas trapping
Six-port and four-port switching valves for sample routing
Thermal conductivity detector (TCD) for high-concentration components

Methodology

System I: Permanent gases (H2, O2, N2, CO, CO2) are retained on a MolSieve column and released sequentially for BID analysis. Simultaneously, light hydrocarbons (C1–C6) bypass the trap and are profiled directly by BID. Valve timing is controlled to separate analyte streams.
System II: A four-port switching valve directs high-concentration gas fractions to the TCD while sending trace components to the BID, enabling dual-range quantitation using a single injection.

Main Results and Discussion

System I achieved repeatable detection of permanent gases at concentrations from 100 to 16 900 ppm and hydrocarbons down to 100 ppm, with signal stability over multiple injections. BID demonstrated over 100-fold sensitivity improvement relative to TCD and twofold over FID. System II effectively separated high and low concentration fractions, with the BID detecting trace levels (<10 ppm) and the TCD measuring bulk components (up to 830 000 ppm).

Benefits and Practical Applications

• Universal detection for comprehensive gas analysis with a single detector
• Enhanced trace sensitivity facilitating quality control in industrial and environmental monitoring
• Improved instrument stability due to low discharge current and high-temperature quartz chamber
• Streamlined workflows by replacing multiple detectors (TCD, FID, methanizer) with BID

Future Trends and Opportunities

With ongoing improvements in dielectric chamber design and valve automation, BID technology will expand into real-time process monitoring and field-portable GC systems. Integration with advanced data-processing and machine learning can enhance analyte identification and quantitation in complex matrices.

Conclusion

The Shimadzu GC BID-2010 Plus detector presents a robust and highly sensitive universal detection solution for GC analysis of permanent gases and volatile organics. Its compatibility with multi-valve architectures enables flexible application configurations, offering significant advantages for trace analysis and industrial monitoring.

References

• Wang Z, Lock N, Whitney R, Taylor CM. New Applications Using GC BID Detector. Poster PO-CON1406E, Pittcon 2014.
• Kitano K et al. Barrier Ionization Discharge Detector development. US patents (3 issued, 4 pending).