ECOM L-3320 L-3320H AUTOSAMPLER

Importance of Automated Sampling in Analytical Workflows

Automated liquid sampling plays a crucial role in modern analytical laboratories by improving throughput, ensuring injection precision, and reducing manual errors. High reproducibility and minimal cross-contamination are essential for reliable quantitative analysis in fields such as pharmaceutical quality control, environmental monitoring, and biochemical research.

Study Objectives and Overview

This note presents the design and performance of the L-3320 and L-3320H autosampler models, designed to handle up to 96 vials—or up to 384 with optional plates—while offering advanced features for sample integrity and ease of operation. The aim is to evaluate the units’ accuracy, linearity, and robustness under varied injection modes.

Used Instrumentation

• L-3320 Autosampler (6000 PSI) and L-3320H Autosampler (9000 PSI)
• Standard 48-vial trays (1.5 mL) or optional 96-hole/384-hole panels
• Rheodyne switching valve for reliable flow path control
• Syringe options: 250 µL standard, 100 µL optional
• Clarity software for PC control via RS232 or USB interface

Methodology and Performance Metrics

Sample injections were conducted in three modes:

• Full-loop injection matching the loop volume (100 µL standard, optional 10/20/50 µL)
• Partial-loop injection (50% of loop volume)
• µL pickup injection minimizing sample loss (zero waste mode)

Key performance parameters:

• Reproducibility: RSD ≤0.3% (full loop), ≤0.5% (partial loop), ≤1% (µL pickup)
• Carry-over: <0.02% after programmed needle wash
• Linearity: >0.9999 over typical dynamic ranges
• Operating pressure: up to 6000 PSI (L-3320) and 9000 PSI (L-3320H)

Benefits and Practical Applications

• High throughput screening in pharmaceutical and environmental labs
• Enhanced analytical accuracy and repeatability for quantitative assays
• Minimal sample loss and low carry-over for trace analysis
• Standalone operation with self-checking routines reduces setup time
• Seamless integration with chromatography systems via Clarity software

Future Trends and Possibilities

Advancements may include:

• Expanded support for 384-well microplates to further increase throughput
• Integration with laboratory information management systems (LIMS)
• Enhanced automation using AI-driven error detection and remote monitoring
• Miniaturized flow paths for ultra-low volume analyses

Conclusion

The L-3320 series autosamplers deliver precise, reproducible sample introduction with minimal contamination, catering to diverse analytical tasks. Their robust design, flexible injection modes, and ease of use support high-accuracy workflows in research and quality control environments.