Increasing Productivity and Reducing Costs With Fast Sequential Mode for Atomic Absorption Spectroscopy

Importance of the Topic

Flame atomic absorption spectroscopy is widely used in laboratories that face increasing sample throughput and require multi element analysis. Enhancing the efficiency of FAAS workflows helps reduce running costs, sample waste and turnaround time.

Study Objectives and Overview

This overview compares conventional FAAS operation with Agilent s Fast Sequential mode and the combination of FS with PROMT acquisition. The goal is to evaluate improvements in sample throughput, gas consumption and total analysis time when determining nine elements in twenty samples.

Methodology and Instrumentation

The study employed Agilent 240FS and 280FS atomic absorption spectrometers. Three operating modes were tested: conventional FAAS with separate aspirations per element, Fast Sequential mode measuring multiple elements in a single aspiration, and Fast Sequential plus PROMT, which stops integration once target precision or maximum time is reached. Sample introduction used an SPS 4 autosampler with calibration zero, three standards, and periodic rinsing.

Key Results and Discussion

Conventional mode required 95 minutes to measure nine elements using three 3 second integrations each. Fast Sequential mode reduced the total time to 52 minutes by rapidly switching lamps and gas flows within one aspiration per sample. Adding PROMT acquisition further cut analysis time to 36 minutes while maintaining 0.5 percent precision within a 5 second cap. Acetylene consumption dropped from 190 liters in conventional mode to 72 liters with FS plus PROMT, a 62 percent reduction.

Benefits and Practical Applications

• Increased productivity: ten elements per sample in under two minutes
• Lower gas and sample usage, reducing operational and disposal costs
• No add on accessories required, enabling simple setup and rapid method development

Future Trends and Opportunities

Further integration of adaptive acquisition algorithms and real time optimization could accelerate analysis even more. Advances in multi element lamp technology and gas control systems may expand Fast Sequential capabilities. High throughput environments such as QA QC and environmental monitoring stand to gain significant efficiency benefits.

Conclusion

Agilent s Fast Sequential mode transforms FAAS workflows by enabling multi element determinations in a single aspiration, cutting analysis time and gas consumption without additional hardware. When combined with PROMT acquisition, it offers a cost effective solution for laboratories with high sample volumes.