The paper introduces a method for detecting elements dissolved in organic solvents using a slotted tube flame atomic absorption spectrometry. The method can enhance sensitivity and detection limit.
This document details an experimental study on enhancing the sensitivity and detection limits of Flame Atomic Absorption Spectrometry (FAAS). It investigates the combination of extracting metal samples into organic solvents and using an Agilent Atom Concentrator Tube (ACT). The study compares results obtained with aqueous solutions versus methyl isobutyl ketone (MIBK) solutions, both with and without the concentrator tube.
| Instrument Model | Agilent SpectrAA-10B0 Atomic Absorption Spectrometer |
|---|---|
| Burner Head | Mark VI burner head |
| Tube Model | Agilent Atom Concentrator Tube (ACT 80) |
| Tube Length | 150 mm |
| Acetylene Flow (Organic) | 1.2 L/min |
| Acetylene Flow (Aqueous) | 1.8 L/min |
| Air Flow Rate | 12 L/min |
| Measurement Time | 4 sec |
| Delay Time | 4 sec |
| Replicates | 3 |
The test solutions contained mixtures of Ag, Cu, Fe, Ni, and Pb.
Methyl isobutyl ketone (MIBK) was used as the organic solvent.
No, the enhancement effect is best for easily atomized elements and offers no advantage for refractive elements like iron and nickel.
The combination of extraction and the atom concentrator tube should theoretically result in a total improvement of 120 to 300 times.