In atomic spectroscopy, the Composition of a component in a sample is determined by its own electromagnetic or mass spectrum. Other analytical techniques that provide elemental determination include atomic absorption AA, atomic emission, and mass spectrometry. AA measures the quantity of light an atom absorbs, and takes a light source usually a hollow- cathode lamp or electrodeless discharge lamp, atom source, monochromator, detector, electronics, and a data screen. Bear in mind that fire AA shortens your analysis period, but graphite furnace AA significantly enhances sensitivity and detection limits. Simultaneous, multielement detection is the hallmark of inductively coupled plasma optical/atomic emission spectroscopy, or ICP-AAS/AES. You will also get superior limits of detection, higher sensitivity, and higher throughput. Solid-state sensors based on CCDs enhance flexibility.
Added atomic absorption spectroscopy comprise laser-induced breakdown spectroscopy LIBS, which can be easy and quick, with low-ppm detection limits and little to no sample prep, and high-spectral-range arc/spark AAS, for quick elemental analysis of solid metallic samples.
- Atomic energy
- Food testing
How do I select an atomic spectroscopy tool?
Selecting the right system can be complicated since the many techniques’ effectiveness in the laboratory can overlap. The best way to limit your choices is to take a close look at precisely what you want: Is your primary criterion fast throughput, results authenticity. A couple of things to bear in mind make certain the instrument’s detection limits are adequate to your laboratory, to avoid lengthy analyte concentration times, and carefully consider your required level of sample throughput. Instrumentation for fire AA and GFAA will come in at a lower price than multielement ICP-AAS since the former are generally less intricate instruments. Speaking of ICP-AAS, even though it is well known for multielement analysis, bear in mind that throughput can exceed 73 components per minute for individual samples.
Updates concentrate on multiple configurations like flame, furnace, mercury, and flow injection on a single space-saving unit, use of a xenon arc lamp as a single light source which also enhances sensitivity, enhanced auto sampling capacities, solids investigation without atomization, and nonmetals detection. Software capabilities are constantly improving system ease of use, especially important if more than one technician is using the machine.