GFAAS stands for which technique?

GFAAS stands for which technique?

• A. Graphite Furnace Absorption and Spectrometry
• B. Graphite Flame Atomic Absorption Spectronomy
• C. Graphite Furnace Atomic Absorption Spectronomy
• D. Graphite Furnace Atomic Absorption Spectrometry

Answer: (C)

GFAAS refers to Graphite Furnace Atomic Absorption Spectrometry, a form of atomic absorption spectroscopy that uses a graphite furnace as the atomizer. The key idea is that a tiny sample is placed inside a small graphite tube, then dried, charred, and rapidly heated to atomize the metals. A light beam at a wavelength specific to the element passes through the furnace, and the absorbance of that light by the free atoms is measured to determine concentration. Using the graphite furnace concentrates the heating and atomization in a very small volume, which greatly improves sensitivity and lowers detection limits compared with a flame. This makes GFAAS especially useful for trace metal analysis in environmental, clinical, and industrial samples. Note that the term is commonly written as Graphite Furnace Atomic Absorption Spectrometry; one of the answer options shows the same idea with a misspelling, but the intended meaning is the same.

GFAAS refers to Graphite Furnace Atomic Absorption Spectrometry, a form of atomic absorption spectroscopy that uses a graphite furnace as the atomizer. The key idea is that a tiny sample is placed inside a small graphite tube, then dried, charred, and rapidly heated to atomize the metals. A light beam at a wavelength specific to the element passes through the furnace, and the absorbance of that light by the free atoms is measured to determine concentration. Using the graphite furnace concentrates the heating and atomization in a very small volume, which greatly improves sensitivity and lowers detection limits compared with a flame. This makes GFAAS especially useful for trace metal analysis in environmental, clinical, and industrial samples. Note that the term is commonly written as Graphite Furnace Atomic Absorption Spectrometry; one of the answer options shows the same idea with a misspelling, but the intended meaning is the same.