Of the techniques, UV/VIS, fluorescence, phosphorescence, chemiluminescence, ato
ID: 923024 • Letter: O
Question
Of the techniques, UV/VIS, fluorescence, phosphorescence, chemiluminescence, atomic absorption (flame and electrothermal), atomic emission (flame and plasma), IR, electrochemical methods, MS and GC, LC, SFC, chiral chromatography, select the one that you would use for the following situations, and defend your choice. You must tabulate your answers using the following headings: selected technique(s), analyte form, sample preparation, sensitivity and selectivity, precision & accuracy, and justification
a. Trace Fe in Seawater (as low as 1 x 10-21M)
b. Mercury in 1000 mg/m3 of laboratory air at 2 x 10-4M
c.Fe, Ca, Si, and Al in a soil extract (low ppb desired for
each metal)
d.Screening (i.e., rough analysis) of aspirin, phenacetin and
caffeine in commercial analgesic preparations
(cheap and quick screening desirable)
e. Isotopic ratios of chlorine atoms in archeological samples
f. ATP in biological samples
C6H5 Mirror CsHs CeHs CH3 CH3 CH2 CHCH2 CH CH2-CHCH -- 3CH C6H5CH2 CGH5CH2Explanation / Answer
a) Atomic emission spectroscopy
b) Flourescence
c) Atomic absorption spectroscopy
d) Liquid Chromatography
e) Mass spectroscopy and gas chromatography
f) Super critical fluid chromatography
g) Chiral Chromatography
h) UV- Visible Spectroscopy
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