Agriculture Reference
In-Depth Information
8.7.
Soil commonly contains water. Why are water and infrared spectroscopy
not compatible?
8.8.
Explain why water is rarely used as a solvent in NMR spectroscopy.
8.9.
Mass spectroscopy is useful because it can determine what important
characteristic of a compound?
8.10.
Explain, giving at least two reasons, why using UV-Vis or mass spec-
troscopy as a detector for chromatography might be beneficial.
8.11.
A researcher randomly picks test tubes and uses them in the spec-
trophotometer and obtains confusing results. Explain how this can
happen.
8.12.
Explain what a calibration curve is and how it is used.
8.13.
Two researchers prepare calibration curves; one researcher's curve has
an
r
2
of 0.9977 the other, an
r
2
of 0.9845. Which is the better calibration
curve? Explain how you came to this conclusion; be specific.
BIBLIOGRAPHY
Environemtal Protection Agency Test Methods SW-846 On-Line. Test methods for
evaluating solid wastes physical/chemical methods,
http://www.epa.gov/
epaoswer/haswaste/test/9_series.htm
.
Skoog DA, Holler FS, Nieman TA.
Principles of Instrumental Analysis
, 5th ed. Chicago:
Harcourt Brace, 1992.
REFERENCES
1. Fendorf S, Sparks DL. X-ray absorption fine structure spectroscopy. In
Methods of
Soil Analysis, Part 3: Chemical Methods
, Bartels JM (ed.). Masison WI: Soil Science
Society of America, Agronomy Society of America, pp. 377-416, 1996.
2. Guest CA, Schulze DG, Thompson IA, Huber DM. Correlating manganese X-ray
absorption near-edge structure spectra with extractable soil manganese.
Soil Sci.
Soc. Am. J.
66
:1172-1181, 2002.
3. Kola H, Perämäki P, Välimäki I. Correction of spectral interferences of calcium in
sulfur determination by inductively coupled plasma optical emission spectroscopy
using multiple linear regression.
J. Anal. Atom. Spectrom.
17
:104-108, 2002.
4. Atkins P, de Paula J.
Physical Chemistry
, 7th ed. New York: Freeman, p. 776, 2002.
5. Whittig LD, Allardice WR. X-ray diffraction techniques. In
Methods of Soil Analy-
sis, Part 1: Physical and Mineralogical Methods
, 2nd ed., Klute A (ed.). Madison,
WI: Soil Science Society of America, Agronomy Society of America, pp. 331-361,
1986.
6. Sparks DL.
Environmental Chemistry of Soils
, 2nd ed. New York: Academic Press,
pp. 135-140, 2003.
