Use of lanthanide shift reagents with [sup 31]P FT-NMR spectroscopy to analyze concentrated lake-water samples

Journal Article · Mon Aug 01 04:00:00 UTC 1994 · Environmental Science and Technology; (United States)

DOI:https://doi.org/10.1021/es00057a022· OSTI ID:7173357

Nanny, M A; Minear, R A ^[1]

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1. Univ. of Illinois, Urbana, IL (United States)

Several lanthanide shift reagents (LSR) were synthesized from praseodymium, europium, dysprosium, and terbium using ethylenediaminetetraacetic acid, trans-1,2-diaminocyclohexane-N,N,N[prime],N[prime]-tetraacetic acid, and diethylenetriaminepentaacetic acid for the purpose of separating overlapping [sup 31]P FT-NMR spectral signals of dissolved organic phosphorus compounds present in concentrated lake-water samples. The extent of change in signal position and line width of several known phosphorus compounds dissolved in pure water was examined as a function of solution pH and the molar ratio of LSR to phosphorus. Praseodymium ethylenediaminetetraacetate (PrEDTA) was determined to be the most effective LSR. Concentrated lake-water samples mixed with PrEDTA were examined with [sup 31]P FT-NMR. The use of PrEDTA provided separation of overlapping signals, indicated that phosphorus compounds were becoming isolated from the solution environment during sample concentration, enhanced the sensitivity of certain signals by possibly acting as a T[sub 1] relaxation agent, and did not precipitate in the presence of a high concentration of humic and fulvic acids. 31 refs., 4 figs., 1 tab.

• OSTI ID: 7173357
• Journal Information: Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 28:8; ISSN ESTHAG; ISSN 0013-936X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400102 -- Chemical & Spectral Procedures
400700 -- Radiochemistry & Nuclear Chemistry
54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
COMPILED DATA
DATA
DYSPROSIUM COMPOUNDS
EUROPIUM COMPOUNDS
FULVIC ACIDS
HUMIC ACIDS
INFORMATION
LAKES
LIGANDS
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MONITORS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PH VALUE
PRASEODYMIUM COMPOUNDS
RARE EARTH COMPOUNDS
RESONANCE
SURFACE WATERS
TERBIUM COMPOUNDS
WATER POLLUTION MONITORS