Method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H (tritium) concentrations of xylem waters and subsurface waters using time series sampling

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872639

Smith, Brian ^[1]; Menchaca, Leticia ^[1]

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1. 1126 Delaware St., Berkeley, CA 94702

A method for determination of .sup.18 O/.sup.16 O and .sup.2 H/.sup.1 H ratios and .sup.3 H concentrations of xylem and subsurface waters using time series sampling, insulating sampling chambers, and combined .sup.18 O/.sup.16 O, .sup.2 H/.sup.1 H and .sup.3 H concentration data on transpired water. The method involves collecting water samples transpired from living plants and correcting the measured isotopic compositions of oxygen (.sup.18 O/.sup.16 O) and hydrogen (.sup.2 H/.sup.1 H and/or .sup.3 H concentrations) to account for evaporative isotopic fractionation in the leafy material of the plant.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• Assignee: Smith, Brian (1126 Delaware St., Berkeley, CA 94702);Menchaca, Leticia (1126 Delaware St., Berkeley, CA 94702)
• Patent Number(s): US 5979228
• OSTI ID: 872639
• Country of Publication: United States
• Language: English

Related Subjects

method
determination
18
16
ratios
tritium
concentrations
xylem
waters
subsurface
time
series
sampling
insulating
chambers
combined
concentration
data
transpired
water
involves
collecting
samples
living
plants
correcting
measured
isotopic
compositions
oxygen
hydrogen
account
evaporative
fractionation
leafy
material
plant
method involves
time series
surface water
water sample
sampling chamber
water samples
isotopic fractionation
method involve
concentration data
involves collecting
isotopic composition
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