U.S. Geological Survey Open-File Report 97-43
Abstract
A method for determining levels of 2-bromoallyl alcohol and 2,3-dibromopropene
from ground-water samples using liquid/liquid extraction followed by gas
chromatography/mass spectrometry is described. Analytes were extracted
from the water using three aliquots of dichloromethane. The aliquots were
combined and reduced in volume by rotary evaporation followed by evaporation
using a nitrogen stream. The extracts were analyzed by capillary-column
gas chromatography/mass spectrometry in the full-scan mode. Estimated method
detection limits were 30 nanograms per liter for 2-bromoallyl alcohol and
10 nanograms per liter for 2,3-dibromopropene. Recoveries were determined
by spiking three matrices at two concentration levels (0.540 and 5.40 micrograms
per liter for 2-bromoallyl alcohol; and 0.534 and 5.34 micrograms per liter
for dibromopropene). For seven replicates of each matrix at the high concentration
level, the mean percent recoveries ranged from 43.9 to 64.9 percent for
2-bromoallyl alcohol, and from 87.5 to 99.3 percent for dibromopropene.
At the low concentration level, the mean percent recoveries ranged from
43.8 to 95.2 percent for 2-bromoallyl alcohol, and from 71.3 to 84.9 percent
for dibromopropene.
Contents
Abstract
Introduction
Analytical Method
Scope and Application
Reagent Preparation
Liquid/Liquid Extraction
Sample Concentration
Sample Analysis
Method Performance
Summary
References