United States
Environmental Protection
Agency
Industrial Environmental Research
Laboratory
Research Triangle Park NC 27711
Research and Development
EPA-600/S2-84-012 Feb. 1984
&EPA Project Summary
Analysis of
Water-Soluble Organics
Linda H. Sadowski and Judith C. Harris
This report des
ment of methods
extractable water-
terial. To date, no
exist for the comp
and detection of su
procedures for
deal only with c<
extract into an
procedures described
oped with a view
information as pos
extractable water-
tent of a given sample
would complement
included in the
common organic
by EPA's Indust
Research Laboratoi -y.
Park, NC, to anno
the research projei
ribes the develop-
for analyzing non-
soluble organic ma-
analytical methods
ehensive separation
h compounds. Most
organic material
mpounds that will
organic solvent. The
here were devel-
obtaining as much
sible about the non-
soluble organic con-
. These procedures
those presently
Level 1 and other
analysis schemes.
polar
to i
EFA
This Project Summary was developed
ial Environmental
•, Research Triangle
ince key findings of
t that is fully docu-
mented in a separa te report of the same
title (see Project Report ordering infor-
mation at back).
Selected current journals and other
readily available literature were reviewed
to obtain information on analytical tech-
niques or methods which would be direct-
ly applicable in achieving the objectives of
this task. Most of the cited articles offered
solvent extraction as the mechanism of
separation for polar organic material from
pH-adjusted aqueous media.
Part I of the experimental portion of this
work was directed toward the analysis of
aqueous solutions of model compounds
selected from the non-extractable water-
soluble organic category. The procedures
included direct aqueous injection (DAI) on
five High Performance Liquid Chromato-
graphic Systems and one Gas Chromato-
graphic/Flame lonization Detection
System. Part II of the experimental ap-
proach addressed additional areas of
investigation; e.g., the application of
compound category colorimetric indicator
tests on mixtures of water-soluble or-
ganics. Methods for isolating the model
compounds from the aqueous media were
also investigated, and included total
organic carbon/freeze drying and modifi-
cation of the Level 1 scheme with gas
chromatography/Fourier transformation
infrared as a method of detection.
The DAI approach was investigated to
determine if it would provide qualitative
and semi-quantitative information for the
presence of water-soluble organic mater-
ials in aqueous matrices. Several model
compounds from nine different categories
were analyzed on five chromatographic
systems. The retention time data obtained
were used to construct standardized elu-
tion profiles. Positive identification of a
compound category for an unknown
species is made when the retention time
of a detected peak falls within the correct
retention time window for that category
in each chromatographic system.
The model compounds were analyzed
at concentrations of 1 5 to 200 mg/L.
With few exceptions, the precision of the
methods was defined by correlation coef-
ficients greater than 0.998. Detection
limits for most compounds were lower
than 25 mg/L. The DAI approach, utilizing
the fivefold retention time data base,
shows promise as a screening technique
for at least eight of the nine categories of
water-soluble model compounds investi-
gated.
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L. H. Sadowski and J. C. Harris are with Arthur D. Little. Inc., Cambridge. MA
02140.
Raymond S. Steiber is the EPA Project Officer (see below).
The complete report, entitled "Analysis erf Water-Soluble Organics," {Order No.
PB 84-141 225; Cost: $ 16.00, subject to change) will be available only from:
National Technical Information Service
5285 Port Royal Road
Springfield. VA 22161
Telephone: 703-487-4650
The EPA Project Officer can be contacted at:
Industrial Environmental Research Laboratory
U.S. Environmental Protection Agency
Research Triangle Park. NC 27711
•trd.S GOVERNMENT PRINTING OFFICE 1984-759-015/7303
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