Document xjRD6r5eD3dwnamd3vg1Z04z0
LOn*T'
February 26, 1969 ".octo? v;4ter solubility
______
*.R. E. Keller - So. Second ' VI. K. Richard - GO
E'. P. Wheeler - GO
:L. R. Stark General Offices
An analytical procedure for extracting, concentrating, and
measuring Aroclor at the sub ppm level in water has been
developed and verified with Aroclor "spiked11 tap water samples
(Table I).
'
This procedure was employed to determine the tap water solu bility of Aroclor 1242, 1248 and 1254 (Table II).
The Aroclor saturated tap water samples used in this study were prepared in the following manner: two 60-70 g. portions of each Aroclor fluid were placed in 32oa. narrow neck screw top glass bottles and 500 ml. of tap water (South Second Street) added to each. The bottles were then placed on a roller mill, rolled for 24 hours and allowed to stand undisturbed at room temperature (25C) until analyzed. The period of time between preparation and analysis was approximately 4-5 months.
Inspection of EC/GC traces and the data in Table II indicates
that the solubility or Aroclor is a function of both the amount
of chlorination and the position. This anticipated behavior
makes absolute quantification difficult since a standard with
the same isomer distribution of the water solubilized material
is impossible to prepare. Therefore, the "Aroclor found" was
calculated in this manner: the original Aroclor in question
was used as a standard and a calibration curve prepared by
plotting the peak height of the major isomers versus ug Aroclor.
The peak height response of the samples were then totaled,
corrected for a tap water blank response and the amount of
"Aroclor found" determined from the calibration curve. A
rough idea of the error inherent in this procedure can be
obtained by using 1242 as a standard for 1248, etc. A devia
tion on the order of +10% was experienced.
'
The data in Table II also seems to indicate that a stable
Aroclor-water emulsion is formed at approximately twice their
solubility levels.
'
The Pydraul. fluids being multi-component systems are a completely different story and as such will require much more effort. At this point, I think we should probably clarify what information is actually desired and if the need for this information can be justified in terms of the effort necessary to obtain it.
db
Attachments - 2
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E. Scott Tucker
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TARI.T'! X
RECOVERY of ?.p,oct.oh* from spiked tap waver swiri.ES**
__________USING r.c/cc. ______ __________________
Sample Number
ppb Aroclor Added
OK 88932
n
1980
OR 88932 (>2
1980
Sample Volume, (ml)
250
ppb Aroclor Found
1960
250
____ *
Per Cent Recovery * Comments
99.0
Aroclor 1242. Samples con centrated with vac. rot. evap. Results ob tained 9-6-68.
OR 88945
270
225
266
98.5 . Aroclor 1254.
1
Samples con-
centrated c
OR 88945
270
iw! **>
225
266
98.5
Kundera-Danish
evaporative
concentrators.
OR 88945
540
225
577
107.0
Results ob-
3
tained 12-13-68
OR 88945
540
225
577
10710
4
^ ^
O
am * v\ 43 f. t v*V i *i r> AH'!-! ^
r*
f~\ n t.t f.
employed. The results were quantified by preparing a calibration curve using a hexane solution of the Aroclor 1242 and 1254 used to spike the water samples. The major isomer peak area was used to ' ' construct the curve. The water samples were spiked by injecting jrl ' amounts of a concentrated acetone***-Aroclor solution.
* Sample contaminated - results discarded.
** Data used to confirm proposed water sample
work up procedure and concentration
techniques.
.
*** Spiked water samples contained 40-60 ppm Acetone.
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SOLUBILITY OF AROCLOR IN TAP WATER
Sample Idcnt. Number
1242 OR 80936-1+
-2+ -1* -2*
Grams Aroclor Sample Equilibrated Vol. (ml)
67.5 67.5 55.1 55.1
' 225 225 250 250
ppb Aroclor Found
193 213 372 378
Average
203 + 10
_
375 + 3
1248
'
OR CC936-1+
70.5
250
92
-2+
70.5
250
120
( 106 + 14 ;
-1*
70.6
224
196
-2*
70.6
225
222
209 + 13
. 1254
OR 88936-1+
73.2
250
-2+
73.2
250
51
............
. .50 + 2
48
-1*
69.7
224
134
:
-2*
69.7
225
143
139 + 5
Aqueous sample filtered through pre-wetted Whatman #2 filter paper
*
.
Aqueous sample carefully siphoned from bottle.
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