Document XORZxDg19Dqp1VjX9823yLGK4
TEST FOR SCREENING ASBESTOS
PLAINTIFF'S EXHIBIT
I. Scope and Application
This colorimetric test is applicable to the detection of magnesium and iron from asbestos in bulk samples. These samples include sprayed on asbestos as well as ceiling tiles. The test is simple and can be readily used in the field to screen for the presence or absence of asbestos.
II. Principle
The test is based upon the formation of color complexes with Mg+2 and Fe+2 released from asbestos. The Mg+2 from chrysotile is complexed with p-nitrophenylazo-a-naphthol. The Fe+2 from crocidolite and
amosite is complexed with 1, 10-phenanthroline. A positive test is indicated by the formation of colored complex for Mg+2 and/or Fe+2, and it indicates possible presence of asbestos.
III. Interferences
The test is a colorimetric spot test for magnesium and iron and is not specific for asbestos. A bulk sample may contain magnesium and iron compounds other than asbestos.
To test for possible interferring substances place a few drops of color forming reagents directly to the sample (Mg Reagent & Fe Reagent). If a blue color forms using the Mg Reagent, or a red color forms using the Fe Reagent, an interferring substance is present and the sample must be cleaned before the test is conducted to eliminate the inter ference. In this cleaning process, plaster, mineral wool, fiberglass, and soluble Mg and Fe compounds are removed to prevent their inter ference.
IV. Sensitivity, Precision, and Accuracy
A sample containing more than 1% asbestos gives a positive color reaction.
A total of 198 various field samples were tested without using the acid wash preceding the Iron Test. The results are listed below:
True
Positive
Number of samples
79
False Positive
50
True Negative
69
False Negative
0
Using the acid wash, the following results were obtained from 13 samples.
True
Positive
Number of samples
5
False Positive
0
True Negative
8
False Negative
0
SWRf/Asbestos 6204
Step 1 A. Place a sm all pea s iz e ($ ") sample in beaker. B. Add 5 drops o f a c e tic a cid and m ix w e ll.
QJ P r--
3 X E ~0
4->
>Cr_
o qj C P S- O r-
to to 03 CD
E P~ c +-> ^ ^
4-> to
m -co*-- a>4->
cn
tO T c to r-- a> qj p -- *r-
C3 r-- *r--
E r--
10 "O
X 10
OJ a4- x
to CD
s
CEO
-c
ro c
QJ (IS
P
X CD 10 Q- t-
E
So-
-a
+O->
>> r-
2
3 cn 03
in E
o
to <D
E to
s- c s- a>
0) QJ -C -C
<4- 05 O *r- E 4-5 P
a o CL P r-
QJ 05 PC. -C c
u Q- S- C C CD 4-5 v-
to o q-t- o in p r-
4-5 C-
05 3 "a
o r*
CD CL CD 5
CD
C X = O 1--
-o -O
s. O P O P CLi-- CD f-
3 = E <0 CD S-
P t- 0) S- rd P O CJ
0) U >> CD to o O to
3 4-> (0 IT3 "O 4-> S-. <D
CO r- r-- J r-- _X
a. -o
r- Q_
O CO i--
to P
-c to E
CL
"O
3
o O C S- 3 O J--
S- > 03 CD QJ *in z
*a Q. 4-5 i- CD `--' <c
S- f-- O CJ)
P
in f0 O *T-- 10 C i- cs
"0 4-
*r- CD o
o
>5*--
"O s_ 4-> Q_
a 03 O 4- C >) (IS s:
< J -C O CO to 3 H--1
oQ
>, i-- r-- 3P 4- O 0) i- E 03 O O 4-5
P ~o o C -Q rO
C S- *rCD
"O *
r-- CL
O3 -C
CD CD T3 -C -rP to
oE *--CD U CL 4- E
03
s~ to
CD SP ft <D r-- S-.
r- a> ro
P P CD r-- X)
CD *r>P C O as
E >> CD
CD 03 r-- OCi-- CJ
Ld
o r--
o
o
CD > S-
CD to _a
o
r--
o c
n-- 03
CD
3
A
X
X r~ r- E
EA
o P cc
03 CD
05
a <0
i-- u
cCcD
ra
QJ LL. U-
3:
P pO
O
CO
CL a. Oo
C. S-
xj "O
r-- Lf>
*o *o T3 *o
<<
CSJ CO
CL Q. OJ QJ PP cn cn
p
to CO
XE
p
QJ
to P
CD r-
P r--
rd o
a -or-
-o (J co r" s-
L)
S-
o S- P
oC
o o
0)
CD to
P <D
"O r-- S-
CD to Q-
S- O
E CD
< 03 JD
VI V/
V4
Po
o
r-- P
Pc
3 to
to o
to a> cd to CD JO _c O
to P P 03 to QJ P CD
<D QJ -r> JD P r-- to td
P rd O
r"
too
CM CO
rwt
> >> 03 -Q
to c -o
r CH VI
P 03 P 03 03 05 p >> C
CD 03 03 *-- C -C to 03
PP
O 1- c CL rd *--
P
CD C CD
> OP
r* CJ 3
05 r--
CD n
< s
CD O C
> >>P O
r~ P
O
05 !-- (D
t/5 21 00
P E-O to 05
i-- P P
CD r--
LU
tO *f-- 05 O P -Q to C
P rdr- C(O
P o
tO 03
0) J3 >> tO
xC:D
s. aj p p
2: P O i-- CD p P o c
S- i- O QJ CL-r- T3
P 05
3 P --
05 c QJ
p E to o CD aj
aj s- S-
TS O
05
C to r-
05 *r- S-
-C -- 05 CL
p o
CL
E to
to
>> CD JO rd P
oilpp
CO i--
21 QJ *r-- <d
>E
Qj A
S- 3 to
o QJ to o r ajp
-c 03 p aj
P CrtO QJ CL
SZ *r-- C/5 E
P QJ 05 O CD S- tO
QJ P s- to
c QJ o ai
to > to
*o P -r- rd
r-- *-- P
x) l a
3 3 -r- P
CD QJ
p x: to -c
O to to rd -C aj ox:
1--1 P !-- P
cn U O- P
Step 1 A. Place a sm all pea s iz e ( i " ) sample in beaker.
B. Add 7 drops o f g ly c e rin and mix w e ll.
OJ
-C OJ r--
S- r-- O'
to p E -o
QJ CD
r-- c QJ
QJ c
QJ
s_ 05"0
2 r" -C
H
o r-- o r--
P r--
OJ C u o r~ o
QJ C- p
05 s_
to
c QJ
r"
QJ 1-- i- -C
C CD to F CO
aj r-- P O P
Po
r-- cn
O QJ
QJ CL O c to
05 _c to c
S-. c OJ 5- r--
s~ E
r> r"
u rd CL to o
3
FF
>> 3 x: P QJ
to p-- P
to
to to o 10
JZ o o
Q. QJ 3
p
p S- Sw o
c
F to
p T3
+j
n p p 05
<r-- QJ o o C
o QJ c r" S-. o >> 5
3 _a QJ J-
-C s- o QJ
S- P p r-- x:
CL 05
a> O' QJ QJ
CD
p
O CL 05 p: to P OJ c L QJ
rd05 c 05 O' QJ O)
r-- &-
c 1-- c c 05 c QJ
QJ CD
u r- r* E r- c. 3 r-- C 3 c: > P
c CL P 1--
S- >1
s- r--
o o r-- <o
o QJ --
P s_ C QJ
, (O
to CL >1 t- CL
to >,
XJ
F CD
r-
P
to
S- SI o o n P
QJ P
05 r--
QJ QJ
to P p S-
05
> > aj
C- o
CD c
P CL CD s
r-- OJ >> O r--
r* CJ 05 P CL r--
rd rdP P
E
rdr-- S- P
r-- r--
P CD $-
rdo O a r-- QJ
H F r-- to OJ QJ r-- r* o
L- i_ CLP r--
c c to
QJ
o
CL
ro--
JZ to
U 3 3 03
05 r-- 2
QJ CL
OJ t/> O
F r---
CO
*o
PO
O T3 S-
x:
i--
05 -Q U T3 CD
tao.
3 3
QJ QJ U JZ
rdC QJ o to i--
3 05 P -C
E
rdQJ CJ
i--
p CD
r-- r--
3
CO > x:
r-- S- r-
o i--
p
QJ QJ P QJ ** in z
QJ 05
05
U o
s- QJ <'
rd r-- P CJ cn o o CO c S-.
x: r* CD
>i CL T3 S- P
rd rdc O C >>
rdr-- P
to 3
c h-- CC
oa.
s
CO Q. sz CD QJ O
rd-C P CL u
P OJ "O -
<+- u c o
CJ 05 --
CJ
>>
3P
4- O
CD
&- F
rd o Op
p
T3 o C -Q
05 c
S- r-- OJ -o * r--- Q. o3
x:
QJ QJ "O
x: r-- P to
F QJ
o
S-
n--
a.
pF
05
to
QJ C-
P QJ
rdr-- L.
r* QJ
P P a;
f--* X3
QJ r
rd> 4- c
O
roH >, OJ
aCD:
p-*
r--o
Q
S-
o r-- o >> O
*+-- r--
OJ 05
i-- C
S-- *p"
p
OJ
2 S- QJ r- >
r-- X +J S-
r-- r~
CO QJ
QJ E
to
2 -a xi
*o
X r--
crd
crd o
*o
E PC
:c C 05
-a
rcd
ord
z
QJ 05 *
05 X
CD *-
z C. E o a. o 05
CO S oo
IC CL
p PO
p o o $-
o -o
to to
CL Q. CL OJ
o O o sC- S- s- o o -a a E
C\J in in
o -o *o T3 *o -o a -o
< c <=c <
ro *3"
XX OJ CD pP 00 00
P <d
x: P
pZ
QJ to to QJ CD P L. to CL o r-- CD
XJ X c r-- >->
05
S- E o
CD
o
CJ r-- P
aj O
3 to r-- >i XJ C-
X <c u
-a
to QJ r* E
c
Po
r~ p
3 S-
to QJ
CD Q.
&-
OJ
CD X
X
PP
CO ft 3
EE
S-
oP
p to
QJ
pP
o
cc
o
to S-
CD r-
O
X5 QJ
X
S- P
o
r-- "O
o (J
crd
QJ ft
3 QJ
r-- >
X r-
rd
P 03
05
P CD t-H
