Document YjD1EmJ6ak02L2qJK3QV6jG5D
February 221 1977
John P . S c h e lz , C h a irm n
CTTA. T a sk F o rc e on Bound F o b in
T e s tin g o f C o n su lar T a lcu n P ro d u cts C o n tro l, A n a ly t ic a l L a b o ra to rie s
Jo hnso n (k Johnson R e se a rch C e n te r
Hew B ru n s w ic k , H ,J , 08910
Dear Jack;
En clo se d a re th e r e s u lt s o f my a n a ly sis- of th e sa u p lo s (S e t J ) fo r th e CTFA round ro b in a n a ly s is of c o n su m r t a lc p ro d u cts fo r a s b e s tifo rm
ary> hibolc m in e ra ls .
A s I m entioned to you a v e r the. phone F e b ru a ry 3 , 1977, X was a b le to foXIov? y o u r method p r e t t y c lo s e ly . Our in s tru m e n t, a P h i ll ip s APB 3500, lia s a cow puter program fo r d e te rm in in g background and g iv in cr n e t co u n ts d u rin g th e sto p sca n . The p rin c ip le u sed , how ever, is the same a s th e one in th e CTFA m ethod. .Although we used th e s l i t s
recommended in U ie CTFA method t we fin d t h a t a d iv e rg e n ce s l i t o f 0 . 5
and s re c e iv in g s l i t o f 0 .3 m i g iv e s lig h t ly g re a te r s e n s it iv it y .
Wo d id n o t fe llo w th e d is p e r s io n s t a in in g method f o r th e o p t ic a l m ic ro sco p y d e te rm in a tio n . In s t e a d , we used a r e f r a c t iv e in d e x liq u id between
the F I o f t a lc and th a t o f a v p h ib o le s . The am p hib o lcs w ere id e n t if ie d
b y th e Ssch e lin e s method and t h e ir o r ie n t a t io n in p o la riz e d li g h t .
A rn o ld S h u lte e , D iv is io n o f M ic ro b io lo g y , h as e v a lu a te d arid comp&r&'i
th e d is p e r s io n s t a in in g and p o la ris e d l i c h t te c h n iq u e s . H is eorw;nt are attach ed .
I f you h ave any q uestio ns- p le a s e g iv e ste a c a l l .
HJE JAW
hmd
CHW AES,
HFF-440 HFF-441 HFF-446 HFF-446
HFF-127
Sincerely yours,
Clifton H. Wilson D iv is io n o f Cosureties Technology Bureau o f Foods
CHP: dee
Approved: HMDaiv s : 02/ 22/77
V.
^ T n ^ J d u q ^ ll 4
m y *$& & *& 4 - --
. . . ***
^ fta n M u *
--a.
m p * S io : v r < ' >
4 ^T P a a M tt 4
iiS oe g rS i-x
m 0 & O it c<
It O # aoe s
trm m
i r & ts )
waidD mb' x ^ -m sw a x m m - x m m ^ w sm m m m im m w m a m
o jo
9fO$if2K3' .fO l&>JSTA'tc *g yz$.ix\
UW *
wvmi&og. sud ATaue> *Ax3*|6f .*3 3&o pu^v
tt^ f83qj$ ^IOhK ^ *($$$*! x^*8***
IW JHar i xS*if qawwex ^
u* v* aawex *** '$**3 jo Tsxrt itfe& pyq <mf izm& zm m jxo g&
*$*
ne ^' ;.v>jx wf pacanos* af @r{*$ jx *AxT*ta 3*a g$u JX trfuj***
UQ?#a&ot|* g s (im m fa c* *uf pa!ixatod)
$^T-X0$ ;o &*n
h# At? Attsrc $* qsnf
s*q -aso -aa^ <3X ^ 1^ ^ 'uflrjMK&a A .
Asm 40J vern ilo isj
m>T%3x%*& oa $mi
*t$| put PI^-TC
ttBfttdtq *P?W&$T $99 "X ft X oges te^tfctxg) ow %p XXT* ^ IC ^ T -v a a
sftfXT p u m p t 1/ '*990|prf ^pj<a smt
W Kf ?ou *ta sqat XT*
aptiva |sm ip am ae$ jo m ox %'&&&$ jp aog vm& XQ& fmt aaop00
^WJOJXXX? X a&iftx | j t x?ca-.tv? ppt/t sutau jk> sjpt<& .m ^o qnq *s*-*Aa
x&U Af&oe*2m xr&%x*a & saq x$serf$r aspi j ? jm & fe X T* pt*?|a tf* m
gWRFf&xm %mxp& %&pm&&f **&
oj*t $** up -
wpUEtdtefG
t e l L~ti\
vfM p xp n ;.. u z w m ^ f
pim AtsocmcojK t*op$db &?
- m &gp&wgPi *x i W& 4&r#z
v& am o sriafclK t 9tfW *8V ^ ro j?3*P*v x vt V&&PH ' oe ) o s^tanssseo
U a *>S>V
V/"
~ '^TP*i53 -t
^jeessoOT, *
^ jTIX^K^^ $ * $7*psaa& *
-
/'^l
*`
$
~
r> os '*/
*V < fo
Oi c< ti ce T*
$ .? *
OT # m *V 3
IP rtf
w aEU atv m&mm-mn xm~x &
c?m m ^ oe i ssasssaw* k & w &z*isv m m im m m zm -m
m m jt jo m&x&.i *a ^TOtay
' qaiw+a*
era $%
p - tjj 'jco
l i p * WC* i -y 'C y y . .
J p a a : a&g) $ * fC K $ X * v a : a y p :i.::n , ^
tm & XO&&Z par '&{t3 jo 3B$k?f i> p .vtq k$ im ^ xv. ;/y; g>
aaspif
ti tj|*pi p p . i{ y - j ;
ia o p 4 .it
y;?a: ^ *
o^tia^&rrp &:> m ftp# ;ts.*fl?c9 H:q r^rppr^ot') $p>jf ffctfp&pjorf -io
i ] |trcfc a# $sn p a i3#*fS$ q & q&j &$eq$tgci!
.-* ;.* y._
*vt4.t?-<r:0TP.\"ia
$a isj
m s&m?
a a ;P-' T1
*pftr(t go$*t *$$ u? iutafs# tso$fcStei*j$i m ?$$& tTp* ^ TtW p ajK ?
f !H I xiam $g v ' tf^efpsrf
$s$m *&
^a* &ara: s&yg
<&rys 3^at3rf& *** *-& jo w
3 ;tj `sa ,yru&
saofoa r,yjv
?*igr >?
x iV 4
,*o &sur$&
xzgiQ iMT^pwrjea v i t ? & jsstj*, psrasaapi os# JT sss^cSfc ?& a V p A
srt.
p K & p m * $t&|OQ m p A A p p a a r jr A jt so$*t :c<^ - fetw| ye i^ p a ^ i K i
Cat H p g ^ sra ) ^ p a y
AiA tSSpdb &? HttX&X&t *foq|L0 :a taK^f^t^! 'XX SM*# P a a a o -,.?* a T a ry rp ay.. \ r / y - a o j p a p : y i\ , a aaa..y ' *J& 38**a8o
U M *%%
.