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153

% recovery =  & ! ' / *.# - & ! " & # &0  × 100%


 & ! ' / ! 


% recovery =  0.56 - 0.08  × 100% = 96%

 0.50 

,
1
.# ! 'L - .
!
#&6 L
!
( 7 '
# 96% +/ ")
P' /
1 (

P

R
9.6 $$I W # $8"$% " %_ 823 # $ !8 $ IM $2!L
"# P (Caution of sample preparation for residue analysis)

9.6.1 4 " # $;O $! "$ (Evaporation)

6
*

!
( " /
cleanup "

solvent ! 2*
* ( 5 " /1
1

6/ *
H0 . 4!
*
!)2 ! "5
(

9.6.2 4 " # $# U O 4 #U # $;I; %" %_ (Dehydration)

71
71

"
!
( 5 6 " ! " " H

)

Y
" ! " " cleanup * ' !'L - .
1

adsorbent ( '
cleanup 5 5(3 (
*
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%
0

7

1

column
& , (" % & 6/ GC

/

71

1
("' 5

*( " ! !
( " * % sodium sulfate
anhydrous (Na SO ) sodium sulfate anhydrous 3 ' 500°C 3 %
/
+/

/
1
4
2
.6/
1 * ( sulfur phthalate esters +/ ! 7* 3 ! " detector & 6/ GC

9.6.3 4 " # $;P 8 $3 :#P (Washing)

,

&
' %
& ! .4
& H0 .4* ! (

6/
/

("
% acid 6 alkaline detergent ! (( " 71 8 ( ( " acetone

9.6.4 # $8#!O Emulsion
+/

M

2

( emulsion

( #
liquid-liquid partitioning
+7
/

( emulsion
" ." ( "
#% ( " % ( !

+7

)
RS % ( organic solvent ' / % liquid-liquid partitioning