Page 155 - 006
P. 155

149


                                                                           /1
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    3!    
  "  !   !    ("  
        #(
                                                        6






                                            67




                        M˜
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                                                        6/
                                    (" 
   %  % &      chopper,  blender,  grinder      Wiley  mill

                                      67
                                                            6

                                                                                          6






                        
     *   &    ,*     3    	7    ' /     ! 
#     % (    	  "    %   	  "
                                                       6
                                              6
                                   6/

                                                     /


                    71
                     *     
    .  *( $4.%   !  *       K  	  "  (      
  & 0
 &




                                                                                         Y
                       #(                  (" 
         ' 
   (      	  "  ' 
#  '   (
                                             67


                                                                                        /
                                                                                              	7
                                M˜


                                                                1


                      "     "	 &     	  '     	  "  '   (  ("     % subsampling techniques  . '



                                                        	7
                                                                                                     1
                                                                                                  6/
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                       	  "   ' /!0         (  Y
     	 * 
    "  	  "       &  '1 
     &         '!( H
                                                                                         ,
                                                                                             Y
                                                                                                 /
                                                                                      Y

                                                                              6
                                                                 Y

                                                  Y



                                          ,

                                                                                                  +7
                   " 5 !    H*    &    5(     
# 	  "     )  "  (3-5°C)     )  %    (-20°C)   
#
                   %  (    	  "      %  (    	 H0  . 4 .   *   3    
  !  " 	    !  . 4 
&

                   9.3  #	$ # O (Extraction)

                        
  !
(   
   "
   (     	 H .4  
* 
 	  "      &   
 #'*


                                                                                      ,


                                                           0
                                               6


                                                                                                 /
                                                  +
                   . *    (	     7

                        9.3.1  #	$8;3 #"    	;I;	% (Solvent selection)
                                 	 '     "' %  
     &    !  .4 
&         % ( distilled-in-glass



                                                             ,
                                    1

                                              /

                     6  pesticide residue (PR)   6  nano grade   	

    6 
 %  	 '1     "  &1     1 (	     7
                                1.      5  '1  9 
   " 
	# 	 H0  . 4' /    
     &      ,
                                2.      . *    H+  polarity     	 H0  . 4' /    
     &    ,(	     7
                                  - hydrophilic solvent      ' /* !
	( hydrophilic pesticides
                                  - lipophillic solvent      ' /* !
	( fat and oil soluble pesticides
                                   
   %!  3!         hydrophilic  
# lipophillic  *      !'L - .



                   !
	( 	 H0  . 4  
' /!0(
                                                                                                 /

                                                    0

                                3.  
      "    	 H .4   solvent      K *       6 
 solvent  '    "
                    	 H0  . 45( (        "! /     RS  5(    "
                                4.  %  (    	  "   ' /!
	(  	  "   ' /   71   	  "   ' /           	  "  '


                                                                                        6
                                                                                                   /

                                                                                 71

                                                                     /



                                 6 
 % solvent        !  (" 	  "  '     
 (high water content) * !
(

                                                                       71



                                                           /

                                                             71

                   ( " water miscible solvent !   	  "  '     * !
(( " acetonitrile !   # 	  "  '      /




                                                                                        1
                                                6



                      * !
(( " chloroform      dichloromethane  (&     	 !   #!    chloroform

                                                                             1
                   dichloromethane  .      !  
        ("   ' 
  '(   &   !          *


                                                       Y
                                                                                            6/
                                                                  1


                   !  ' /  &   (	 5 !) )
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