ABSTRACT
The advantages of this recent ly d e v e l o p e d technique are t w o - f o l d . B y p a s s i n g large v o l u m e s of wa te r samples t h r o u g h s o l i d phase t raps a n d d e s o r b i n g organ ics f r o m the s o l i d phase w i t h a r e la t ive ly s m a l l v o l u m e of superc r i t i ca l f l u i d v e r y large p reconcen t ra t ion factors c a n be ach i eved . A l s o , the use of ca rbon d i o x i d e or m e t h a n o l m o d i f i e d c a r b o n d i o x i d e or one of the o ther superc r i t i ca l f l u id s n o w ava i lab le , eg Freons , a v o i d the i n t r o d u c t i o n in to the extract of o rgan ic solvents a n d con taminan t s the re in w h i c h c o u l d interfere w i t h subsequent ana lys i s of the extracts. Recent w o r k o n the app l i ca t ions of superc r i t i ca l f l u i d extract ions to w a t e r a n d s o i l s amples is d i s cus sed be low.
