Sample preparation

Sample preparation - context
Sample preparation - motivation
Purpose of sample preparation
Overview of preparation methods
     Liquid liquid extraction (LLE)
     Solid phase extraction (SPE)
     Solid phase microextraction (SPME)
     Purge and trap (PT)
     (Accelerated) Solvent extraction ((A)SE)
     Supercritical fluid extraction (SFE)
      Filter Techniques (FT)
Box 10 Filtration
Box 11 Sorbents
Box 12 Preconcentration
Selftest
     1) Polar organic solvent
           Answer
     2) Ideal extraction procedures
           Answer
     3) SPME
           Answer
     4) Extraction efficiency
           Answer
     5) Sorption capacity
           Answer
     6) Use as little of an extraction medium as possible
           Answer
     7) Should soil samples be grinded?
           Answer
     8) Solvent volume
           Answer
     9) Extracting an air sample
           Answer
Problems
End of chapter

4) Extraction efficiency

 

Question:

Extracting a water sample with X ml of solvent instead of two times X/2 ml of solvent is...

(1) ...more efficient.

(2) ...does not make a difference.

(3) ...less work.

(4) ...less efficient.

 

proceed to answer