(1) Improving the sensitivity by the reduction of sample loss;
(2) Shortening the time consumption of SP with less labor;
(3) Reducing the sample contamination and possible degradation
of analytes owing to the online sample preparation that takes
place in a closed system;
(4) Improving operation reproducibility and further enhancing
the analytical precision and accuracy owing to the automated
online process with less human errors;
(5) Potentially reducing the consumption of organic solvents and
samples during online SP procedure, especially for the miniaturized
online systems.