Flow injection on-line preconcentration and separation combination with flame atomic absorption spectrometry(FAAS) enhance sensitivity and selectivity of FAAS on metal elements.

Determination of trace cadmium in water samples by flame atomic absorption spectrometry with flow injection on-line preconcentration;

Flame atomic absorption spectrometric determination of trace lead(Ⅱ) with flow injection on-line preconcentration;

A rapid and sensitive method for the determination of trace cadmium in environmental water samples has been developed, based on flow injection on-line preconcentration on two-microcolumn system coupled with flame atomic absorption spectrometry with derivative signal processing.

On-line concentration techniques have been employed more and more in many analytical areas over the past decade due to their advantages of simplicity, automation, low cost and high sensitivity.

The on-line concentration.

Study on on-line concentration techniques based on CE and LC-MS is of crucial importance to further explore the application in the area of in vivo pharmaceutical research and clinical practice.

Two on-line sample stacking methods in capillary electrophoresis,large volume sample stacking using reversed pressure as a pump(LVSRP) and large volume sample stacking using electroosmotic flow(EOF) pump(LVSEP),were developed for the separation and determination of carnosine,anserine and homocarnosine.