Speciation of arsenic and selenium compounds by ion-pair reversed-phase chromatography with electrothermic atomic absorption spectrometry

2001 ◽  
Vol 918 (1) ◽  
pp. 87-98 ◽  
Author(s):  
B Do ◽  
S Robinet ◽  
D Pradeau ◽  
F Guyon
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Reversed Phase ◽  
Ion Pair ◽  
Reversed Phase Chromatography ◽  
Selenium Compounds

Ultrasound-Assisted Ion-Pair Dispersive Liquid–Liquid Microextraction of Trace Amounts of Lead in Water Samples Prior to Graphite Furnace Atomic Absorption Spectrometry Determination

2013 ◽  
Vol 96 (1) ◽  
pp. 161-165 ◽  
Author(s):  
Daryoush Afzali ◽  
Ali Reza Mohadesi ◽  
Masoumeh Falahnejad ◽  
Behnoosh Bahadori
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Water Samples ◽  
Graphite Furnace ◽  
Absorption Spectrometry ◽  
Ion Pair ◽  
Graphite Furnace Atomic Absorption ◽  
Dispersive Liquid Liquid Microextraction ◽  
Liquid Microextraction

Abstract A new ion-pair dispersive liquid–liquid microextraction method is described for separation and preconcentration of trace amounts of lead in different water samples. Graphite furnace atomic absorption spectrometry was used for determination of lead. The ion association complex between lead and iodide ions that forms is PbI4–2-tetradecyldimethylbenzylammonium, which is extracted into fine droplets of chlorobenzene. In order to reach the optimized experimental conditions, the influence of different parameters, such as concentration of KI, nature and volume of extraction solvents, pH effect, extraction time, and the period and speed of sonication and centrifugation, were optimized. The LOD was 0.08 ng/mL and the linear dynamic range was 0.20–8.0 ng/mL in initial solution with a correlation coefficient of 0.9985. Under the optimum conditions, the enrichment factor was 555.5. The proposed method was successfully applied for separation and determination of lead in sea, rain, river, and drinking water samples.

Sign in / Sign up

Export Citation Format

Share Document