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    STUDIA CHEMIA - Ediţia nr.2 din 2003  
         
  Articol:   STUDY OF ARSENIC DETERMINATION IN SOIL BY SPECTROMETRIC METHODS WITH AND WITHOUT HYDRIDE GENERATION.

Autori:  FRENŢIU TIBERIU, MICHAELA PONTA, NADIA ALEXA, GEORGIANA MECULESCU, MARIN ŞENILĂ, EMIL CORDOŞ. 		 
       
         
  Rezumat:  Arsenic determination in soil from residential and industrial area by inductively coupled plasma atomic emission spectrometry (ICP-AES) with and without hydride generation (HG) and hydride generation quartz furnace atomic absorption spectrometry (HG-QF-AAS) was investigated. The used HG device was manufactured at the Research Institute for Analytical Instrumentation, Cluj-Napoca, Romania. ICP-AES with direct liquid sample nebulization (limit of quantitation, LOQ 25 mg Kg-1) was suitable for As determination in contaminated soil, while HG-ICP-AES, five times more sensitive, allowed As determination in soil from both contaminated and non-contaminated area. According to the t-Test, ICP-AES and HG-ICP-AES gave similar As contents only in contaminated soils, while HG-ICP-AES and HG-QF-AAS gave similar As contents for all the analyzed samples. HG-ICP-AES and HG-QF-AAS furnished the same LOQ for As (5 mg Kg-1). The determination of As in a reference soil sample (5 replicates) proved both in HG-ICP-AES and HG-QF-AAS good precision (RSD 11.6%; 11.0%) and recovery degree (102.511.9 %; 101.211.2 %).  
         
     
         
         
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