Semi-on-line microwave-assisted digestion of shellfish tissue for the determination of selenium by electrothermal atomic absorption spectrometry

1996 ◽  
Vol 11 (2) ◽  
pp. 169-173 ◽  
Author(s):  
Marco A. Z. Arruda ◽  
Mercedes Gallego ◽  
Miguel Valcárcel
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Microwave Assisted ◽  
On Line ◽  
Microwave Assisted Digestion

scholarly journals Determination of Arsenic in Scalp Hair Samples from Exposed Subjects Using Microwave-Assisted Digestion With and Without Enrichment Based on Cloud Point Extraction by Electrothermal Atomic Absorption Spectrometry

2011 ◽  
Vol 94 (1) ◽  
pp. 293-299 ◽  
Author(s):  
Tasneem Gul Kazi ◽  
Jameel Ahmad Baig ◽  
Abdul Qadir Shah ◽  
Ghulam Abbas Kandhro ◽  
Sumaira Khan ◽  
...  
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Cloud Point Extraction ◽  
Scalp Hair ◽  
Electrothermal Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Microwave Assisted ◽  
Hair Samples ◽  
Triton X ◽  
Microwave Assisted Digestion

Abstract A simple and rapid cloud point extraction (CPE) procedure was applied for preconcentration of trace quantities of arsenic (As) in scalp hair samples. The samples were subjected to microwave-assisted digestion in a mixture of nitric acid and hydrogen peroxide (2 + 1, v/v) prior to preconcentration by CPE. The As in digested samples was complexed with ammonium pyrrolidine dithiocarbamate (APDC), and the resultant As-PDC complex was extracted by a nonionic surfactant, octylphenoxypolyethoxyethanol (Triton X-114). After centrifugation, the surfactant-rich phase was diluted with 0.1 M HNO3 in methanol and analyzed by electrothermal atomic absorption spectrometry. The experimental parameters, i.e., amount of APDC, concentration of Triton X-114, equilibrium temperature and time, were optimized. For validation of the proposed method, a certified reference material (CRM) of human hair (BCR 397) was used. No significant difference (P>0.05) was observed between the experimental results and certified values of the CRM (paired t-test). The LOD and LOQ obtained under the optimal conditions were 0.025 and 0.083 μg/kg, respectively. The developed method was applied for the determination of As in scalp hair samples from male and female subjects of two villages of Khairpur Mir's, Pakistan.

Sign in / Sign up

Export Citation Format

Share Document