Original scientific paper

Traces of Cu, Mn and Zn in Aquatic Animals and Sediments from the Cris River Basin West Romania. Part I: Statistical Evaluation of Data Obtained by Atomic Emission Spectrometry with Radiofrequency Capacitively Coupled Plasma Source and Flame Atomic Absorption Spectrometry

Michaela Fonta ; Babes-Bolyai University, Department of Chemistry, 3400 Cluj-Napoca, 11 Arany Janos, Romania
Tiberiu Frentiu ; Babes-Bolyai University, Department of Chemistry, 3400 Cluj-Napoca, 11 Arany Janos, Romania
Ana-Maria Rusu ; Babes-Bolyai University, Department of Chemistry, 3400 Cluj-Napoca, 11 Arany Janos, Romania
Emil A. Cordos ; Babes-Bolyai University, Department of Chemistry, 3400 Cluj-Napoca, 11 Arany Janos, Romania

Abstract

The limits of detection in r.f.CCP-AES were 2 (Cu), 6 (Mn) and 3 (Zn) pg g_1. Statistic evaluation of the results was based on 31 samples collected in the basin of the Cris rivers, Romania. After removing the samples with a metal concentration lower than the limit of determination in TRT r.f.CCP-AES, the F-test (95% confidence level) showed similar precision in the two methods, with one exception in the case of Mn and one in the case of Zn. From 21, 28 and 31 determinations of Cu, Mn and Zn, statistical correlation and regression as well as the analysis of Bland and Altman (95% confidence level) showed systematic errors in TRT r.f.CCP-AES versus FAAS only in one case for Cu, two cases for Mn and one case for Zn. The metal content amounted to: 10-400 pg g-1 (Cu), 20-16000 pg g-1 (Mn) and 20-1200 pg g-1 (Zn).

Keywords

environment monitoring; biological samples; sediments; copper, manganese and zine determination; capacitively coupled plasma

Hrčak ID:

127504

URI

https://hrcak.srce.hr/127504

Publication date:

4.2.2002.

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