Trace Metal Determinations Using Voltammetric (DPV-HMDE) and Atomic Absorption Spectrometry (F-AAS and ET-AAS) in Bottom Sediment, Cod, Herring, and Cormorant Tissue Samples

Abstract

Two years ago a consortium consisting of several Polish universities (including the Silesian University of Technology and Institute of Nuclear Chemistry and Technology) were established. The goal of this consortium was to implement a project called MODAS (production and attestation of new types of reference materials crucial for achieving European accreditation for Polish industrial laboratories). This project has sought the development and validation of new referPol. J. Environ. Stud. Vol. 24, No. 5 (2015), 1911-1917 AbstractWe developed a voltammetric method using hanging mercury drop electrode (HMDE) for the determination of copper, zinc, lead, and cadmium, and an atomic absorption spectrometry method with flame and electrothermical atomisation for the determination of cobalt, copper, cadmium, lead, zinc, ferrum, manganese, and nickel. These methods were applied for the determination of elements in bottom sediment and animal tissue samples -candidates for certificate reference materials. The mineralisation procedure using a closed microwave-assisted system, which allowed for total decomposition of samples, was applied. For accurate testing of developed methods for elemental determination, Buffalo River sediment (NIST) and fish muscle (ERM) certified reference materials were used. Limits of detection (LOD) and limits of quantification (LOQ) varied depending on technique used. For F-AAS, LOD values were between 2.2-12 mg·kg , for F-AAS, ET-AAS, and HMDE, respectively. Linearity ranges also varied for each technique: 0.005-1.0 mg·kg -1 for HMDE, 0.35-50 mg·kg -1 for ET-AAS, and 6.5-500 mg·kg -1 for F-AAS technique. Homogeneity within and between bottles was calculated for each element. Variances did not differ in a statistically significant way, which is why materials can be considered homogenous.

Preparation of Three New Certified Reference Materials for Food and Environmental Analysis and Certification Using Laboratory Intercomparison as well as Primary Reference Measurement Procedures

“…The work was performed within the MODAS consortium, which was formed at the initiative of the late professor J. Namieśnik of the Gdańsk University of Technology. Other works executed within the frame of the consortium activity were already published (Baranowska et al 2015, Baranowska et al 2017, Rutkowska et al 2018.…”