Analytical proposal for trace element determination in human hair. Application to the Biscay province population, northern Spain

作者：Carlos Raposo Juan; Navarro Patricia; Sarmiento Alfredo; Arribas Enara; Irazola Mireia; Maria Alonso Rosa

来源：Microchemical Journal, 2014, 116: 125-134.

DOI：10.1016/j.microc.2014.04.012

• Trace metals
• Scalp hair
• Human bio-monitoring
• ICP-MS
• ICP-OES

The proposed methodology was applied to 114 donors aged 0-90 years old from various geographical areas of the Biscay province (northern Spain) which were characterized by differing environmental conditions and dietary habits. 22 trace elements (Al, As, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Sr, Ti, V and Zn) were determined by inductively coupled plasma techniques (ICP) with mass spectrometry (MS) and optical emission (OES) detections. Analytical steps were deeply discussed including pre-treatment (washing) and acid treatment (microwave system). Additionally, the pre-treated and non pre-treated human hair samples were studied by scanning electron microscope coupled to an energy dispersive X-ray spectrometer (SEM-EDX). This microscale characterization was found essential to assess the proposed human hair washing step prior to the analytical determinations. %26lt;br%26gt;The essential chemical elements found were Al, Ca, K, Sr, Na and Zn with concentrations higher than 100 mg kg(-1). Trace metals exceeding 10 mg kg(-1) level were Mg, Fe and Cu (Fe %26gt; Cu). Other trace metals with concentrations greater than 1 mg kg(-1) were, in order of abundance, Hg %26gt; Ni %26gt; Ti. The lowest concentration values were found for Mn, Pb, Cr, Cd and As as minor elements. %26lt;br%26gt;Results revealed that the trace metal contents generally increased with the tap water consumption and environmental conditions. Specifically, smokers showed lower metal concentration levels than nonsmokers and Hg level directly increased with the fish consumption.

• 出版日期2014-9