Tellurium and its compounds. Method of determining in workplace air
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2016, Vol 32, Issue 2
Abstract
Tellurium is used in the industry as an alloying addition (steel, lead alloys, magnesium and cop-per), a catalyst for chemical reactions and as addition to rubber. It is also used for coloring glass and porcelain. Tellurium is harmful to respiratory tract, eyes and skin. As a result of acute intoxication liver, nervous and cardiovascular systems can be damaged. Chronic exposure to tellurium causes drowsi-ness, headache, gastrointestinal disturbances and allergic reactions of the skin. Exposure limit values for tellurium and its compounds in workplace air are NDS 0.01 mg/m3 and NDSCh 0.03 mg/m[sup]3[/sup].The aim of this study was to develop a method for determining concentrations of tellurium and its compounds in workplace air in accordance with the requirements of Standard No. EN 482:2012E. The method involves collecting tellurium and its compounds from the air on a membrane filter, filter mineralization with concentrated nitric acid and determining tellurium in the solution pre-pared for analysis with atomic absorption spectrometry with electrothermal atomization (ET-AAS). The calibration curve of tellurium in the concentration range 10.00 - 100.00 g/l has a correlation coefficient R2 = 0.9998, and corresponds to the concentration range of 0.001 - 0.01 mg/m3 for a 720-L air sample. The average value of the efficiency factor of mineralization was 1.00.The developed method for determining tellurium and its compounds enables determination of the smallest amount in workplace air at the level of 0.001 mg/m3. The method is accurate, precise and it meets the requirements for procedures for determining factors used to determine occupational exposure. The developed method of determining tellurium and its compounds has been recorded as an analytical procedure (see appendix).
Authors and Affiliations
JOLANTA SURGIEWICZ
Keywords
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