Tin and its inorganic compounds. Method of determining in workplace air
Journal Title: Podstawy i Metody Oceny Środowiska Pracy - Year 2016, Vol 32, Issue 2
Abstract
Tin at room temperature is a soft, silvery metal. In the industry it is used as a component of bearing, brazing and casting alloys and for the preparation of protective coatings, dishes and tin amalgam.Tin compounds are toxic. The result of exposure to tin can be a non-collagenous pneumoconiosis referred to as the cynics. Tin and its compounds cause skin irritation and chronic conjunctivitis. Tin compounds accumulate in the body. Exposure limit value (NDS) for tin and inorganic compounds is 2 mg/m3.The aim of this study was to develop a method for determining concentrations of tin and its inorganic compounds in workplace air in the range from 1/10 to 2 NDS values, in accordance with the requirements of Standard No. PN-EN 482:2012E. The developed method replaces the method described in Standard No. PN Z-04229-03:1996.The method involves collecting tin and its compounds from the air on a membrane filter, filter mineralization with concentrated hydrochloric acid and nitric acid, and determining tin in the solution prepared for analysis with flame atomic absorption spectrometry (AAS). The calibration curve obtained in the concentration range 5.00 - 120.0 mg/ml has a high correlation coefficient (R2 = 1.0000) and corresponds to the concentration range of 0.17 - 4.17 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 tin and its inorganic compounds enables determination of the smallest amount in workplace air at the level of 0.17 mg/m3. The method is accurate, precise and it meets the criteria for procedures for determining chemical agents used to evaluate occupational exposure. The developed method of determining tin and its inorganic compounds has been recorded as an analytical procedure (see appendix).
Authors and Affiliations
JOLANTA SURGIEWICZ
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