![]() To evaluate occupational exposure to cadmium, spot urine samples were collected from 49 tile and pottery glazers in Yazd City in 2010 at the beginning and end of the work shift (98 samples). Cadmium is one of the major raw materials for production of colored glazes. Glazers are exposed to a variety of heavy metals in the ceramic industry, causing adverse effect on the body systems. Spirometric parameters were significantly lower in the glazers compared to the control group (P Tile glazers had higher concentrations of cobalt than the pottery glazers. Results: The mean value of cobalt concentration in glazers was 5.5 times higher than the ACGIH threshold limit value (0.02 mg/m3). T-tests was carried out to compare the cobalt concentrations between groups. The lung function tests were also performed on each control and cobalt exposed subjects. In order to examine whether a correlation exists between work shifts, kind of job, ventilation system, and cobalt concentration, all participants filled out a self administered questionnaire. Materials and methods: An air sample was taken from the breathing zone of each worker continuously for 8 h on a cellulose ester membrane filter of 37 mm diameter followed by determination of cobalt concentration using Inductively Coupled Plasma-atomic Emission Spectroscopy (ICP-AES). ![]() The aim of this study was to determine the concentration of cobalt in the breathing zone of 49 glazers exposed to this metal while mixing, handling, and firing processes is performed in the ceramic industry. Cobalt is used in glaze to produce blue dye therefore, occupational exposure can be taken place, causing adverse effect on the body organs. Introduction: Glazers in ceramic industry are exposed to a variety of glazes, containing heavy metal salts, particularly cobalt.
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