The heavy metals panel is a group of tests that quantify specific, potentially toxic metals in blood or urine. It is carried out in order to determine the exposure of people working in the industrial sector to toxic substances in their working environment. The heavy metal test is performed using a blood sample or 24-hour urine sample, usually with a needle inserted into an arm vein. Special metal-free blood or acid-washed urine containers are used to minimize the potential for sample contamination from any external metal source. Heavy metal determinations made during the occupational health inspection phase; Determination of lead in urine, phenol in urine, hippuric acid in urine, and lead in blood.