Heavy metal measurement is an occupational hygiene measurement carried out to determine the concentration of toxic metals and metal compounds present in workplace air that can enter workers’ bodies via inhalation. Heavy metals such as lead, cadmium, nickel, chromium, arsenic, and mercury released during welding, casting, soldering, smelting, plating, painting, and machining operations accumulate in biological tissues and can cause severe acute and chronic occupational diseases.
Enterprises processing metals or metallic compounds must regularly measure airborne heavy metal concentrations, evaluate workers’ personal exposure levels, and implement effective exposure control measures.
WHAT IS HEAVY METAL MEASUREMENT?
Heavy metal measurement is the process of collecting airborne metal particulates onto membrane filters using personal sampling pumps, followed by laboratory digestion and elemental instrumental analysis. As a result of measurement, elemental concentrations (mg/m³) of individual heavy metals and workers’ personal exposure levels are determined.
Heavy metal measurements can be conducted as personal exposure measurements taken within the worker’s breathing zone or as ambient area measurements near emission points.
WHY IS HEAVY METAL MEASUREMENT IMPORTANT?
Heavy metals accumulate in organs such as the lungs, kidneys, liver, and bones, causing systemic poisoning, blood disorders, neurological damage, and carcinogenic effects. Regular monitoring protects worker health and ensures compliance with statutory chemical regulations.
Thanks to heavy metal measurements:
- Types and concentrations of heavy metals in the work environment are determined
- Workers’ personal exposure levels are measured
- Compliance with statutory occupational exposure limits is verified
- Local exhaust ventilation and filtration system efficiency is evaluated
- Engineering controls and appropriate respiratory protection are determined
In conclusion, regularly conducted heavy metal measurements prevent chronic occupational poisoning and ensure a safe work environment.
HEAVY METAL MEASUREMENT PARAMETERS
The main heavy metal and metal oxide measurement parameters we carry out as Haliç Occupational Hygiene Laboratory are as follows:
Elemental Heavy Metal Analyses
- Lead (Pb) measurement
- Cadmium (Cd) measurement
- Nickel (Ni) measurement
- Chromium (Cr) and Hexavalent Chromium (Cr+6) measurement
- Arsenic (As) measurement
- Mercury (Hg) measurement
- Copper (Cu) measurement
- Zinc (Zn) measurement
- Manganese (Mn) measurement
- Iron (Fe) measurement
Metal Oxide Analyses
- Aluminum oxide (Al2O3) measurement
- Magnesium oxide (MgO) measurement
- Calcium oxide (CaO) measurement
- Titanium dioxide (TiO2) measurement
HOW IS HEAVY METAL MEASUREMENT PERFORMED?
Heavy metal measurement is performed following standardized methodology in accordance with occupational hygiene standards:
- Processes, materials used, welding rods, and alloys are reviewed
- Exposed worker groups and sampling locations are determined
- Air sampling is conducted onto mixed cellulose ester (MCE) filters using calibrated pumps
- Sampling is maintained across representative work shifts
- Filters and field blanks are securely packaged and delivered to the laboratory
- Sample dissolution and instrumental analysis are performed, benchmarked against limit values, and reported
Sampling must be performed throughout actual operational activities and pump flow rates must be calibrated before and after sampling.
In which industrial sectors is heavy metal exposure common?
Heavy metal exposure is frequently encountered in foundries, metal smelting, welding and fabrication shops, battery manufacturing, electroplating, pigment and paint manufacturing, ship recycling, and mining operations.
Why is welding fume evaluated within heavy metal measurements?
Welding fumes contain fine respirable particulates of metal oxides, manganese, chromium, nickel, and iron generated from base metals and welding consumables that penetrate deep into the lungs.
How often should heavy metal measurements be conducted?
- Periodically in accordance with risk assessment schedules
- When welding methods, alloys, or raw materials change
- When ventilation or exhaust systems are modified
- When biological monitoring reveals elevated metal levels in blood or urine
- During official audits and inspections
HEAVY METAL MEASUREMENT AND TECHNICAL REPORTING
Haliç Occupational Hygiene Laboratory conducts personal and ambient heavy metal measurements using standardized sampling protocols and laboratory analyses, providing comprehensive technical reports benchmarked against statutory limit values.
In conclusion, enterprises obtain dependable data to control toxic metal exposure risks, optimize exhaust ventilation, and protect employee health.
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