INTRODUCTION

High concentration of mercury occurs in the natural gas. Mercury concentration in gas ranges from ng/m³ levels to hundreds of μg/m³. Besides its toxicity, mercury, being present in hydrocarbon gas, initiates corrosion of pipelines and catalyst poisoning during gas transportation and processing. These effects have serious implications for the gas-processing industry. The use of RA-915M mercury analyzer with Zeeman background correction of nonselective absorption provides direct real-time mercury determination in natural gas within the whole range of mercury concentration in natural gas from ng/m³ to mg/m³ level.